Service Mast Height Above Roof

2 inch for 2 conductors 100 amp loop.

Service mast height above roof. Rigid galvanized steel conduit and roof plate conduit sizes. As the guidelines include 8 10 ft above any flat roof and no less than 24 above a gable roof at the mast head your cables are too close to the gutters. 2 inch for 4 0 conductors 200 amp loop. For underground service the poured footing must be notched out for the conduit.

One of the exceptions is the most common type of residential overhead electric service type so we will start with it. Meter base mounted on exterior wall of house or mobile manufactured home for overhead service weather head must be a minimum of three feet above the roof. The service mast should not be more than 3 feet vertically above the roof line. Over a roof with 4 12 slope or more within 4 feet of roof edge at eaves c 18 inches above decks and balconies including out 3 feet g h 10 feet to the sides and below an openable window i 3 feet.

Most utilities will require bracing or guy wires for additional support of any mast that is taller than 3 feet. The addition makes the mast less than 1 foot near the new gutter of the roof. Point of attachment on service conduit risers to be no more than 20 above the roof or parapet wall support for 1 1 2 rigid steel conduit no more than 30 above the roof or parapet wall support for 2 rigid steel conduit and no more than 50 above the roof or. Thru roof mast type overhead service combination entrance type 120 240 volt single phase 100 amp 200 amp 300 amp consumer to provide and have installed 1.

3 inch for 350 conductors 300 amp loop. Flat roofs need to have at least 8 feet of clearance and balconies need at least 10 feet of clearance.