- Electrical equipment and appliances: Electrical rating in volts, amperes and motor phase; identification of individual electrical components in volts, amperes or watts, motor phase; Btu/h (W) output; and required clearances.
- Absorption units: Hourly rating in Btu/h (W); minimum hourly rating for units having step or automatic modulating controls; type of fuel; type of refrigerant; cooling capacity in Btu/h (W); and required clearances.
- Fuel-burning units: Hourly rating in Btu/h (W); type of fuel approved for use with the appliance; and required clearances.
- Electric comfort heating appliances: Name and trade-mark of the manufacturer; the model number or equivalent; the electric rating in volts, ampacity and phase; Btu/h (W) output rating; individual marking for each electrical component in amperes or watts, volts and phase; required clearances from combustibles; and a seal indicating approval of the appliance by an approved agency.
Exceptions: This section shall not apply to the following appliances:
- In rooms other than those used for sleeping purposes, direct-vent appliances that obtain all combustion air directly from the outdoors and are installed in accordance with the conditions of the listing and manufacturer's instructions.
- In rooms other than those used for sleeping purposes, vented room heaters, wall furnaces, vented decorative appliances, vented gas fireplaces, vented gas fireplace heaters and decorative appliances for installation in vented solid fuel-burning fireplaces that are installed in rooms that meet the required volume criteria of Section 702.
- Appliances installed in a dedicated enclosure in which all combustion air is taken directly from the outdoors, in accordance with Section 703. Access to such enclosure shall be through a solid door, weather-stripped in accordance with the exterior door air leakage requirements of the New York City Energy Conservation Code and equipped with an approved self-closing device.
Exception: Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer's installation instructions, the conditions of the listing and the manufacturer's installation instructions shall apply.
Exception: This section shall not apply to appliance installations complying with Section 304.6.
Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impact and installed in accordance with Section 304.3 of this code and NFPA 30A.
Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impact and installed in accordance with Section 304.3.
Pipe hangers and supports that are in direct contact with piping shall be of materials that are compatible with the piping and that will not promote galvanic action.
TABLE 305.4 PIPING SUPPORT SPACINGa
|PIPING MATERIAL|| MAXIMUM |
| MAXIMUM |
|Aluminum pipe and tubing||10||15|
| Brass tubing, 11/4-inch diameter and |
| Brass tubing, 11/2-inch diameter and |
|Copper or copper-alloy pipe||12||10|
| Copper or copper-alloy tubing 11/4-inch |
diameter and smaller
| Copper or copper-alloy tubing 11/2-inch |
diameter and larger
| CPVC pipe or tubing, 1 inch and |
| CPVC pipe or tubing, 11/4-inch and |
|PB pipe or tubing|| 22/3 |
|PEX tubing|| 22/3 |
| Polypropylene (PP) pipe or tubing, |
1 inch or smaller
| 22/3 |
| Polypropylene (PP) pipe or tubing 11/4 |
inches or larger
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
Exception: This section shall not apply to replacement appliances installed in existing compartments and alcoves where the working space clearances are in accordance with the equipment or appliance manufacturer's installation instructions.
Exception: Within a dwelling unit, appliances installed in a compartment, alcove, basement or similar space shall be accessed by an opening or door and an unobstructed passageway measuring not less than 24 inches (610 mm) wide and large enough to allow removal of the largest appliance in the space, provided that a level service space of not less than 30 inches (762 mm) deep and the height of the appliance, but not less than 30 inches (762 mm), is present at the front or service side of the appliance with the door open.
- The passageway and level service space are not required where the appliance is capable of being serviced and removed through the required opening.
- Where the passageway is unobstructed and not less than 6 feet (1829 mm) high and 22 inches (559 mm) wide for its entire length, the passageway shall be not greater than 50 feet (15 250 mm) in length.
- The passageway is not required where the level service space is present when the access is open and the appliance is capable of being serviced and removed through the required opening.
- Where the passageway is unobstructed and not less than 6 feet (1829 mm) high and 22 inches (559 mm) wide for its entire length, the passageway shall not be limited in length.
Permanent ladders installed to provide the required access shall comply with the following minimum design criteria:
- The side railing shall extend above the parapet or roof edge not less than 30 inches (762 mm).
- Ladders shall have rung spacing not to exceed 12 inches (305 mm) on center.
- Ladders shall have a toe spacing not less than 7 inches (177.8 mm) deep.
- There shall be a minimum of 18 inches (457 mm) between rails.
- Rungs shall have a minimum 0.75 inch (19.1 mm) diameter and be capable of withstanding a 300-pound (136.1 kg) load.
- Where a cage, well or ladder safety device is prohibited, ladders over 20 feet (6096 mm) in height shall be provided with landing platforms for each 30 feet (9144 mm) of height. Where a cage, well or ladder safety device is not provided, ladders over 20 feet (6096 mm) in height shall be provided with landing platforms for each 20 feet (6096 mm) of height. Landings shall be capable of withstanding 100 pounds (488.2 kg/m2) per square foot. Landing dimensions shall be not less than 30 inches (762 mm) in length and not less than 24 inches (610 mm) in width. A guard rail and toeboard shall be provided on all open sides of the landing.
- Where ladder extensions are installed, the side rails of through or side-step ladder extensions shall extend 31/2 feet (1067 mm) above the parapets and landings. For through ladder extensions, the rungs shall be omitted from the extensions and shall have not less than 18 inches (457 mm) nor more than 24 inches (610 mm) of clearance between rails. For side-step or offset fixed ladder sections, at landings, the side rails and rungs shall be carried to the next regular rung beyond or above the 31/2 feet (1067 mm) minimum.
- Ladders shall be protected against corrosion.
- Catwalks installed to provide the required access shall be not less than 24 inches (610 mm) wide and shall have railings as required for service platforms.
TABLE 307.2.2 CONDENSATE DRAIN SIZING
|EQUIPMENT CAPACITY|| MINIMUM CONDENSATE |
|Up to 20 tons of refrigeration||3/4 inch|
|Over 20 tons to 40 tons of refrigeration||1 inch|
|Over 40 tons to 90 tons of refrigeration||11/4 inch|
|Over 90 tons to 125 tons of refrigeration||11/2 inch|
|Over 125 tons to 250 tons of refrigeration||2 inch|
- An auxiliary drain pan with a separate drain shall be provided under the coils on which condensation will occur. The auxiliary pan drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The pan shall have a minimum depth of 11/2 inches (38 mm), shall not be less than 3 inches (76 mm) larger than the unit or the coil dimensions in width and length and shall be constructed of corrosion-resistant material. Metallic pans shall have a minimum thickness of not less than 0.0236 inches (0.6010 mm) (No. 24 gage) for galvanized sheet metal pans, 0.0179 inches (0.4546 mm) (No. 26 gage) for stainless steel pans, or 0.0320 inches (0.8128 mm) (No. 20 gage) for aluminum pans. Nonmetallic pans shall have a minimum thickness of not less than 0.0625 inch (1.6 mm).
- A separate overflow drain line shall be connected to the drain pan provided with the equipment. Such overflow drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a higher level than the primary drain connection.
- An auxiliary drain pan without a separate drain line shall be provided under the coils on which condensate will occur. Such pan shall be equipped with a water-level detection device that will shut off the equipment served prior to overflow of the pan. The auxiliary drain pan shall be constructed in accordance with Item 1 of this section.
- A water-level detection device shall be provided that will shut off the equipment served in the event that the primary drain is blocked. The device shall be installed in the primary drain line, the overflow drain line, or in the equipment-supplied drain pan, located at a point higher than the primary drain line connection and below the overflow rim of such pan.
TABLE 308.6 CLEARANCE REDUCTION METHODSb
|TYPE OF PROTECTIVE ASSEMBLYa||REDUCED CLEARANCE WITH PROTECTION (inches)a|
| Horizontal combustible assemblies |
located above the heat source
| Horizontal combustible assemblies |
located beneath the heat source and all
vertical combustible assemblies
| Required clearance to combustibles |
without protection (inches)a
| Required clearance to combustible without |
| Galvanized sheet metal, minimum nominal thickness of |
0.0296 inch (No. 22 Gage), mounted on 1-inch glass fiber
or mineral wool batt reinforced with wire on the back, 1
inch off the combustible assembly
| Two layers of galvanized sheet metal, minimum nominal |
thickness of 0.024 inch (No. 24 Gage), having a 1-inch
airspace between layers, spaced 1 inch off the combustible
| Two layers of galvanized sheet metal, minimum nominal |
thickness of 0.024 inch (No. 24 Gage), having 1 inch of
fiberglass insulation between layers, spaced 1 inch off the
| 0.5-inch inorganic insulating board, over 1 inch of |
fiberglass or mineral wool batt, against the combustible
|3.5-inch brick wall, spaced 1 inch off the combustible wall||—||—||—||—||12||6||6||6|
|3.5-inch brick wall, against the combustible wall||—||—||—||—||24||12||6||5|
|For SI: 1 inch = 25.4 mm, °C = [(°F)-32]/1.8, 1 pound per cubic foot = 16.02 kg/m3, 1.0 Btu • in/ft2 • h • °F = 0.144 W/m2 • K.|
|a. Mineral wool and glass fiber batts (blanket or board) shall have a minimum density of 8 pounds per cubic foot and a minimum melting point of 1,500°F. Insulation material utilized as part of a clearance reduction system shall have a thermal conductivity of 1.0 Btu in./(ft2 • h • °F) or less. Insulation board shall be formed of noncombustible material.|
|b. For limitations on clearance reduction for solid fuel-burning appliances, masonry chimneys, connector pass-throughs, masonry fireplaces and kitchen ducts, see Sections 308.7 through 308.11.|
Exception: Interior spaces where the primary purpose is not associated with human comfort.