# Extension cords and GFCIs

URL: https://hardhatbinder.com/en/toolbox-talks/extension-cords-gfci
Last updated: 2026-10-23

Almost every tool we run this week plugs into a cord. A damaged cord or a missing GFCI can kill you in a second, especially around water, mud, or metal. Let's make sure every cord and outlet we use today is safe before we plug in.

## Key points

1. Use a GFCI on every temporary power outlet and cord you use on site. If the outlet isn't protected, plug in a portable GFCI first.
2. Test the GFCI before you start: push TEST, make sure it trips, then push RESET. If it doesn't trip, don't use it and tell me.
3. Inspect every cord before use. Look for cuts, crushed spots, exposed wires, tape repairs, and missing ground pins. If you find damage, take it out of service and tag it.
4. Use only heavy-duty, three-prong cords rated for outdoor or hard use. No flat household cords on the job.
5. Keep cords out of water and away from traffic, sharp edges, and doorways. Hang them up or cover them so trucks and equipment don't run them over.
6. Never carry a tool by its cord or yank the cord to unplug it. Pull on the plug.
7. Don't hang cords on nails or tie them in knots, and don't daisy-chain cords together to reach farther.

## Talk it over

- Where on our site are cords getting run over, sitting in water, or pinched by doors?
- When was the last time you tested the GFCI you're plugged into?
- What should you do if a GFCI keeps tripping while you're working?

> **Remember:** Check the cord, test the GFCI, then plug in — every time.

## Official sources

- [29 CFR 1926.404](https://www.ecfr.gov/current/title-29/section-1926.404) — Wiring design and protection
- [29 CFR 1926.405](https://www.ecfr.gov/current/title-29/section-1926.405) — Wiring methods, components, and equipment

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Source: HardHat Binder, operated by Leadspire LLC. Templates to be reviewed by a competent person before use; not legal advice; not affiliated with OSHA.