Fault Phenomenon: Verlinde explosion-proof hoist during safety inspection, the housing ground resistance is found to be greater than 4 ohms.

Troubleshooting Process:
– Checked ground wire: ground wire corroded and broken.
– Checked connection point: paint not scraped off at connection point, poor contact.
– Re-made ground wire, scraped paint from contact surface and tightened.

Root Cause: The ground wire was corroded and broken, and the connection point had poor contact.

Required Parts: Copper braided ground wire.