Harrington Hoists and Cranes (N)ER Large Cap Hoist - ((N)ER2 - Manual (Page 13)

Power Supply Cable - Installation
If the hoist is hook mounted to a fixed support ensure that the Power Supply Cable is properly
installed and supported between the hoist and the electrical power supply.
If the hoist is installed on a manual trolley, then the Power Supply Cable must be installed along
the beam that the trolley runs on. For curved beams a special cable suspension system will be
needed, and this instruction does not apply. For straight beams install the Power Supply Cable as
follows:
 Refer to Figure 3-7.
 Install the Cable Hangers on to the Power Supply Cable spacing them every 5 feet.
 Install a Guide Wire system parallel to the Bridge Beam. Pass the Guide Wire through the
Cable Hangers and the Wire Guide.
 Make sure the Guide Wire is properly tensioned and the Power Supply Cable is not twisted or
kinked.
3.5.8 Connection to Electrical Power Source - The red, blue, and black wires of the Power Supply Cable
should be connected to an Electric Power Disconnect Switch or Circuit Breaker. This connection
should be made so that the hoist is phased properly. Refer to Section 3.6.11 for instructions on how to
check for correct power supply phase connection.
3.5.9 Fuse/Breaker Capacity -The hoist's power supply should be equipped with overcurrent protection such
as fuses, which should be selected for 110% to 120% of total listed full load amperage, and should be
dual element time-delay fuses. Refer to the motor nameplate(s) for the full load amperage draw.
3.5.10

Grounding - An improper or insufficient ground connection creates an electrical
shock hazard when touching any part of the hoist or trolley. In the Power Supply Cable the ground wire
will be either Green with Yellow stripe or solid Green. It should always be connected to a suitable
ground connection. Do not paint the trolley wheel running surfaces of the beam as this can affect
grounding.
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