Specifications

December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-27
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l. All wiring shall be identified with hot stamped, machine printed wiring numbers
printed on the insulation itself with no more than 6 inches of space between the
identifying printed numbers along the continuous run of wire. Numbers shall not
be removable by and be impervious to normal abrasion, oils, diesel, grease, Anti-
Freeze, and water.
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m. Wire markers and/or any type of heat shrink shall not cover any termination point
or crimped lug without SRTA approval.
14.9 Towing Connector
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a. An electrical receptacle shall be provided behind the front bumper of each coach,
adjacent to the air connector described elsewhere in this section, to receive
power for illuminating the tail lights, stop light, and directional signals from a
towing vehicle.
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b. The receptacle shall be a 7-wire receptacle assembly "Cole-Hersee" No. 12063,
or approved equal . The pins shall be coated with corrosion resistant paste.
The termination end of the receptacle shall be strain relieved and sealed
against water entry. Location, installation and pin wiring arrangement to be
approved by the SRTA at the Pre- Production Meeting.
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14.10 Farebox Wiring and Mounting
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a. Provisions shall be made for a 12-volt circuit for farebox operation and alarm.
The supply shall be located in a weather proof junction box immediately under
the farebox mounting area. A GFI farebox, or approved equal, wiring harness
shall be supplied and installed from the under floor junction box the farebox
mounting plate inside the bus. This harness shall be equipped with a GFI
quick disconnect male plug to allow connection of the harness to the farebox.
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b. The manufacturer shall provide three (3) 16 gauge wires, (white, brown, yellow),
loom covered, routed from a terminal strip in the radio box to the farebox junction
box and to the farebox mounting plate inside the bus. A 2 inch (2”) conduit will be
installed between the farebox junction box under the floor and the radio box to
allow data cables to be pulled to interface the farebox and radio system.
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c. A GFI mounting kit consisting of a mounting bolt and under floor ground strap
shall be provided and installed on each bus. The ground strap shall be
connected to the bus frame.
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14.11 Radio Power Supply and Communications Cabling
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a. A separate electrical circuit, initiated at the batteries and terminating at the radio
box shall be supplied. This circuit shall be independent of the electrical main
switch, be capable of delivering 40 continuous amperes at 12 volts and be
protected at the source with an adequate circuit breaker. No other electrical
equipment shall be attached to this circuit. It shall be connected and placed to
minimize electrical noise, hash and transients. If a 24 volt coach electrical system
is used for the coach, an "Electric Transit Laboratories Inc. (ETL)” converter, or
approved equal, shall be provided in the radio box to supply 12 volt power to the
radio.
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b. Contractor is to install appropriate loom conduit and necessary radio accessories
for later installation of radio and control head.