Article 210 Branch Circuits
|Air-conditioning and refrigerating equipment||440.6, 440.31, 440.32|
|Central heating equipment other than fixed electric space-heating equipment||422.12|
|Fixed electric heating equipment for pipelines and vessels||427.4|
|Fixed electric space-heating equipment||424.3|
|Fixed outdoor electrical deicing and snow-melting equipment||426.4|
|Infrared lamp industrial heating equipment||422.48, 424.3|
|Motors, motor circuits, and controllers||430|
|Switchboards and panelboards||408.52|
Informational Note No. 1: A 3-phase, 4-wire, wye-connected power system used to supply power to nonlinear loads may necessitate that the power system design allow for the possibility of high harmonic currents on the neutral conductor.
(a) Means of Identification. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means.
(b) Posting of Identification Means. The method utilized for conductors originating within each branch-circuit panelboard or similar branch-circuit distribution equipment shall be documented in a manner that is readily available or shall be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. The label shall be of sufficient durability to withstand the environment involved and shall not be handwritten.
Exception: In existing installations where a voltage system(s) already exists and a different voltage system is being added, it shall be permissible to mark only the new system voltage. Existing unidentified systems shall not be required to be identified at each termination, connection, and splice point in compliance with 210.5(C)(1)(a) and (b). Labeling shall be required at each voltage system distribution equipment to identify that only one voltage system has been marked for a new system(s). The new system label(s) shall include the words "other unidentified systems exist on the premises. "
(a) Positive Polarity, Sizes 6 AWG or Smaller. Where the positive polarity of a dc system does not serve as the connection point for the grounded conductor, each positive ungrounded conductor shall be identified by one of the following means:
- A continuous red outer finish
- A continuous red stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or black
- Imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)
- An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray, or black
(b) Negative Polarity, Sizes 6 AWG or Smaller. Where the negative polarity of a dc system does not serve as the connection point for the grounded conductor, each negative ungrounded conductor shall be identified by one of the following means:
- A continuous black outer finish
- A continuous black stripe durably marked along the conductor's entire length on insulation of a color other than green, white, gray, or red
- Imprinted minus signs (—) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red and repeated at intervals not exceeding 610 mm (24 in.) in accordance with 310.8(B)
- An approved permanent marking means such as sleeving or shrink-tubing that is suitable for the conductor size, at all termination, connection, and splice points, with imprinted minus signs (—) or the word NEGATIVE or NEG durably marked on insulation of a color other than green, white, gray, or red
- Cord-and-plug-connected loads 1440 volt-amperes, nominal, or less or less than 1/4 hp
- Electric-discharge luminaires with integral ballasts
- LED luminaires with LED drivers between the branch circuit and the lampholders
- Incandescent or LED luminaires, equipped with mediumbase or smaller screw shell lampholders, where the lampholders are supplied at 120 volts or less from the output of a stepdown autotransformer, LED driver, or other type of power supply that is an integral component of the luminaire
- Luminaires equipped with mogul-base screw shell lampholders
- Luminaires equipped with lampholders, other than the screw shell type, when used within their voltage ratings of their lampholders
- Luminaires without lampholders
- Auxiliary equipment of electric-discharge or LED-type lamps
- Luminaires converted with listed retrofit kits incorporating integral LED light sources or accepting LED lamps that also conforms with 210.6(C)(1), (C)(2), (C)(3), (C)(4), or (C)(5)
- The auxiliary equipment of electric-discharge lamps mounted in permanently installed luminaires where the luminaires are mounted in accordance with one of the following:
- Not less than a height of 6.7 m (22 ft) on poles or similar structures for the illumination of outdoor areas such as highways, roads, bridges, athletic fields, or parking lots
- Not less than a height of 5.5 m (18 ft) on other structures such as tunnels
- Cord-and-plug-connected or permanently connected utilization equipment other than luminaires
- Luminaires powered from direct-current systems where either of the following apply:
Exception No. 2 to (B), (C), and (D): For railway properties as described in 110.19.
Informational Note No. 3: See 555.9 for GFCI requirements for boat hoists.
For the purposes of this section, when determining the distance from receptacles the distance shall be measured as the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or the shortest path without passing through a window.
- Garages and also accessory buildings that have a floor located at or below grade level not intended as habitable rooms and limited to storage areas, work areas, and areas of similar use
Exception to (3): Receptacles that are not readily accessible and are supplied by a branch circuit dedicated to electric snow-melting, deicing, or pipeline and vessel heating equipment shall be permitted to be installed in accordance with 426.28 or 427.22, as applicable.
- Crawl spaces — at or below grade level
- Kitchens — where the receptacles are installed to serve the countertop surfaces
- Sinks — where receptacles are installed within 1.8 m (6 ft) from the top inside edge of the bowl of the sink
- Bathtubs or shower stalls — where receptacles are installed within 1.8 m (6 ft) of the outside edge of the bathtub or shower stall
- Laundry areas
Exception to (1) through (3), (5) through (8), and (10): Listed locking support and mounting receptacles utilized in combination with compatible attachment fittings installed for the purpose of serving a ceiling luminaire or ceiling fan shall not be required to be ground-fault circuit-interrupter protected. If a general-purpose convenience receptacle is integral to the ceiling luminaire or ceiling fan, GFCI protection shall be provided.
- Indoor damp and wet locations