Here is Electric Wire Rope Hoist Manufacturer talking about Problems with cranes when grounding.
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Crane manufacturers have made progress on the problems of cranes during grounding installation,
I hope to help you!
First, the problem of grounding (zeroing) protection:
1. no grounding device;
2. There is no metal jumper at the rail joint;
3. There is only one grounding point for the full span;
4. The grounding wire section is smaller than the standard;
5. Adopt protection to connect to zero.