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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.

 

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