EXTERIOR/INTERIOR CONTACT HAZARD

L.  EXTERIOR/INTERIOR CONTACT HAZARD:
Wires strung through the air around homes are supposed to be insulated and at least 12 feet off the ground (Fig. L1, Item A).  Power wires entering houses should also be well insulated and kept clear of antennas and the like (Fig. L1, Item B).  Wires strung through trees are a real danger, especially when tree pruning.

Fig. L1

Driveways next to houses with a meter projecting into the drive area can sometimes be hazardous (Fig. L1, Item C).  Open junction boxes with bared wires or uninsulated cables that are readily accessible can be interior contact hazards.

Generally, outside cables should be no less than 18 feet above traffic, 12 feet above a yard or driveway, 10 feet where attached to structures, (clearance is needed above porches and decks) 4 feet away from roofs, and 3 feet away from windows and doors.  The Canadian standards are 3 meters above porches, decks, and flat or metal roofs and 1 meter above wooden roofs.  Differences in rules may exist in different locations.  Always contact the local authorities to determine the rules in your area.

WHAT TO:  HOW TO:
Notify the electric utility company of poorly insulated wiring.  Avoid placing roof top antennas near electric service entrance lines.  Make sure wiring connecting buildings or external fixtures is the right type, and done according to code.  Buried wiring is supposed to be at least 12 inches and sometimes 18 inches deep so that it won’t be accidentally struck with shallow digging.  Replace or raise low slung lines.  Shield any interior contact hazards or replace defective wiring.

REFERENCE: E6, E9