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Electrical High Risk

Portable Electrical Tools & Leads

Last updated: 20 January 2026

The Hazard

Damaged tools, worn leads, and overloaded circuits are a leading cause of electric shock and fire on construction sites. A damaged extension lead left in a puddle can be fatal.

Talking Points

  1. 1 Before every use: inspect lead for cuts, kinks, exposed cores, and damaged plugs — tag out any damaged leads immediately
  2. 2 Never use a lead that has been run over, cut, or has tape over the insulation
  3. 3 Do not pull leads through doorways, under mats, or across sharp edges
  4. 4 Use the right lead for the job — heavy-duty leads for high-amp tools (cutters, grinders)
  5. 5 RCDs must be tested daily on construction sites — press the test button, confirm it trips, reset
  6. 6 Keep leads off wet ground — use insulated stands or cable stands
  7. 7 Do not daisy-chain boards — one tool per socket, or use a distribution board
  8. 8 Generators: ensure frame is earthed, and check earth continuity before use

Control Measures

  • RCD-protected circuits on all construction boards (mandatory under WHS)
  • Regular inspection program for all leads — tagged with test date
  • Damaged equipment removed from service immediately
  • Site rules: no tape-spliced leads — replace completely
  • Lead management plan to keep leads off ground and away from traffic

WorkSafe Reference

AS/NZS 3012:2019 (Electrical installations — Construction and demolition sites); WHS Regulation 2011

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