Windsor-Severence Fire Protection District
Heavy Rescue
Production Specification
SVI #774 Page 119 of 126 April 19, 2010
Location Ratings
Any equipment used in a dry location shall be listed for dry locations. Any equipment used in a wet location shall be listed
for wet locations.
Any equipment, except a PTO-driven generator, used in an underbody or under chassis location that is subject to road
spray shall be either listed as Type 4 or mounted in an enclosure that is listed as Type 4.
If a PTO-driven generator is located in an underbody or under chassis location, the installation shall include a shield to
prevent road spray from splashing directly on the generator.
Grounding
Grounding shall be in accordance with 250.34(A) and 250.34(B) of NFPA 70. Ungrounded systems shall not be used.
Only stranded or braided copper conductors shall be used for grounding and bonding.
The grounded current-carrying conductor (neutral) shall be insulated from the equipment-grounding conductors and from
the equipment enclosures and other grounded parts.
The neutral conductor shall be colored white or gray in accordance with 200.6, “Means of Identifying Grounded
Conductors,” of NFPA 70.
Any bonding screws, straps, or buses in the distribution panelboard or in other system components between the neutral
and equipment-grounding conductor shall be removed and discarded.
Bonding
The neutral conductor of the power source shall be bonded to the vehicle frame. The neutral bonding connection shall
occur only at the power source. In addition to the bonding required for the low voltage return current, each body and each
driving or crew compartment enclosure shall be bonded to the vehicle frame by a copper conductor.
The conductor shall have a minimum amperage rating, as defined in 310.15, “Ampacities for Conductors Rated 0–2000
Volts,” of NFPA 70, of 115 percent of the rated amperage on the power source specification label.
A single conductor that is sized to meet the low voltage and line voltage requirements shall be permitted to be used.
Ground Fault Circuit Interrupters
In special service vehicles incorporating a lavatory, sink, toilet, shower, or tub, 120 V, 15 or 20 A receptacles within 6 ft
(1.8 m) of these fixtures shall have ground fault circuit interrupter (GFCI) protection. GFCIs integrated into outlets or circuit
breakers or as stand-alone devices shall be permitted to be used in situations.
Power Source General Requirements
All power source system mechanical and electrical components shall be sized to support the continuous duty nameplate
rating of the power source.
The power source shall be shielded from contamination that would prevent the power source from operating within its
design specifications.
(112 paginas)
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