Transformer Damaged Beyond Repair During Excavation

Incident Investigation

Transformer Damaged Beyond Repair During Excavation

October 20, 2022

Electrical

Reference Number:

II-1454740-2022 (#30195)



Location: Golden

Electrical - Low voltage electrical system (30V to 750V)

Incident Overview

An excavator was digging a trench close to a building when the bucket hooked onto a grounding conductor causing irreparable damage to the transformer. The shallow unmarked depth of the system grounding conductor was the primary cause of the incident.

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