Extension cords and power cords are used every day on job sites, but damaged or improperly used cords can cause electrical shock, burns, fires, and equipment damage. Taking a few moments to inspect cords before use can prevent serious injuries.
What Should You Inspect Before Using a Cord?
Before plugging in any electrical tool or extension cord, check for these problems.
- Cuts, cracks, or exposed wires
- Missing or damaged grounding prongs
- Loose plugs or connectors
- Burn marks or melted insulation
- Damaged strain relief at the plug or tool
If a cord is damaged, remove it from service immediately, and never repair a cord with electrical tape.
What Are Safe Extension Cord Practices?
Match the cord to the job and protect it from damage.
- Use cords rated for the job and the environment
- Select the correct gauge for the electrical load
- Fully unwind extension cords before use to prevent overheating
- Keep cords away from water, oil, sharp edges, and moving equipment
- Protect cords from vehicle traffic and pinch points
- Never pull a cord by the wire, and grasp the plug instead
- Do not overload extension cords or power strips
When Should You Use Ground Fault Protection?
Use Ground Fault Circuit Interrupters, or GFCIs, and test them before use.
- Outdoors
- In wet or damp locations
- On construction sites
- Whenever required by company policy or OSHA regulations
What Common Cord Mistakes Should You Avoid?
These shortcuts cause a large share of cord-related incidents.
- Daisy-chaining extension cords together
- Running cords through doorways where they can be pinched
- Using indoor cords outdoors
- Removing the grounding prong
- Suspending cords by the wire instead of using proper supports
- Using extension cords as permanent wiring
Electricity cannot be seen, smelled, or heard, and a five-minute inspection can prevent serious injuries and save lives. If in doubt, tag it out and replace it.
