ADOPTS WITH AMENDMENTS:

NFPA 70, 2017

Heads up: There are no amended sections in this chapter.

Part I General

This article covers the installation of conductors, equipment, and field wiring for electric signs, retrofit kits, and outline lighting, regardless of voltage. All installations and equipment using neon tubing, such as signs, decorative elements, skeleton tubing, or art forms, are covered by this article.

Informational Note: Sign and outline lighting illumination systems include, but are not limited to, cold cathode neon tubing, high-intensity discharge lamps (HID), fluorescent or incandescent lamps, light-emitting diodes (LEDs), and electroluminescent and inductance lighting.

LED Sign Illumination System. A complete lighting system for use in signs and outline lighting consisting of light-emitting diode (LED) light sources, power supplies, wire, and connectors to complete the installation.

Neon Tubing. Electric-discharge luminous tubing, including cold cathode luminous tubing, that is manufactured into shapes to illuminate signs, form letters, parts of letters, skeleton tubing, outline lighting, other decorative elements, or art forms and filled with various inert gases.

Photovoltaic (PV) Powered Sign. A complete sign powered by solar energy consisting of all components and subassemblies for installation either as an off-grid stand-alone, on-grid interactive, or non-grid interactive system.

Section Sign. A sign or outline lighting system, shipped as subassemblies, that requires field-installed wiring between the subassemblies to complete the overall sign. The subassemblies are either physically joined to form a single sign unit or are installed as separate remote parts of an overall sign.

Sign Body. A portion of a sign that may provide protection from the weather but is not an electrical enclosure.

Skeleton Tubing. Neon tubing that is itself the sign or outline lighting and is not attached to an enclosure or sign body.

Fixed, mobile, or portable electric signs, section signs, outline lighting, photovoltaic (PV) powered signs, and retrofit kits, regardless of voltage, shall be listed, provided with installation instructions, and installed in conformance with that listing, unless otherwise approved by special permission.
Field-installed skeleton tubing shall not be required to be listed where installed in conformance with this Code.
Outline lighting shall not be required to be listed as a system when it consists of listed luminaires wired in accordance with Chapter 3.

(C) Existing Signs

AMENDMENT
This section has been amended at the state or city level.
Unlisted signs constructed or erected prior to February 7, 2002, shall comply with Chapter 14-36 of the Chicago Building Code, 1999 edition.
Signs and outline lighting systems shall be listed; marked with the manufacturer's name, trademark, or other means of identification; and input voltage and current rating.
  1. The retrofitted sign shall be marked that the illumination system has been replaced.
  2. The marking shall include the kit providers and installer's name, logo, or unique identifier.
  3. Signs equipped with tubular light-emitting diode lamps powered by the existing sign sockets shall include a label alerting the service personnel that the sign has been modified. The label shall meet the requirements of 110.21(B). The label shall also include a warning not to install fluorescent lamps and shall also be visible during relamping.
Signs and outline lighting systems with lampholders for incandescent lamps shall be marked to indicate the maximum allowable lamp wattage per lampholder. The markings shall be permanently installed, in letters at least 6 mm (1/4 in.) high, and shall be located where visible during relamping.
The markings required in 600.4(A) and listing labels shall not be required to be visible after installation but shall be permanently applied in a location visible during servicing.
Marking labels shall be permanent, durable and, when in wet locations, shall be weatherproof.
All signs, outline lighting, skeleton tubing systems, and retrofit kits shall be marked to indicate that field wiring and installation instructions are required.

Exception: Portable, cord-connected signs are not required to be marked.

Each commercial building and each commercial occupancy accessible to pedestrians shall be provided with at least one outlet in an accessible location at each entrance to each tenant space for sign or outline lighting system use. The outlet(s) shall be supplied by a branch circuit rated at least 20 amperes that supplies no other load. Service hallways or corridors shall not be considered accessible to pedestrians.
Branch circuits that supply signs shall be rated in accordance with 600.5(B)(1) or (B)(2) and shall be considered to be continuous loads for the purposes of calculations.
Branch circuits that supply neon tubing installations shall not be rated in excess of 30 amperes.
Branch circuits that supply all other signs and outline lighting systems shall be rated not to exceed 20 amperes.
Wiring methods used to supply signs shall comply with 600.5(C)(1), (C)(2), and (C)(3).
The wiring method used to supply signs and outline lighting systems shall terminate within a sign, an outline lighting system enclosure, a suitable box, or a conduit body.
Signs and transformer enclosures shall be permitted to be used as pull or junction boxes for conductors supplying other adjacent signs, outline lighting systems, or floodlights that are part of a sign and shall be permitted to contain both branch and secondary circuit conductors.
Metal or nonmetallic poles used to support signs shall be permitted to enclose supply conductors, provided the poles and conductors are installed in accordance with 410.30(B).
Each sign and outline lighting system, feeder conductor(s), or branch circuit(s) supplying a sign, outline lighting system, or skeleton tubing shall be controlled by an externally operable switch or circuit breaker that opens all ungrounded conductors and controls no other load. The switch or circuit breaker shall open all ungrounded conductors simultaneously on multi-wire branch circuits in accordance with 210.4(B). Signs and outline lighting systems located within fountains shall have the disconnect located in accordance with 680.13.

Exception No. 1: A disconnecting means shall not be required for an exit directional sign located within a building.

Exception No. 2: A disconnecting means shall not be required for cord-connected signs with an attachment plug.

Informational Note: The location of the disconnect is intended to allow service or maintenance personnel complete and local control of the disconnecting means.

The disconnecting means shall be permitted to be located in accordance with 600.6(A)(1), (A)(2), and (A)(3):
The disconnect shall be located at the point the feeder circuit or branch circuit(s) supplying a sign or outline lighting system enters a sign enclosure, a sign body, or a pole in accordance with 600.5(C)(3). The disconnect shall open all ungrounded conductors where it enters the enclosure of the sign or pole.

Exception No. 1: A disconnect shall not be required for branch circuit(s) or feeder conductor(s) passing through the sign where enclosed in a Chapter 3 listed raceway or metal-jacketed cable identified for the location.

Exception No. 2: A disconnect shall not be required at the point of entry to a sign enclosure or sign body for branch circuit(s) or feeder conductor(s) that supply an internal panelboard(s) in a sign enclosure or sign body. The conductors shall be enclosed in a Chapter 3 listed raceway or metal-jacketed cable identified for the location. A field-applied permanent warning label that is visible during servicing shall be applied to the raceway at or near the point of entry into the sign enclosure or sign body. The warning label shall comply with 110.21(B) and state the following: "Danger. This raceway contains energized conductors." The marking shall include the location of the disconnecting means for the energized conductor(s). The disconnecting means shall be capable of being locked in the open position in accordance with 110.25.

The disconnecting means shall be within sight of the sign or outline lighting system that it controls. Where the disconnecting means is out of the line of sight from any section that is able to be energized, the disconnecting means shall be lockable in accordance with 110.25. A permanent field-applied marking identifying the location of the disconnecting means shall be applied to the sign in a location visible during servicing. The warning label shall comply with 110.21(B).
The following shall apply for signs or outline lighting systems operated by electronic or electromechanical controllers located external to the sign or outline lighting system:
  1. The disconnecting means shall be located within sight of the controller or in the same enclosure with the controller.
  2. The disconnecting means shall disconnect the sign or outline lighting system and the controller from all ungrounded supply conductors.
  3. The disconnecting means shall be designed such that no pole can be operated independently and shall be lockable in accordance with 110.25.

Exception: Where the disconnecting means is not located within sight of the controller, a permanent field-applied marking identifying the location of the disconnecting means shall be applied to the controller in a location visible during servicing. The warning label shall comply with 110.21(B).

Switches, flashers, and similar devices controlling transformers and electronic power supplies shall be rated for controlling inductive loads or have a current rating not less than twice the current rating of the transformer or the electronic power supply.
Metal equipment of signs, outline lighting, and skeleton tubing systems shall be grounded by connection to the equipment grounding conductor of the supply branch circuit(s) or feeder using the types of equipment grounding conductors specified in 250.118.

Exception: Portable cord-connected signs shall not be required to be connected to the equipment grounding conductor where protected by a system of double insulation or its equivalent. Double insulated equipment shall be distinctively marked.

The equipment grounding conductor size shall be in accordance with 250.122 based on the rating of the overcurrent device protecting the branch circuit or feeder conductors supplying the sign or equipment.
Equipment grounding conductor connections shall be made in accordance with 250.130 and in a method specified in 250.8.
Auxiliary grounding electrode(s) shall be permitted for electric signs and outline lighting systems covered by this article and shall meet the requirements of 250.54.
Metal parts of a building shall not be permitted as a secondary return conductor or an equipment grounding conductor.
Metal parts and equipment of signs and outline lighting systems shall be bonded together and to the associated transformer or power-supply equipment grounding conductor of the branch circuit or feeder supplying the sign or outline lighting system and shall meet the requirements of 250.90.

Exception: Remote metal parts of a section sign or outline lighting system only supplied by a remote Class 2 power supply shall not be required to be bonded to an equipment grounding conductor.

Bonding connections shall be made in accordance with 250.8.
Metal parts of a building shall not be permitted to be used as a means for bonding metal parts and equipment of signs or outline lighting systems together or to the transformer or power-supply equipment grounding conductor of the supply circuit.
Listed flexible metal conduit or listed liquidtight flexible metal conduit that encloses the secondary circuit conductor from a transformer or power supply for use with neon tubing shall be permitted as a bonding means if the total accumulative length of the conduit in the secondary circuit does not exceed 30 m (100 ft).
Small metal parts not exceeding 50 mm (2 in.) in any dimension, not likely to be energized, and spaced at least 19 mm (3/4 in.) from neon tubing shall not require bonding.
Where listed nonmetallic conduit is used to enclose the secondary circuit conductor from a transformer or power supply and a bonding conductor is required, the bonding conductor shall be installed separate and remote from the nonmetallic conduit and be spaced at least 38 mm (11/2 in.) from the conduit when the circuit is operated at 100 Hz or less or 45 mm (13/4 in.) when the circuit is operated at over 100 Hz.
Bonding conductors shall comply with (1) and (2).
  1. Bonding conductors shall be copper and not smaller than 14 AWG.
  2. Bonding conductors installed externally of a sign or raceway shall be protected from physical damage.
Signs or outline lighting installed inside a fountain shall have all metal parts bonded to the equipment grounding conductor of the branch circuit for the fountain recirculating system. The bonding connection shall be as near as practicable to the fountain and shall be permitted to be made to metal piping systems that are bonded in accordance with 680.53.

Informational Note: Refer to 600.32(J) for restrictions on length of high-voltage secondary conductors.

Live parts, other than lamps, and neon tubing shall be enclosed. Transformers and power supplies provided with an integral enclosure, including a primary and secondary circuit splice enclosure, shall not require an additional enclosure.
Enclosures shall have ample structural strength and rigidity.
Sign and outline lighting system enclosures shall be constructed of metal or shall be listed.
Sheet copper or aluminum shall be at least 0.51 mm (0.020 in.) thick. Sheet steel shall be at least 0.41 mm (0.016 in.) thick.
Metal parts of equipment shall be protected from corrosion.

(A) Vehicles

AMENDMENT
This section has been amended at the state or city level.
Sign or outline lighting system equipment shall be at least 4.9 m (16 ft) above areas accessible to vehicles unless protected from physical damage.

Informational Note: See Chapter 13-20, Article XIII, of the Chicago Building Code.
Neon tubing, other than listed, dry-location, portable signs, readily accessible to pedestrians shall be protected from physical damage.

Informational Note: See 600.41(D) for additional requirements.

Signs and outline lighting systems shall be installed so that adjacent combustible materials are not subjected to temperatures in excess of 90°C (194°F).

The spacing between wood or other combustible materials and an incandescent or HID lamp or lampholder shall not be less than 50 mm (2 in.).

Signs and outline lighting system equipment for wet location use, other than listed watertight type, shall be weatherproof and have drain holes, as necessary, in accordance with the following:
  1. Drain holes shall not be larger than 13 mm (1/2 in.) or smaller than 6 mm (1/4 in.).
  2. Every low point or isolated section of the equipment shall have at least one drain hole.
  3. Drain holes shall be positioned such that there will be no external obstructions.
Portable or mobile signs shall be adequately supported and readily movable without the use of tools.
An attachment plug shall be provided for each portable or mobile sign.
Portable or mobile signs in wet or damp locations shall comply with 600.10(C)(1) and (C)(2).
All cords shall be junior hard-service or hard-service types as designated in Table 400.4 and have an equipment grounding conductor.
The manufacturer of portable or mobile signs shall provide listed ground-fault circuit-interrupter protection for personnel. The ground-fault circuit interrupter shall be an integral part of the attachment plug or shall be located in the power-supply cord within 300 mm (12 in.) of the attachment plug.
Portable or mobile signs in dry locations shall meet the following:
  1. Cords shall be SP-2, SPE-2, SPT-2, or heavier, as designated in Table 400.4.
  2. The cord shall not exceed 4.5 m (15 ft) in length.
Field-installed secondary circuit wiring for electric signs, retrofit kits, outline lighting systems, skeleton tubing, and photovoltaic (PV) powered sign systems shall be in accordance with their installation instructions and 600.12(A), (B), or (C).
Neon and secondary circuit wiring of 1000 volts or less shall comply with 600.31.
Neon secondary circuit wiring of over 1000 volts shall comply with 600.32.
Where the installation complies with 600.33 and the power source provides a Class 2 output that complies with 600.24, either of the following wiring methods shall be permitted as determined by the installation instructions and conditions.
  1. Wiring methods identified in Chapter 3
  2. Class 2 cables complying with Table 600.33(A)(1) and Table 600.33(A)(2)
Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be of the self-contained type or be enclosed by placement in a listed sign body or listed separate enclosure.
Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be located where accessible and shall be securely fastened in place.
Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be installed as near to the lamps or neon tubing as practicable to keep the secondary conductors as short as possible.
Ballasts, transformers, electronic power supplies, and Class 2 power sources used in wet locations shall be of the weatherproof type or be of the outdoor type and protected from the weather by placement in a sign body or separate enclosure.
A working space at least 900 mm (3 ft) high × 900 mm (3 ft) wide × 900 mm (3 ft) deep shall be provided at each ballast, transformer, electronic power supply, and Class 2 power source or at its enclosure where not installed in a sign.
Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located in attics and soffits, provided there is an access door at least 900 mm × 562.5 mm (36 in. × 221/2 in.) and a passageway of at least 900 mm (3 ft) high × 600 mm (2 ft) wide with a suitable permanent walkway at least 300 mm (12 in.) wide extending from the point of entry to each component. At least one lighting outlet containing a switch or controlled by a wall switch shall be installed in such spaces. At least one point of control shall be at the usual point of entry to these spaces. The lighting outlet shall be provided at or near the equipment requiring servicing.
Ballasts, transformers, electronic power supplies, and Class 2 power sources shall be permitted to be located above suspended ceilings, provided that their enclosures are securely fastened in place and not dependent on the suspended-ceiling grid for support. Ballasts, transformers, and electronic power supplies installed in suspended ceilings shall not be connected to the branch circuit by flexible cord.
Ballasts shall be identified for the use and shall be listed.
Transformers and electronic power supplies shall be identified for the use and shall be listed.
Transformers and electronic power supplies other than the following shall have secondary-circuit ground-fault protection:
  1. Transformers with isolated ungrounded secondaries and with a maximum open circuit voltage of 7500 volts or less
  2. Transformers with integral porcelain or glass secondary housing for the neon tubing and requiring no field wiring of the secondary circuit
Secondary-circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. The voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts, under any load condition.
Transformers and electronic power supplies shall have a secondary-circuit current rating of not more than 300 mA.
Secondary circuit outputs shall not be connected in parallel or in series.
Transformers and electronic power supplies that are equipped with secondary-circuit ground-fault protection shall be so marked.
Class 2 transformers, power supplies, and power sources shall comply with the requirements of Class 2 circuits and 600.24(A), (B), (C), and (D).
Class 2 power supplies and power sources shall be listed for use with electric signs and outline lighting systems or shall be a component in a listed electric sign.
Metal parts of Class 2 power supplies and power sources shall be grounded by connecting to the equipment grounding conductor.
Conductors and equipment on the supply side of the power source shall be installed in accordance with the appropriate requirements of Chapter 3.
Secondary wiring on the load side of a Class 2 power source shall comply with 600.12(C) and 600.33.

600.25 Connections

AMENDMENT
This section has been amended at the state or city level.
Where signs are connected to previously installed branch circuits, the electrical contractor connecting the sign will be held responsible for the condition of the branch circuit. Connections shall not be made unless the branch circuit referred to is of sufficient capacity, in good condition, and in compliance with this Code. Signs may be connected to existing interior lighting circuits (except circuits feeding show windows) provided the combined load on the circuit does not exceed 1440 volt-amperes.

All outside wiring for signs shall be installed in rigid metal conduit, intermediate metal conduit, or electrical metallic tubing which shall be made waterproof; provided, however, for swinging signs the conduit or electrical metallic tubing shall terminate at the level of the crane within 914 mm (3 ft) of the sign and flexible conduit or other approved means shall be used to complete the connection. The flexible conduit shall have a drip loop and be arranged as not to bring moisture into the sign.

Sign branch circuits shall be installed so that the load connected shall in no case be more than 80% of the 15- or 20-ampere branch circuit overcurrent protective device.

Branch circuit conductors for each section of attraction board signs shall be routed to the distributing center of the section in rigid metal conduit, intermediate metal conduit or electrical metallic tubing.

600.26 Floodlights, Spotlights, and Flashing Lights

AMENDMENT
This section has been amended at the state or city level.
No floodlight or spotlight shall be installed in or on any sign in such a manner as to be detrimental to automobile or street traffic. The use of the colors, green, red, or amber is restricted to those signs where the use of such colors does not create a traffic hazard. Under no conditions shall flashing lights be used on a sign where they can be construed as traffic regulation or judged to be distracting to motor vehicle traffic.

600.27 Detailed Drawings

AMENDMENT
This section has been amended at the state or city level.
Detailed drawings shall be submitted with all sign permit applications. Each drawing shall contain the following information:
  1. Test laboratory listing number
  2. Manufacturers name or trademark
  3. Size in feet and inches
  4. Weight in pounds
  5. Volt-ampere load
  6. Branch circuit(s) required
  7. Scaled graphical drawing of sign
  8. Elevation showing the location of sign
  9. Engineered drawing number (where required in Section 600.28)
Informational Note: See Chapter 13-20, Article XIII, of the Chicago Building Code.

600.28 Engineered Drawings Required

AMENDMENT
This section has been amended at the state or city level.
Drawings prepared by an architect or structural engineer, licensed to practice in the State of Illinois, and bearing the seal of the architect or engineer are required for and shall be presented with the applications for permits for the erection or alteration of signs which fall into the following categories:
  1. Signs requiring a roof structure which extends more than 3.66 m (12 ft) from the roof to the top of the structure
  2. Signs requiring a roof structure if any face of the sign exceeds 5.57 m2 (60 ft2) in area
  3. Signs held by diverging guys or supports at angles less than 45 degrees with the sign (4) signs which exceed 91 kg (200 lb) in weight
  4. Projecting signs with any face which exceeds 9.3 m2 (100 ft2) in area
  5. Projecting signs having more than 50% of the vertical dimension of the sign above the roof line and having any face that exceeds 5.57 m2 (60 ft2) in area
  6. Projecting signs supported by roof structures
  7. Signs erected entirely above the roof of a building
  8. Signs supported from the ground by independent structure(s) with a top which is more than 7.32 m (24 ft) above the level of the adjoining street or surrounding grade
  9. Installation of new sign boxes or channel letters
  10. Exterior signs not made of a solid material or substance, including but not limited to paper, fabric, cloth, vinyl or similar flexible material or substance which (i) exceed 9.3 m2(100 ft2) in area or which are 7.32 m (24 ft) or more above grade and (ii) are secured to a building by means of brackets, channels, cables, hooks, nails, screws, straps, cords or other means other than a painted wall sign
  11. Where, in the opinion of the Building Department, the erection or alteration of a sign poses an unusual hazard or is not covered by this Code.

Part II Field-Installed Skeleton Tubing, Outline Lighting, and Secondary Wiring

Part II of this article shall apply to all of the following:
  1. Field-installed skeleton tubing
  2. Field-installed secondary circuits
  3. Outline lighting

These requirements shall be in addition to the requirements of Part I.

Conductors shall be installed using any wiring method included in Chapter 3 suitable for the conditions.
Conductors shall be listed, insulated, and not smaller than 18 AWG.
The number of conductors in a raceway shall be in accordance with Table 1 of Chapter 9.
Conductors shall be installed so they are not subject to physical damage.
Bushings shall be used to protect wires passing through an opening in metal.
Conductors shall be installed in rigid metal conduit, intermediate metal conduit, liquidtight flexible nonmetallic conduit, flexible metal conduit, liquidtight flexible metal conduit, electrical metallic tubing, metal enclosures; on insulators in metal raceways; or in other equipment listed for use with neon secondary circuits over 1000 volts.
Conduit or tubing shall contain only one conductor.
Conduit or tubing shall be a minimum of metric designator 16 (trade size 1/2).
Other than at the location of connection to a metal enclosure or sign body, nonmetallic conduit or flexible nonmetallic conduit shall be spaced no less than 38 mm (11/2 in.) from grounded or bonded parts when the conduit contains a conductor operating at 100 Hz or less, and shall be spaced no less than 45 mm (13/4 in.) from grounded or bonded parts when the conduit contains a conductor operating at more than 100 Hz.
Metal parts of a building shall not be permitted as a secondary return conductor or an equipment grounding conductor.
Conductors shall be insulated, listed as gas tube sign and ignition cable type GTO, rated for 5, 10, or 15 kV, not smaller than 18 AWG, and have a minimum temperature rating of 105°C (221°F).
Conductors shall be so installed that they are not subject to physical damage.
Sharp bends in insulated conductors shall be avoided.
Secondary conductors shall be separated from each other and from all objects other than insulators or neon tubing by a spacing of not less than 38 mm (11/2 in.). GTO cable installed in metal conduit or tubing shall not require spacing between the cable insulation and the conduit or tubing.
Insulators and bushings for conductors shall be listed for use with neon secondary circuits over 1000 volts.
The insulation on all conductors shall extend not less than 65 mm (21/2 in.) beyond the metal conduit or tubing.
Conductors shall be permitted to run between the ends of neon tubing or to the secondary circuit midpoint return of listed transformers or listed electronic power supplies and provided with terminals or leads at the midpoint.
Equipment having an open circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies.
The length of secondary circuit conductors from a high-voltage terminal or lead of a transformer or electronic power supply to the first neon tube electrode shall not exceed the following:
  1. 6 m (20 ft) where installed in metal conduit or tubing
  2. 15 m (50 ft) where installed in nonmetallic conduit
All other sections of secondary circuit conductor in a neon tube circuit shall be as short as practicable.
Splices in high-voltage secondary circuit conductors shall be made in listed enclosures rated over 1000 volts. Splice enclosures shall be accessible after installation and listed for the location where they are installed.
The wiring methods and materials used shall be in accordance with the sign manufacturer's installation instructions using any applicable wiring methods from Chapter 3, Wiring Methods, and the requirements for Class 2 circuits contained in 600.12(C), 600.24, and 600.33(A), (B), (C), and (D).
Class 2 cable listed for the application that complies with Table 600.33(A)(1) or Table 600.33(A)(2) for substitutions shall be installed on the load side of the Class 2 power source. The conductors shall have an ampacity not less than the load to be supplied and shall not be sized smaller than 18 AWG.

Table 600.33(A)(1)
Applications of Power Limited Cable in Signs and Outline Lighting

Location CL2 CL3 CL2R CL3R CL2P CL3P PLTC
Non-concealed spaces inside buildings Y Y Y Y Y Y Y
Concealed spaces inside buildings that are not used as plenums or risers Y Y Y Y Y Y Y
Environmental air spaces plenums- or risers N N N N Y Y N
Wet locations N N N N N N Y
Y = Permitted. N = Not Permitted.


Table 600.33(A)(2)
Class 2 Cable Substitutions

Cable Type Permitted Substitutions
CL3P CMP
CL2P CMP, CL3P
CL3R CMP, CL3P, CMR
CL2R CMP, CL3P, CL2P, CMR, CL3R
CL3 CMP, CL3P, CMR, CL3R, CMG, CM, PLTC
CL2 CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3
CL3X CMP, CL3P, CMR, CL3R, CMG, CM, PLTC, CL3, CMX
CL2X CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3, CL2, CMX, CL3X
CL2 or CL3, PLTC, or any listed applicable cable for general use shall be installed within and on buildings or structures.
In other locations, any listed applicable cable permitted in 600.33(A)(1), (A)(2), (A)(3), and (A)(4) and Table 600.33(A)(1) and (A)(2) shall be permitted to be used as follows:
  1. CL2P or CL3P — Ducts, plenums, or other spaces used for environmental air
  2. CL2R or CL3R — Vertical shafts and risers
  3. Substitutions from Table 600.33(A)(2)
Class 2 cable used in a wet location shall be listed and marked suitable for use in a wet location.
Class 2 cable exposed to sunlight shall be listed and marked sunlight resistant suitable for outdoor use.
Secondary wiring shall be installed in accordance with (B)(1) and (B)(2).
  1. Wiring shall be installed and supported in a neat and workmanlike manner. Cables and conductors installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable is not damaged by normal building use. The cable shall be supported and secured at intervals not exceeding 1.8 m (6 ft). Such cables shall be supported by straps, staples, hangers, cable ties, or similar fittings designed and installed so as not to damage the cable. The installation shall also comply with 300.4(D).
  2. Connections in cable and conductors shall be made with listed insulating devices and be accessible after installation. Where made in a wall, connections shall be enclosed in a listed box.
Where subject to physical damage, the conductors shall be protected and installed in accordance with 300.4.
Grounding and bonding shall be in accordance with 600.7.
All field wiring of components and subassemblies for an off-grid stand-alone, on-grid interactive, or non-grid interactive PV installation shall be installed in accordance with Article 690, as applicable, 600.34, and the PV powered sign installation instructions.
Inverters, motor generators, PV modules, PV panels, ac PV modules, dc combiners, dc-ac converters, and charge controllers intended for use in PV powered sign systems shall be listed for PV application.
Wiring from a photovoltaic panel or wiring external to the PV sign body shall be:
  1. Listed, labeled, and suitable for photovoltaic applications
  2. Routed to closely follow the sign body or enclosure
  3. As short as possible and secured at intervals not exceeding 0.91 m (3 ft)
  4. Protected where subject to physical damage
Flexible cords and cables shall comply with Article 400 and be identified as extra hard usage, rated for outdoor use, and water and sunlight resistant.
Grounding a PV powered sign shall comply with Article 690, Part V and 600.7.
The disconnecting means for a PV powered sign shall comply with Article 690, Part III and 600.6.
Battery compartments shall require a tool to open.
The length and design of the tubing shall not cause a continuous overcurrent beyond the design loading of the transformer or electronic power supply.
Tubing shall be supported by listed tube supports. The neon tubing shall be supported within 150 mm (6 in.) from the electrode connection.
A spacing of not less than 6 mm (1/4 in.) shall be maintained between the tubing and the nearest surface, other than its support.
Field-installed skeleton tubing shall not be subject to physical damage. Where the tubing is readily accessible to other than qualified persons, field-installed skeleton tubing shall be provided with suitable guards or protected by other approved means.
Where the high-voltage secondary circuit conductors emerge from the wiring methods specified in 600.32(A), they shall be enclosed in a listed assembly.
Terminals of the electrode shall not be accessible to unqualified persons.
Connections shall be made by use of a connection device, twisting of the wires together, or use of an electrode receptacle. Connections shall be electrically and mechanically secure and shall be in an enclosure listed for the purpose.
Neon secondary conductor(s) shall be supported not more than 150 mm (6 in.) from the electrode connection to the tubing.
Electrode receptacles shall be listed.
Where electrodes penetrate an enclosure, bushings listed for the purpose shall be used unless receptacles are provided.
A listed cap shall be used to close the opening between neon tubing and a receptacle where the receptacle penetrates a building. Where a bushing or neon tubing penetrates a building, the opening between neon tubing and the bushing shall be sealed.
Electrode enclosures shall be listed.
Electrode enclosures that are listed, labeled, and identified for use in dry, damp, or wet locations shall be permitted to be installed and used in such locations.
Electrode enclosures installed in damp and wet locations shall be specifically listed, labeled, and identified for use in such locations.

Informational Note: See 110.3(B) covering installation and use of electrical equipment.

600.43 Switches on Doors

AMENDMENT
This section has been amended at the state or city level.
Doors or covers giving access to uninsulated parts of signs, or outline lighting systems exceeding 600 volts nominal, and accessible to the general public, shall either be provided with interlock switches which, on the opening of the doors or covers, disconnect the primary circuit, or shall be so fastened that the use of other than ordinary tools will be necessary to open them.

600.44 Fixed Outline Lighting and Skeleton-Type Signs for Interior Use

AMENDMENT
This section has been amended at the state or city level.

(A) Tube Support

AMENDMENT
This section has been amended at the state or city level.
Gas tubing shall be supported independently of the conductors by means of insulators of noncombustible, non-absorptive materials such as glass, or porcelain or by suspensions from suitable wires or chains.

(B) Transformers

AMENDMENT
This section has been amended at the state or city level.
Transformers shall be installed in metal enclosures and as near as practicable to the gas tubing system.

(C) Supply Conductors

AMENDMENT
This section has been amended at the state or city level.
The supply conductors for the transformers shall be enclosed in grounded metal raceway.

(D) High-Tension Conductors

AMENDMENT
This section has been amended at the state or city level.
High-tension conductors shall be insulated for the voltage of the circuit and shall be enclosed in an approved raceway.
Exception: Conductors not exceeding 1.22 m (4 ft) in length between as tubing and adjacent metal enclosures shall be permitted to be enclosed in continuous glass or other insulating sleeves.

600.45 Window-Type Gas Tube Sign for Show Windows and Interior Use

AMENDMENT
This section has been amended at the state or city level.
This section shall apply to the installation and use of window-type gas tube signs.

(A) Location

AMENDMENT
This section has been amended at the state or city level.
Window gas tube signs shall be for indoor use only.

(B) Transformer

AMENDMENT
This section has been amended at the state or city level.
The transformer shall be in a metal enclosure.

(C) Supply Conductors

AMENDMENT
This section has been amended at the state or city level.
Supply conductors shall consist of hard or extra-hard usage-type cord containing an equipment grounding conductor. The cord shall not exceed 1.8 m (6 ft) in length.

(D) High-Voltage Conductors

AMENDMENT
This section has been amended at the state or city level.
High-voltage conductors shall be as short as practicable, but not more than 1.8 m (6 ft) long and shall be located where not subject to mechanical injury, and shall be insulated for the voltage of the circuit and be protected by continuous glass or other insulating sleeves or tubing.

(E) Grounding

AMENDMENT
This section has been amended at the state or city level.
Transformers and attached noncurrent-carrying metal parts shall be grounded in accordance with Article 250.

(F) Support

AMENDMENT
This section has been amended at the state or city level.
Window-type indoor signs shall be held in place by not more than two open hooks attached to the transformer case.

(G) Permit

AMENDMENT
This section has been amended at the state or city level.
Window-type indoor signs shall be installed only under the authority of a permit issued to an electrical contractor.

600.46 Supports

AMENDMENT
This section has been amended at the state or city level.
Any sign or device covered by Article 600 Part II shall be supported by approved fastening means as described in other sections of this Code.

600.47 Receptacles

AMENDMENT
This section has been amended at the state or city level.
No receptacles shall be installed in any sign or device covered by this section of the chapter.

600.48 Modular Signs

AMENDMENT
This section has been amended at the state or city level.
Where a sign is made up of several pieces the wiring to and between such pieces shall be enclosed in a metal raceway unless specifically approved by special permission.

600.49 Length of Cord

AMENDMENT
This section has been amended at the state or city level.
Where flexible cord is used as the method of supplying current to any device or sign covered by this section of the chapter, such cord shall not exceed 1.8 m (6 ft) in length. All such cords shall be approved three conductors and shall be equipped with a ground-type plug.

600.50 Voltage

AMENDMENT
This section has been amended at the state or city level.
In no case shall primary voltage to any sign or device covered by Article 600 Part II exceed 150 volts between conductors.

Part III 600 Volts, Nominal, or Less

AMENDMENT
This section has been amended at the state or city level.

600.60 Installation of Conductors

AMENDMENT
This section has been amended at the state or city level.

(A) Wiring Method

AMENDMENT
This section has been amended at the state or city level.
Conductors shall be installed in rigid or flexible metal conduit, intermediate metal conduit, electrical metallic tubing, mineral-insulated metal-sheathed cable, and metal poles complying with all requirements of 410.30(B). Aerial feeders to signs shall not be permitted.

(B) Insulation and Size

AMENDMENT
This section has been amended at the state or city level.
Conductors shall be of a type listed for the purpose and shall not be smaller than 14 AWG.
Exception No. 1: Conductors not smaller than 18 AWG of a type listed in Table 402.3 shall be permitted:
  1. As short leads permanently attached to lampholders or electric-discharge ballasts.
  2. As leads not more than 2.44 m (8 ft) long permanently attached to electric-discharge lampholders or electric-discharge ballasts if the leads are enclosed in wiring channels.
  3. For signs with multiple incandescent lamps requiring one conductor from a control to one or more lamps whose total load does not exceed 250 watts, if in an approve cable assembly of two or more conductors.
Exception No. 2: Conductors not smaller than 20 AWG shall be permitted as short leads permanently attached to synchronous motors.

(C) Exposed to Weather

AMENDMENT
This section has been amended at the state or city level.
Conductors in rigid conduit, electrical metallic tubing, flexible metal conduit, or in metal trough, raceways, or enclosures, exposed to the weather shall be of a type listed in 310.10(C).

(D) Number of Conductors in Raceway

AMENDMENT
This section has been amended at the state or city level.
The number of conductors in a raceway for sign fixtures shall be in accordance with Article 900.

(E) Conductors Soldered to Terminals

AMENDMENT
This section has been amended at the state or city level.
Where the conductors are fastened to lampholders other than of the pin type, they shall be soldered to the terminals or made with wire connectors, and the exposed parts of conductors and terminals shall be treated to prevent corrosion. Where the conductors are fastened to pin-type lampholders that protect the terminals from the entrance of water and that have been found acceptable for sign use, the conductors shall be of the stranded type but shall not be required to be soldered to the terminals.

Part IV Hanging Flat and Projecting Signs

AMENDMENT
This section has been amended at the state or city level.

600.70 Support

AMENDMENT
This section has been amended at the state or city level.

(A) Flat Signs

AMENDMENT
This section has been amended at the state or city level.
Flat signs shall be anchored below roof line except that additional support other than chain may be provided over parapet to roof.

(B) Projecting Signs

AMENDMENT
This section has been amended at the state or city level.
Projecting signs exceeding 9.3 m2 (100 ft2) in area of one face shall be rigidly hung on beams. Separate projecting signs so hung as to appear as one sign shall be rigidly hung on beams if the total area of all faces on one side of the sign exceeds 9.3 m2 (100 ft2).

600.71 Bracing

AMENDMENT
This section has been amended at the state or city level.

(A) Chain, Side Guys, and Rigid Brace Supports

AMENDMENT
This section has been amended at the state or city level.
All projecting signs shall have standard chain supports and fastenings to the building as shown in Table 600.71(A). Fastenings shall be so installed that attached supports or guys make an angle of 45° or greater with the sign. Where machine or lag screws enter strong structures, anchorage will be considered as equivalent to bolt throughout the wall. Expansion bolts shall be not less than 10 mm (3/8 in.) in diameter and shall enter through brick or stone walls not less than 64 mm (2-1/2 in.). Lag bolts in solid woodwork shall be not less than 10 mm (3/8 in.) in diameter and shall enter woodwork not less than 76 mm (3 in.).

Table 600.71(A)
Support Chains
Weight of Sign (lb) Number of Chains Trade Size of Chains Fastening to Wall
Up to 75 1 4/0 Two expansion bolts per chain
76 to 150 2 4/0 Two expansion bolts per chain
151 to 400 2 8/0 One expansion bolts per chain
401 to 1,000 2 10/0 One expansion bolts per chain

(B) Supporting Chain

AMENDMENT
This section has been amended at the state or city level.
No supporting chain shall be attached back of the center of gravity of the sign, except in the case of the rear supports of vertical signs.

(C) Lift Chain

AMENDMENT
This section has been amended at the state or city level.
Each lift chain shall be capable of carrying the sign alone. Fastenings for signs, supports or guys shall not be attached to, or rest on, parapet walls and shall be not less than 203 mm (8 in.) from any corner of the building.

(D) Projecting Signs

AMENDMENT
This section has been amended at the state or city level.
All projecting signs shall have standard chain side guys or rigid brace supports as shown in Tables 600.71(D)(1), (2), or (3).

Table 600.71 (D)(1)
Number and Size of Chain Guys for Each Side of Guy
Height in Feet   Horizontal Length of Sign in Feet
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 No.
Size
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2 No.
Size
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
3 No.
Size
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
1
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
3
4/0
3
4/0
3
4/0
3
4/0
3
4/0
4 No.
Size
1
4/0
1
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
3
4/0
3
4/0
3
4/0
4
4/0
4
4/0
5 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
4
4/0
4
4/0
4
4/0
4
4/0
4
4/0
6 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
4
4/0
4
4/0
4
4/0
3
8/0
3
8/0
3
8/0
3
8/0
7 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
4
4/0
4
4/0
3
8/0
3
8/0
3
8/0
3
8/0
3
8/0
8 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
4
4/0
4
4/0
3
8/0
3
8/0
3
8/0
3
8/0
4
8/0
4
8/0
9 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
3
8/0
3
8/0
3
8/0
3
8/0
3
8/0
4
8/0
4
8/0
4
8/0
10 No.
Size
2
4/0
2
4/0
2
4/0
2
4/0
3
4/0
3
4/0
4
4/0
4
4/0
3
8/0
3
8/0
3
8/0
4
8/0
4
8/0
4
8/0
4
8/0
4
8/0

Table 600.71 (D)(2)
Capacity in Square Feet of Sign Surface for Pipe Braces
Trade Size
of Pipe (in.)
Outside Diameter
of Pipe (in.)
Length of Brace in Feet
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1/2 .082 38 22 15                            
3/4 1.03     40 28 15                        
1 1.29         54 33 18                    
1 1/4 1.65             70 53 37 21              
1 1/2 1.89                   56 42 23          
2 2.36                         78 60 25    
2 1/2 2.86                               95 48

Table 600.17 (D)(3)
Capacity in Square Feet of Sign Surface for Angle Iron Braces
Dimension of Angle Iron in Inches Length of Brace In Feet
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 x 1 x 3/16 12                            
11/4 x 11/4 x 3/16 37 20                          
11/2 x 11/2 x 3/16 57 41 25 8                      
13/4 x 13/4 x 3/16     61 28 12                    
2 x 2 x 3/16       49 32 16                  
21/2 x 21/2 x 3/16           58 41 25              
3 x 3 x 1/4                 92 56 24        
31/2 x 31/2 x 1/4                       77 42 9  
4 x 4 x 1/4                             59
Note 1. There shall not be more than 40 ft2 to one brace.
Note 2. Pipe braces shall not have joints near center.
Note 3. The ends of the pipe shall be closed by welding or by the use of an approved fitting.

(E) Hinged Projecting Signs

AMENDMENT
This section has been amended at the state or city level.
Projecting signs with chain or rigid pipe side guys shall be hinged at the building so that, should the sign swing on account of loosening of the side guys, no undue strain will be placed on the supporting bolts. Where the length of the hanger iron projecting from the sign frame is of a length that will not permit hinging due to the interference of the sign drum with the supporting wall said wall connections shall be made by means of two anchor bolts in the wall for each hanger iron, and the wall plates shall be fastened with not less than two bolts to the iron frame of the sign.

(F) Side Guy Chain

AMENDMENT
This section has been amended at the state or city level.
Each chain used for the support of for the side guy of sign shall have an independent attachment to the building or supporting structure, and shall make an angle of 45° or greater with the sign.

(G) Supporting Chains

AMENDMENT
This section has been amended at the state or city level.
Where supporting chains are attached to bolts through the wall such bolts shall be not less than 16 mm (5/8 in.) in diameter. The bolt shall be anchored by a washer plate of not less than 610 mm2(24 in.2) of surface and of not less than 3.2 mm (1/8 in.) thick.

(H) Window Frames or Sills

AMENDMENT
This section has been amended at the state or city level.
Chains or signs shall not be fastened to window frames or sills.

(I) Turnbuckle

AMENDMENT
This section has been amended at the state or city level.
A turnbuckle shall be provided for all supporting chains and side guys. Turnbuckles shall have a breaking strength equivalent to that of the chain to which they are attached and shall be not less than 4.8 mm (3/16 in.).

(J) Split Links

AMENDMENT
This section has been amended at the state or city level.
Split links used for connections of chains shall be of standard design and shall have a breaking strength at least equivalent to that of the chain to which they are attached.

(K) Corrosion Protection

AMENDMENT
This section has been amended at the state or city level.
All chains, turnbuckles, split links, bolts and screws, and all other devices which support or form part of the support of a sign shall be galvanized or otherwise suitably protected from corrosion in some approved manner.

(L) Saddling

AMENDMENT
This section has been amended at the state or city level.
Where necessary to use a saddle for the fastening of a building iron, rigid construction shall be used. Chains will not be approved.

(M) Machine Screws

AMENDMENT
This section has been amended at the state or city level.
Machine screws in iron fronts shall be not less than 1/2 in. in diameter and shall pass through iron work.

(N) Wooden Bays

AMENDMENT
This section has been amended at the state or city level.
Projecting signs, lift chains or guys shall not be attached to wooden bays.

600.80 Swinging Signs

AMENDMENT
This section has been amended at the state or city level.
Swinging signs shall be supported by a pipe crane, or the equivalent, as shown in Table 600.80.

Swinging signs having a length of more than 2.44 m (8 ft) shall have not less than three hanging irons. Not less than two bolts shall be used to fasten strap to hanging iron. All cranes shall be further supported by an additional lift chain not more than 610 mm (2 ft) from building. No crane shall be erected higher than 8.53 m (28 ft) above the public way.
Table 600.80
Swinging Sign Supports
Weight Pipe Size
0 — 75 lb 1 in.
76 — 150 lb 1-1/4 in.
151 — 300 lb 1-1/2 in.
301 — 450 lb 2 in.
451 — 1,000 lb 2-1/2 in.

600.90 Supporting Poles or Posts

AMENDMENT
This section has been amended at the state or city level.
Supports for signs shall be either steel beams, round steel pipe sections or square steel (hollow) sections.

(A) Single Supporting Member

AMENDMENT
This section has been amended at the state or city level.
Signs which have a single supporting member shall be restricted to round steel pipe sections or square steel sections. The sections may consist of a fabricated and welded assembly, provided the welding is performed by a certified welder.

(B) Minimum Support

AMENDMENT
This section has been amended at the state or city level.
The minimum requirements for the support of signs shall be based upon a combined torsional and bending moment for a wind pressure of 1440 Pa (30 psf) and sign weight involved, using a maximum fiber stress of 138,000 kPa (20,000 psi).

(C) Drawing

AMENDMENT
This section has been amended at the state or city level.
A sketch, or engineer's drawings where required by this Code, shall accompany each permit application. The sketch or drawing shall show complete and detailed information of the construction and installation of the sign.

(D) Design Values

AMENDMENT
This section has been amended at the state or city level.
The values listed in Tables 600.90(A) and (B) are minimum and are based upon an elevation of not more than 3.7 m (12 ft) above the surrounding grade or ground level to the bottom of the sign. The dimensions of the sign shall be such that a ratio between the two dimensions of the sign shall not exceed two to one. The distance between the center line of the support and the sign edge shall not exceed 750 mm (30 in.) for projecting signs. Deviation from the provisions of this section may be permitted by special permission, provided drawings are submitted from a structural engineer licensed to practice in the State of Illinois. Such drawings must attest to the fact that the proposed installation is equal to or greater than the standard required by this section.

Table 600.90(D)(1)
Minimum Support Size for Projecting Signs
Area of One
Face in ft2
Round Pipe in Inches Square Tubular Section in Inches
Up to 10 4 (.237 wall) 3 x 3 x 1/4
11 to 20 6 (.280 wall) 4 x 4 x 3/16
21 to 30 8 (.250 wall) 5 x 5 x 1/4
31 to 40 8 (.250 wall) 6 x 6 x 1/4
41 to 50 8 (.322 wall) 7 x 7 x 1/4
51 to 60 10 (.250 wall) 8 x 8 x 1/4
61 to 70 10 (.365 wall) 8 x 8 x 1/4
71 to 75 10 (.365 wall) 10 x 10 x 1/4

Table 600.90(D)(2)
Minimum Support Size for Concentrically Mounted Signs
Area of One
Face in ft2
Round Pipe in Inches Square Tubular Section in Inches
Up to 10 4 (.237 wall) 3 x 3 x 1/4
11 to 20 5 (.258 wall) 4 x 4 x 3/16
21 to 30 6 (.280 wall) 5 x 5 x 1/4
31 to 40 8 (.280 wall) 6 x 6 x 1/4
41 to 50 8 (.322 wall) 7 x 7 x 1/4
51 to 60 10 (.250 wall) 8 x 8 x 1/4
61 to 70 10 (.368 wall) 8 x 8 x 1/4
71 to 75 10 (.365 wall) 8 x 8 x 1/4

600.100 Obstructions

AMENDMENT
This section has been amended at the state or city level.

(A) Obstructions

AMENDMENT
This section has been amended at the state or city level.
Signs shall not obstruct or be attached to any part of a fire escape, and where a sign is hung near a fire escape, it shall be arranged to swing away from such fire escape.

(B) Clearance From Conductors

AMENDMENT
This section has been amended at the state or city level.
Signs shall be installed so that a clearance of not less than 900 mm (3 ft) is maintained between any wire of a high potential circuit and the sign, sign support, or sign guy. Similar clearance of not less than 300 mm (12 in.) shall be maintained between any other municipal or public utility wire. Sign hangers shall make arrangements to have wires rerouted when necessary before the sign is hung.

(C) Windows

AMENDMENT
This section has been amended at the state or city level.
Signs covering windows used for required natural light or required natural ventilation will not be approved without special permission.

600.110 Roof Structures

AMENDMENT
This section has been amended at the state or city level.
Roof structures shall be installed when the required 45° angle of the lift chain cannot be made of the building wall. Roof structures less than 3.7 m (12 ft) shall conform to Figure 600.110.

Where the height does not exceed 3.7 m (12 ft) for signs up to 3.7 m2 (40 ft2) in area the main angles shall be 2" x 2" x 1/4" and the intermediate angles shall be 1-1/2" x 1-1/2" x 3/16"; for signs over 3.7 m2 (40 ft2) in area the main angles shall be 2-1/2" x 2-1/2" x 1/4" and the intermediate angles shall be 2" x 2"x 1/4". Roof structures over 3.7 m (12 ft) high or more than 5.6 m2 (60 ft2) shall have engineer's drawings required by 600.28.

Figure 600.110 Roof Structures

600.120 Catwalks and Ladders

AMENDMENT
This section has been amended at the state or city level.

(A) Catwalks

AMENDMENT
This section has been amended at the state or city level.
Catwalks for maintenance purposes on signs and sign structures shall be constructed of metal.

(B) Ladder on Sign Structures

AMENDMENT
This section has been amended at the state or city level.
Ladder on sign structures shall be at least 375 mm (15 in.) wide. Ladders on signs shall be metal and shall be not less than 250 mm (10 in.) wide. Horizontal projecting signs, the bottoms of which are more than 8.5 m (28 ft) above the public way, shall be provided with catwalks and handrails.

(C) Horizontal Flat Signs

AMENDMENT
This section has been amended at the state or city level.
Horizontal flat signs, the bottoms of which are more than 8.5 m (28 ft) above the public way shall be provided with catwalks and handrails unless signs can be maintained by means other than ladders supported from the way.

(D) Vertical Signs

AMENDMENT
This section has been amended at the state or city level.
Vertical signs, the bottoms of which are more than 8.5 m (28 ft) above the public way, or with a vertical dimension of more than 7.5 m (25 ft), shall have ladders the full vertical distance of the sign. In addition, all signs in the above category which are more than 1.2 m (4 ft) wide shall be provided with a steel structure at the top of the sign for maintenance purposes.

Article 604 Manufactured Wiring Systems

AMENDMENT
This section has been amended at the state or city level.

604.1 Scope

AMENDMENT
This section has been amended at the state or city level.

604.2 Definition

AMENDMENT
This section has been amended at the state or city level.

604.6 Listing Requirements

AMENDMENT
This section has been amended at the state or city level.

604.7 Installation

AMENDMENT
This section has been amended at the state or city level.

604.10 Uses Permitted

AMENDMENT
This section has been amended at the state or city level.

604.12 Uses Not Permitted

AMENDMENT
This section has been amended at the state or city level.

604.100 Construction

AMENDMENT
This section has been amended at the state or city level.

(A) Cable or Conduit Types

AMENDMENT
This section has been amended at the state or city level.

(1) Cables

AMENDMENT
This section has been amended at the state or city level.

(2) Conduits

AMENDMENT
This section has been amended at the state or city level.

(3) Flexible Cord

AMENDMENT
This section has been amended at the state or city level.

(4) Busways

AMENDMENT
This section has been amended at the state or city level.

(5) Raceway

AMENDMENT
This section has been amended at the state or city level.

(B) Marking

AMENDMENT
This section has been amended at the state or city level.

(C) Receptacles and Connectors

AMENDMENT
This section has been amended at the state or city level.

(D) Other Component Parts

AMENDMENT
This section has been amended at the state or city level.
This article covers electrical equipment, lighting accessories, and wiring systems used to connect, contained within, or installed on office furnishings.

Office Furnishing. Cubicle panels, partitions, study carrels, workstations, desks, shelving systems, and storage units that may be mechanically and electrically interconnected to form an office furnishing system.

605.3 General

AMENDMENT
This section has been amended at the state or city level.
Wiring systems shall be identified as suitable for providing power for lighting accessories and utilization equipment used within office furnishings. A wired partition may extend from floor to ceiling but shall not penetrate the ceiling. All internal wiring to the partitions shall be installed with a recognized wiring method. Where tight turns are encountered, 3/8" or 1/2" trade size flexible metal conduit may be installed. Where flexible metallic conduit is installed, a separate green grounding conductor of the wire type, shall be installed in the flexible metal conduit, and shall also bond all of the metal boxes together.
Exception: Where bends of a radius less than that available with 3/8" or 1/2" trade size flexible metal conduit, listed and labeled super flexible metallic conduit with nylon jackets conductors maybe used.
These assemblies shall be installed and used only as provided for by this article.
Where used in hazardous (classified) locations, these assemblies shall comply with Articles 500 through 517 in addition to this article.
All conductors and connections shall be contained within wiring channels of metal or other material identified as suitable for the conditions of use. Wiring channels shall be free of projections or other conditions that might damage conductor insulation.

605.5 Office Furnishing Interconnections

AMENDMENT
This section has been amended at the state or city level.
The electrical connection between office furnishings shall be a flexible metal conduit identified for use with office furnishings or, for office furnishings meeting the requirements of 605.9, shall be permitted to be installed using flexible cord provided that all of the following conditions are met:
  1. The cord is extra-hard usage type with 12 AWG or larger conductors, with an insulated equipment grounding conductor.
  2. The office furnishings are mechanically contiguous.
  3. The cord is not longer than necessary for maximum positioning of the office furnishing but is in no case to exceed 600 mm (2 ft).
  4. The cord is terminated at an attachment plug-and-cord connector with strain relief.

605.6 Lighting AccessoriesEquipment and Utilization Equipment

AMENDMENT
This section has been amended at the state or city level.
Lighting equipment and utilization equipment shall be listed, labeled, and identified for use with office furnishings and shall comply with 605.6(A), (B) and (C).
A means for secure attachment or support shall be provided.
Where cord and plug connection is provided, it shall comply with all of the following:
  1. The cord length shall be suitable for the intended application but shall not exceed 2.7 m (9 ft) in length.
  2. The cord shall not be smaller than 18 AWG.
  3. The cord shall contain an equipment grounding conductor, except as specified in 605.6(B)(4).
  4. Cords on the load side of a listed Class 2 power source shall not be required to contain an equipment grounding conductor.
  5. The cord shall be of the hard usage type, except as specified in 605.6(B)(6).
  6. A cord provided on a listed Class 2 power source shall be of the type provided with the listed luminaire assembly or of the type specified in 725.130 and 725.127.
  7. Connection by other means shall be identified as suitable for the conditions of use.
Receptacles shall not be permitted in lighting accessories.

605.7 Fixed-Type Office Furnishings

AMENDMENT
This section has been amended at the state or city level.
Office furnishings other than those meeting the requirements of 605.9 shall be permanently connected to the building electrical system by one of the wiring methods of Chapter 3.

605.8 Freestanding-Type Office Furnishings

AMENDMENT
This section has been amended at the state or city level.

605.9 Freestanding-Type Office Furnishings, Cord- And Plug-Connected

AMENDMENT
This section has been amended at the state or city level.
Individual office furnishings or groups of individual office furnishings that are electrically connected, are mechanically contiguous, and do not exceed 9.0 m (30 ft) when assembled, and which are either sufficiently lightweight or equipped with features such as wheels to readily allow repositioning by users, shall be permitted to be connected to the building electrical system by a single flexible cord and plug, provided that the conditions of 605.9(A) through (D) are met.
The flexible power supply cord shall be extra-hard usage type with 12 AWG or larger conductors, with an insulated equipment grounding conductor, and shall not exceed 600 mm (2 ft) in length.
The receptacle(s) supplying power shall be on a separate circuit serving only the office furnishing and no other loads and shall be located not more than 300 mm (12 in.) from the office furnishing that is connected to it.
An individual office furnishing or groups of interconnected individual office furnishings shall not contain more than 13 15-ampere, 125-volt receptacles. For purposes of this requirement, a receptacle is considered (1) up to two (simplex) receptacles provided within a single enclosure and that are within 0.3 m (1 ft) of each other or (2) one duplex receptacle.
An individual office furnishing or groups of interconnected office furnishings shall not contain multiwire circuits.

Informational Note: See 210.4 for circuits supplying office furnishings in 605.7 and 605.8.

Part I General

This article covers the installation of electrical equipment and wiring used in connection with cranes, monorail hoists, hoists, and all runways.

Informational Note: For further information, see ASME B30, Safety Standards for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings.

Festoon Cable. Single- and multiple-conductor cable intended for use and installation in accordance with Article 610 where flexibility is required.

All equipment that operates in a hazardous (classified) location shall conform to Article 500.
Equipment used in locations that are hazardous because of the presence of flammable gases or vapors shall conform to Article 501.