People standing on the ground may be particularly vulnerable to possible injury. Cord Powered Equipment and Tools, Cords, and Temporary Wiring Protect flexible cords and cables from physical damage. Keep slack in flexible cords to prevent tension on electrical terminals. Check cords for cut, broken or cracked insulation. Make sure the insulating qualities of a splice are equal to or greater than the original cord.
Extension cords are for temporary use.
Install permanent wiring when use is not temporary. Equipment and Tool Grounding Verify that all three wire tools and equipment are grounded. Use GFCI protection in wet or damp environments. Ground exposed parts of fixed equipment that could become energized. Other Considerations Verify location of all buried or embedded electrical circuits before digging or cutting.