Metalfab Motorized Trolley MR Series - Manual (Page 21)

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Power Supply Cable Hoist Connection – The Power Supply Cable connects directly to the trolley's
Switch Box using Cable Holder Assembly. Make this connection as follows:
1) Refer to Figure 3-12 or 3-13 depending on the product code of the trolley/hoist.
2) With 1 inch of the outer cable insulation extending beyond the cable packing, insert the cable into
the switch box and screw together Cable Holder A and B.
3) Refer to Figure 3-14 and connect the black, red and white wires to terminals 1, 2, and 3 on the
terminal strip inside the Switch Box. Connect the ground wire (green with yellow stripe or solid
green) to the ground terminal next to the terminal strip.
4) Install the Cable Support Assembly (pre-installed on the Power Supply Cable) onto the Cable
Support Arm Assembly as shown in
Figure 3-15 .
5) Use care to avoid twisting or kinking the Power Supply Cable.
Trolley to Hoist Connections – The trolley connects to the hoist via short cables that are factory
installed into the trolley Switch Box. The Cables are fitted with plug assemblies that match sockets in
the hoist bodies. Make these connections as follows:
1) Refer to Figure 3-12 or 3-13 depending on the product code of the trolley/hoist.
2) Insert the 4P Plug(s) into the 4P Socket(s) on the hoist and hand tighten the Screw Coupling(s).
3) Insert the 5P Plug(s) into the 5P Socket(s) on the hoist and hand tighten the Screw Coupling(s).
Power Supply Cable Festooning – The MR trolley is standardly supplied with Cable Hangers for the
Power Supply Cable. Make this connection as follows:
1) Refer to Figure 3-15 .
2) Install the Cable Hangers onto the Power Supply Cable spacing them every 5 feet.
3) Install a Guide Wire system parallel to the beam. Pass the Guide Wire through the Cable Hangers
and Wire Guide.
4) Make sure the Guide Wire is properly tensioned and the Power Supply Cable is not twisted or
kinked.
3.4.5 Connection to Electrical Power Source - The black, red and white 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 ER, NER or other hoist is phased properly. Refer to
Section 3.5.5 for
instructions on how to check for correct power supply phase connection.
3.4.6 Fuse/Breaker Capacity -The power supply for the trolley and hoist 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 nameplates on the trolley and hoist
for the full load amperage draw of each and added the two values together for the total amperage.
3.4.7
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.