Harrington Hoists and Cranes (N)ERCC Hoist - ((N)ER1) - Manual (Page 8)

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3.5.4 Power Supply Cable Hoist Connection – The Power Supply Cable connects to the hoist via a 4-pin
(4P) plug and socket. Make this connection as follows:
§ Refer to Figure 3-3.
§ Insert the 4P plug of the Power Supply Cable into the 4P Socket on the hoist and hand tighten the
screw coupling.
§ Install the Cable Support Arm (pre-installed on the Power Supply Cable) on to the Socket Holder
using the pre-installed Machine Screws and Lock Washers.
Use care to avoid twisting or kinking the Power Supply Cable.
3.5.5 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 host 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:
§ Install a guide wire system parallel to the beam.
§ For a manual trolley the guide wire should be positioned slightly outside the hoist's Cable
Support as shown in Figure 3-3.
§ Use the Cable Trolleys supplied with the hoist to suspend the Power Supply Cable from the
guide wire. Space the Cable Trolleys every 5 feet.
Figure 3-3 Coiled Control Cable and Power Supply Cable Connections
3.5.6 Connection to Electrical Power Source - The red, white, 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 of the EROM for
instructions on how to check for correct power supply phase connection.
3.5.7 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 for the full load amperage draw.
3.5.8
DANGER
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.