Failure of the bonding connection caused damage to a single-family dwelling
Incident Investigation
Failure of the bonding connection caused damage to a single-family dwelling
July 17, 2020
Electrical
Reference Number:
II-1042078-2020 (#18835)
Location: Vancouver
Regulated industry sector: Electrical - Low voltage electrical system
Incident overview
Due to the poor bonding connection made by the loose locknut and oversized knockout for the connector, the bare conductor and metal connector arced until the bonding path failed. This failure occurred before and without the supply utilities overcurrent protection clearing the fault.