Service Wire Running Parallel Over Roof Overhang

Of service drop conductors pass above the roof overhang for the purpose of terminating at a through the roof service raceway or approved support may be maintained at a minimum of 18 inches from any portion of the roof over which they pass.

Service wire running parallel over roof overhang.

An electric service drop is the bundle of electrical cables that run from the electric utility company s power pole to the connection at your house. Where the voltage does not exceed 300v between conductors overhead conductor clearances from the roof can be reduced from 8 ft to 3 ft if the slope of the roof exceeds 4 in. Service drop conductors of 300 volts or less between conductors where not more than 4 ft. For 120 208v or 120 240v service drop conductors conductor clearance over the roof overhang can be reduced to 18 inches if no more than 6 feet of overhead conductors pass over no more than 4 feet of roof fig.

If the service mast is used in a through the roof application 120 208v or 120 240v conductor clearances can be reduced to 18 inches over the overhang portion of the roof 230 24 a ex 3. Because the power company lines are higher than your home the cables that go to your home literally drop descending from a higher spot to a lower spot. And by the way if anyone is paying attention the service mast shown at the top of the page is a 4 wire for three phase service which is. For 120 208v or 120 240v service drop conductors overhead conductor clearances from the roof can be reduced 3 feet if the slope of the roof exceeds 4 inches for every 12 inches.

The overhanging portion of the roof to not less than 450 mm 18 in shall be permitted if 1 not more than 1 8 m 6 ft of service drop conductors 1 2 m 4 ft horizontally pass above the roof overhang and 2 they are terminated at a through the roof raceway or approved support. On a single story home or the the upper floor of a multiple story home this means accessing your attic to run wire. Section 300 3 b 1 deals with parallel conductor installations and the reference within this section to 310 4 provides permission for parallel conductors to be installed separate from each other. New lighting cable computer networking and sound systems can all require wiring that may need to come through the ceiling.

And for a more detailed exploration of the requirements as the service wires cross above a roof see our blog post what is the minimum clearance of overhead electric service drop wires above a house roof.