Windsor-Severence Fire Protection District
Heavy Rescue
Production Specification
SVI #774 Page 123 of 126 April 19, 2010
Wiring System Components
Only stranded copper conductors with an insulation rated for temperatures of at least 194°F (90°C) and wet locations shall
be used. Conductors in flexible cord shall be sized in accordance with Table 400.5(A) of NFPA 70. Conductors used in
conduit shall be sized in accordance with 310.15, “Ampacities for Conductors Rated 0–2000 Volts,” of NFPA 70.
Aluminum or copper-clad aluminum conductors shall not be used.
All boxes shall conform to and be mounted in accordance with Article 314, “Outlet, Device, Pull, and Junction Boxes;
Conduit Bodies; Fittings; and Manholes,” of NFPA 70. All boxes shall be accessible using ordinary hand tools. Boxes shall
not be permitted behind welded or pop-riveted panels.
The maximum number of conductors permitted in any box shall be in accordance with 314.16, “Number of Conductors in
Outlet, Device, and Junction Boxes, and Conduit Bodies,” of NFPA 70.
All wiring connections and terminations shall provide a positive mechanical and electrical connection. Connectors shall be
installed in accordance with the manufacturer’s instructions. Wire nuts or insulation displacement and insulation piercing
connectors shall not be used.
Each switch shall indicate the position of its contact points (i.e., open or closed) and shall be rated for the continuous
operation of the load being controlled. All switches shall be marked with a label indicating the function of the switch.
Circuit breakers used as switches shall be “switch rated” (SWD) or better. Switches shall simultaneously open all
associated line voltage conductors. Switching of the neutral conductor alone shall not be permitted.
Line voltage circuits controlled by low voltage circuits shall be wired through properly rated relays in listed enclosures that
control all non-grounded current-carrying conductors.
Receptacles and Inlet Devices
Wet and Dry Locations
All wet location receptacle outlets and inlet devices, including those on hardwired, remote power distribution boxes, shall
be of the grounding type, provided with a wet location cover, and installed in accordance with Section 406.8, “Receptacles
in Damp or Wet Locations,” of NFPA 70.
All receptacles located in a wet location shall be not less than 24 in. (600 mm) from the ground. Receptacles on off road
fire apparatus shall be a minimum of 30 in. (750 mm) from the ground. All receptacles located in a dry location shall be of
the grounding type and shall be at least 12 in. (300 mm) above the interior floor height. No receptacle shall be installed in
a face-up position.
The face of any wet location receptacle shall be installed in a plane from vertical to not more than 45 degrees off vertical.
Receptacle Label
Each receptacle shall be marked with a label indicating the nominal line voltage (120 volts or 240 volts) and the
current rating in amps of the circuit. If the receptacle is DC or other than single phase, that information shall also be
marked on the label.
All receptacles and electrical inlet devices shall be listed to UL 498, Standard for Safety Attachment Plugs and
Receptacles, or other recognized performance standards.
Receptacles used for DC voltages shall be rated for DC service.
(112 paginas)
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