Specifications

Electrical system requirements – continued:
• All electrical wiring shall be placed in a protective loom or it shall be harnessed
• Exposed connections shall be protected by heat shrink material and sealed connectors
• Large fender washers shall be used when fastening equipment to the underside of the cab roof and all
holes made in the roof shall be caulked with silicone
• Electrical components installed in exposed areas shall be mounted in a manner that will not allow
moisture to accumulate inside
• A coil of wire must be provided behind an appliance to allow them to be pulled away from mounting
area for inspection and service work
• All lights in a weather exposed area that have sockets shall have corrosion preventative compound
added to the socket terminal area
• Warning lights shall be switched in the chassis cab with labeled rocker type switches located in an
accessible location. Individual rocker switches shall be provided only for lights exceeding the minimum
level of warning lights in either the stationary or moving modes. All electrical equipments switches
shall be appropriately identified as to their function and mounted on a switch panel in the cab. An
indicator light shall be provided to indicate when a circuit is energized.
• A single warning light switch shall activate all required warning lights. The switch shall activate all
required warning lights. The switch shall allow the vehicle to respond to an emergency “calling for the
right of way”. When the parking brake is activated a “blocking the right of way” system shall be
automatically activated per NFPA #1901 requirements.
Electrical testing and certifications:
Upon completion of the vehicle and prior to delivery the apparatus shall be electrically tested. The electrical
testing, certifications and test results shall be submitted with delivery documentation per NFPA #1901
requirements. The following minimum testing shall be completed by the apparatus manufacturer:
• Reserve capacity test: the engine shall be started and kept running until the engine and engine
compartment temperatures stabilize at normal operating temperatures and the battery system is fully
charged. The engine shall be turned off and the minimum continuous electrical load shall be activated
for ten (10) minutes. All electrical loads shall be turned off prior to restarting the engine. The battery
system shall be capable of restarting the engine. Failure to restart the engine shall be considered a test
fail.
• Alternator performance test at idle: the minimum continuous electrical load shall be activated with the
engine running at idle speed. The engine temperature shall be stabilized at normal operating
temperature. The battery system shall be tested for the presence of battery discharge current. The
detection of battery discharge current shall be considered a test failure.
• Alternator performance test at full load: the total continuous electrical load shall be activated with the
engine running up to the manufacturer’s governed speed. The test duration shall be a minimum of two
(2) hours. Activation of the load management system shall be permitted during the test. An alarm
sounded by excessive battery discharge as detected by the system required in NFPA #1901 standard or a
system voltage of less than 11.7 volts dc for a 12 volt system for more than two (2) minutes shall be
considered a test failure.