Free electrical isolation checklist
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Free electrical isolation checklist (PDF-ready). Covers isolation procedure, lock/tag, voltage testing, permit-to-work and de-isolation. Download free.
Commercial Director
Updated 3 May 2026
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What is a electrical isolation checklist?
An electrical isolation checklist is a structured form used to verify that electrical equipment or circuits have been safely isolated, de-energised, locked out and tagged before maintenance, testing or repair work begins. It records each isolation point, the method of isolation (switching, fuse removal, link removal), lock and tag details, voltage testing results (proving dead) and the authorised personnel involved. Under AS/NZS 4836 (Safe working on or near low-voltage electrical installations), electrical isolation is required before any work on or near electrical equipment where there is a risk of contact with live parts. The checklist also documents the de-isolation procedure to ensure circuits are safely re-energised when the work is complete.
Electrical incidents are among the most dangerous workplace events, with arc flash and electrocution capable of causing fatal injuries in a fraction of a second. A completed isolation checklist provides verifiable evidence that the correct isolation procedure was followed, that voltage testing confirmed absence of supply at the point of work, and that personal locks and tags were applied before anyone began the task. The WHS Regulations 2011 and AS/NZS 4836 (Safe working on or near low-voltage electrical installations) mandate documented isolation procedures before any electrical work commences. A single missed step in the isolation sequence can expose workers to arc flash or electrocution, making a structured checklist essential for every isolation event.
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Benefits of using this electrical isolation checklist
- Electrical safety: systematic verification that circuits are de-energised before work prevents electrocution and arc flash incidents.
- AS/NZS 4836 compliance: meets Australian requirements for safe working on or near electrical installations.
- Prove-dead verification: mandatory voltage testing step confirms absence of voltage at the point of work.
- Lock and tag accountability: records who applied each lock and tag, creating personal accountability for each isolation point.
- Communication: ensures all affected personnel are notified before isolation and de-isolation.
- Audit trail: completed checklists provide documented evidence for electrical safety audits and incident investigations.
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What to include in a electrical isolation checklist
This electrical isolation checklist covers 9 key areas:
- Equipment/circuit details: description, asset ID, location, voltage rating.
- Isolation points: list each isolation point (switchboard, circuit breaker, isolator, fuse).
- Isolation method: switching, fuse removal, link removal, earth applied.
- Lock and tag details: lock number, tag number, person who applied, date/time.
- Voltage test: tester ID, calibration date, test on known live source (before), test at point of work (absence of voltage confirmed), test on known live source (after).
- Permit details: permit number, issuing authority.
- Personnel: isolating person, responsible person, all workers under the isolation.
- De-isolation: all locks removed, all tags removed, all personnel clear, circuit re-energised, tested operational.
- Signatures: isolating person, responsible person.
How to use this electrical isolation checklist
- Identify the circuit or equipment and all isolation points - check drawings and verify.: Obtain the single-line diagram or switchboard schedule and identify every point where the circuit can be energised. Walk the site and physically verify each isolation point matches the drawings. If the drawings are not available or not current, trace the circuit with a competent electrician.
- Notify all affected personnel of the planned isolation.: Inform all workers, contractors and building occupants who may be affected by the loss of power. Advise the expected duration and any areas that will be impacted. Use a written notification or toolbox briefing and obtain acknowledgement.
- Isolate at each point - switch off, remove fuses, open isolators as required.: Follow the normal shutdown sequence for the equipment before isolating at the switchboard or distribution board. Open each circuit breaker, remove fuses or open isolator switches as required. Apply earths to high-voltage circuits where specified by your isolation procedure.
- Apply personal lock and danger tag to each isolation point - record on the checklist.: Each person working under the isolation must apply their own personal lock and danger tag. Record the lock number, tag number, the name of the person who applied it and the date and time on the checklist. No other person may remove your lock.
- Prove dead using a calibrated voltage tester - test the tester before and after.: Test the voltage tester on a known live source to confirm it is working correctly. Then test for absence of voltage at the point of work on all phases and the neutral. Test the tester again on the known live source after proving dead. Record the tester ID and calibration date on the checklist.
- Complete the work, then de-isolate in reverse order after confirming all personnel are clear.: Before de-isolating, confirm all workers have finished, all tools and materials are removed, and all guards and covers are replaced. Each person removes their own lock. Notify affected personnel that power is being restored. Energise in the reverse sequence and test equipment operation.
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Electrical isolation must be performed before any work on or near electrical equipment where there is a risk of contact with live parts. This includes maintenance, repair, testing, cleaning, painting, and any work within the exclusion zone of live electrical equipment. Isolation is also required before mechanical work on equipment that could be unexpectedly energised. A new isolation checklist should be completed for each isolation event; never rely on a previous isolation without re-verifying. If additional workers need to join the work, each person must apply their own lock and tag. The isolation must be re-verified if it has been left unattended or if there is any doubt about its integrity. Under AS/NZS 4836, only authorised and competent persons may perform electrical isolation.
AS/NZS 4836 and Safe Work Australia's Code of Practice for Managing Electrical Risks require that the isolation procedure be documented and that voltage testing (proving dead) is performed before every work event, not just the first isolation of the day. WHS Regulations 2011 (Chapter 4, Part 4.7) place a duty on the PCBU to ensure that electrical risks are eliminated or minimised so far as is reasonably practicable. Organisations with frequent isolation activities should maintain a permit register and review isolation procedures at least annually or after any electrical incident or near miss.
Frequently asked questions
Applicable regulatory standards
This template aligns with the following regulations and standards:
- AS/NZS 4836 - Safe working on or near low-voltage electrical installations
- AS/NZS 3000 - Electrical installations (Wiring Rules)
- WHS Regulations 2011 - Chapter 4, Part 4.7 (electrical safety)
- Safe Work Australia - Code of Practice: Managing electrical risks in the workplace
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