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Safe isolation of electrical circuits for maintenance and repair
Complete each step in order. Mark as Done (P), Not Done (F), or N/A. All steps must show P before work proceeds.
| # | Procedure Step | P | F | N/A | Notes |
|---|---|---|---|---|---|
| Circuit Identification | |||||
| 1 | Circuit identified from single-line diagram and switchboard schedule | □ | □ | □ | |
| 2 | All sources of supply identified (including back-feeds, UPS, generators) | □ | □ | □ | |
| 3 | Downstream loads identified and affected personnel notified | □ | □ | □ | |
| 4 | Capacitor discharge time confirmed (if applicable) | □ | □ | □ | |
| Isolation | |||||
| 5 | Load disconnected (equipment switched off at point of use) | □ | □ | □ | |
| 6 | Circuit breaker/isolator switched to OFF position | □ | □ | □ | |
| 7 | Personal padlock applied to isolating device | □ | □ | □ | |
| 8 | Danger tag attached with name, date, and reason | □ | □ | □ | |
| 9 | Additional isolation points secured (all sources) | □ | □ | □ | |
| Proving Dead | |||||
| 10 | Voltage tester proved on known live source before testing | □ | □ | □ | |
| 11 | Tested phase-to-phase, phase-to-neutral, phase-to-earth | □ | □ | □ | |
| 12 | Voltage tester proved on known live source after testing | □ | □ | □ | |
| 13 | Circuit confirmed dead at point of work | □ | □ | □ | |
| 14 | Earthing applied where required (HV or long cable runs) | □ | □ | □ | |
| Work Completion | |||||
| 15 | All work completed and connections secure | □ | □ | □ | |
| 16 | Tools and test equipment removed from work area | □ | □ | □ | |
| 17 | Covers and enclosures refitted | □ | □ | □ | |
| 18 | Insulation resistance tested (where applicable) | □ | □ | □ | |
| Re-energisation | |||||
| 19 | All personnel clear of equipment and warned | □ | □ | □ | |
| 20 | Temporary earths removed | □ | □ | □ | |
| 21 | Danger tag and personal lock removed by owner only | □ | □ | □ | |
| 22 | Circuit re-energised and operation verified | □ | □ | □ | |
| 23 | Affected personnel advised circuit is live | □ | □ | □ | |
Declaration
I confirm that safe isolation has been achieved following the prove-test-prove methodology. The circuit was confirmed dead before any electrical work commenced. Only a licensed electrician shall perform or supervise electrical lockout/tagout.