Windsor-Severence Fire Protection District
Heavy Rescue
Production Specification
SVI #774 Page 108 of 126 April 19, 2010
LOW VOLTAGE ELECTRICAL SYSTEM- 12 VDC
General
Any low voltage electrical systems or warning devices installed on the fire apparatus shall be appropriate for the mounting
location and intended electrical load.
Where wire passes through sheet metal, grommets shall be used to protect wire and wire looms. Electrical connections
shall be with double crimp water-tight heat shrink connectors.
All 12 VDC wiring running from front to back of vehicle body shall be run in full length electrical wiring raceway down each
side of body.
Wiring
All electrical circuit feeder wiring supplied and installed by the fire apparatus manufacturer shall meet the requirements of
NFPA Chapter 13.
The circuit feeder wire shall be stranded copper or copper alloy conductors of a gauge rated to carry 125 % of the
maximum current for which the circuit is protected. Voltage drops in all wiring from the power source to the using device
shall not exceed 10 %. The use of star washers for circuit ground connections shall not be permitted.
All circuits shall otherwise be wired in conformance with SAE J1292, Automobile, Truck, Truck-Tractor, Trailer, and Motor
Coach Wiring.
Wiring and Wire Harness Construction
All insulated wire and cable shall conform to SAE J1127, Low Voltage Battery Cable, or SAE J1128, Low Voltage Primary
Cable, type SXL, GXL, or TXL.
All conductors shall be constructed in accordance with SAE J1127 or SAE J1128, except where good engineering
practice dictates special strand construction. Conductor materials and stranding, other than copper, shall be permitted if
all applicable requirements for physical, electrical, and environmental conditions are met as dictated by the end
application. Physical and dimensional values of conductor insulation shall be in conformance with the requirements of
SAE J1127 or SAE J1128, except where good engineering practice dictates special conductor insulation. The overall
covering of conductors shall be moisture-resistant loom or braid that has a minimum continuous rating of 194°F (90°C)
except where good engineering practice dictates special consideration for loom installations exposed to higher
temperatures. The overall covering of jacketed cables shall be moisture resistant and have a minimum continuous
temperature rating of 194°F (90°C), except where good engineering practice dictates special consideration for cable
installations exposed to higher temperatures.
All wiring connections and terminations shall use a method that provides a positive mechanical and electrical connection.
The wiring connections and terminations shall be installed in accordance with the device manufacturer’s instructions. All
ungrounded electrical terminals shall have protective covers or be in enclosures. Wire nut, insulation displacement, and
insulation piercing connections shall not be used.
Wiring shall be restrained to prevent damage caused by chafing or ice buildup and protected against heat, liquid
contaminants, or other environmental factors.
Wiring shall be uniquely identified at least every 2 ft (0.6 m) by color coding or permanent marking with a circuit function
code. The identification shall reference a wiring diagram.
(112 paginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales