Understanding the requirements for switchboards and panelboards in Article 408
Understanding the requirements for switchboards and panelboards in Article 408
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Dear Sir,
We recently had a case where an unidentified electrical cabinet's cover was broken off while performing another task. It turned out that there was live exposed 220v wiring as well as live 24v circuits in the same cabinet. The apprentice electrician was working on the 24v circuit.
I see this as a hazard, firstly because the power supply wasn't isolated while the worker was working on it, secondly because "high voltage" (220v) and 24v circuits were incorporated in the same cabinet, thirdly because the cabinet was not identified as containing high voltage (or the yellow triangle with the inverted lightning symbol), and fourthly because this cabinet was situated aproximately 1.5 metres from the tar seal on the haul road.
Please comment on this and share your thoughts.
Is there guidance on whether spare circuit breakers in a panelboard should be left in the On or Off position?
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