Harrington Hoists and Cranes SMR Trolley - Manual (Page 21)

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Figure 3-14 Power Supply Cable Terminal Connections.
Figure 3-15 Trolley to Hoist Terminal Connections
3.4.8
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.