Drilling in residential parkade causes loss of power to critical fire pump circuit

Incident Investigation

Drilling in residential parkade causes loss of power to critical fire pump circuit

May 8, 2020

Electrical

Reference Number:

II-1013256-2020 (#17432)



Location: Langley

Regulated industry sector: Electrical - Low voltage electrical system

Incident overview

A construction worker drilled into an energized 600 volt fire pump cable beneath the concrete surface. An electrical fault between the energized conductors and the metal drill bit occurred and the fire pump circuit breaker opened causing a loss of power to a critical fire pump circuit.

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