2010 Construction and Material Specifications - Ohio Department of ...

733.03
n. Grounding System/Bus Bars. Furnish a cabinet that includes a
grounding system as specified in NEMA TS-1, Section 10.3.2.1 with an adequate
number (minimum of three) of ground terminal points.
o. Wiring. Neatly organize and route the harnesses and wiring
bundles to individual terminals. Ensure that the harness provides a wire for each
pin or contact of the device. Connect each wire to a marked terminal position.
Use labeled spade type terminals or plug connections on all harness wiring. Group
and lash or restrain wire bundles in such a manner that they will not interfere with
the access to components, terminal blocks or buses, or the legibility of terminal
identification. Ensure that the harnesses are of sufficient length to reach any point
within the cabinet. Ensure that the cables and harness bundles are easily traced
through the cabinet to their terminations.
Wire the cabinet so that controller pin connections associated with a
given phase number matches the phase number assigned to the specified traffic
movement as shown on the plans.
Furnish all wiring with stranded conductors. Ensure that the wiring is
adequate for the voltage and load that represents the ultimate load of the devices
connected. Ensure that the ampacity rating of the wires are as specified in NEMA
TS-1, Section 10.3.3.1. Ensure that the wiring is color coded as follows:
(1) Solid white, AC common.
(2) Solid green or green with yellow stripes, equipment ground.
(3) Solid black, AC line side power (AC+).
p. Loop Detector Units. Furnish loop detector units that comply
with the requirements of NEMA TS-1, Section 15, with the following
modifications:
(1) Furnish loop detector units that are shelf mounted and
powered from 120 volts.
(2) Ensure that the unit uses solid-state isolated output devices.
(3) Furnish conductors in the cable harness for loop input pins
that are twisted three to five times per foot (300 mm).
(4) Furnish detector unit electrical connection plugs or wiring
harness that are designed such that any multi-channel shelf mounted detector unit
is readily replaced with single channel detector units. Furnish only units with the
connector type required for single channel shelf mounted detector units, or by
wiring the controller back panel to single channel wiring harnesses which are, in
turn, plug connected to an adapter harness that is mated to the multi-channel
connector of the detector unit.
(5) When shown on the plans, supply delay and extension
timing capability on the detector unit; otherwise, the controller unit software
requirements of 733.02 will provide these features.
(6) Ensure that the harness provides a wire for each pin or
contact of the device.
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