General Precautions
Follow these general electrical safety precautions on construction sites:
- Secure electric equipment firmly to the surface on which it is mounted. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials must not be used.
- Do not work on new and existing energized (hot) electrical circuits until all power is shut off and grounds are attached.
- Make sure an effective Lockout/Tagout system is in place.
- Promptly replace frayed, damaged or worn electrical cords or cables.
- Ensure all extension cords have grounding prongs.
- Protect flexible cords and cables from damage. Sharp corners and projections should be avoided.
- Use extension cord sets used with portable electric tools and appliances that are the three-wire type and designed for hard or extra-hard service. (Look for some of the following letters imprinted on the casing: S, ST, SO, STO.)
- Maintain all electrical tools and equipment in safe condition and regularly check for defects and take the tools out of service if defects are found.
Maintain all electrical tools and equipment in safe condition and regularly check for defects.
- Do not bypass any protective system or device designed to protect employees from contact with electrical energy.
- Locate and identify overhead electrical power lines.
- Ensure that ladders, scaffolds, equipment or materials never come within 10 feet of electrical power lines.
- Properly ground all electrical tools unless they are of the double insulated type.
- Do not allow multiple plug adapters.
Knowledge Check Choose the best answer for the question.
4-8. What action should you take if you see a frayed, damaged, or worn electrical cord or cable?
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