Be on the safe side: use extension cords properly at all times and know these guidelines.
- Use extension cords only on a temporary basis.
- Always use an extension cord that can be grounded and has a duty rating appropriate for the job.
- Use extension cords that have a seal of approval from a major testing laboratory, such as Underwriters Laboratories (UL).
- Never use a tool with a three-prong grounding plug on an extension cord that only accommodates two prongs.
- Use only extension cords approved for outdoor use when outdoors.
- Use one long cord instead of several shorter lengths. The longer the extension cord is, the larger the wire diameter needs to be - typically, thicker is safer.
- Protect your cords from heat, chemicals, oil, etc.
- Store extension cords in a dry place, coiled loosely.
- Never nail or staple an electrical cord in place or run cords under rugs.
- Inspect cords regularly for damage. Replace damaged, cracked or frayed cords immediately. Never patch a cord with tape.