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Putting the supply back on safelyWhat happens the moment the supply comes back?
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The question at the end: What happens the moment the supply comes back? The answer is in the notes below.
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Re-energising deserves the same care as isolating, and it is the half nobody practises. Everything that was running when you killed the supply will start again the moment you restore it — and you will not be expecting it.
Picture what that means. A heater someone had left on. A shower. Something that gets hot in seconds, with a hand resting on it.
| # | Before the main switch goes back on |
|---|---|
| 1 | Every circuit breaker and RCD off |
| 2 | Unplug what is plugged in. Switch off equipment at its own switch — cooker, shower, motors, machinery |
| 3 | Light switches off |
| 4 | Now unlock, take the lock-off device out, and put the board cover back on |
| 5 | Main switch on |
| 6 | Reinstate one circuit at a time, then go round and bring equipment back on point by point |
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- 18th Edition
- Building Regs
- PAT
- Fundamental Inspection & Testing
- Initial Verification
- Periodic Inspection & Testing