Service Mast Through Roof

Service entrance mast kit 2 in with service entrance cap roof flashing wire holder and straps.

Service mast through roof.

If the service mast is a through the roof installation meaning that it only penetrates the roof at the overhang to come down to a meter at the exterior wall below as in the photo above then the wires are only required to clear the roof by 18 inches. 2 inch for 2 conductors 100 amp loop. The service mast shall be of adequate strength or be supported by braces or guys to withstand safely the strain imposed by the service drop or overhead service. The service drop is either anchored to a metal pole rising through the roof or attached to the exterior of the house.

There are a couple of further stipulations for this exception to be allowed. Mfr mk200wh view product. 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. There must not be more than 6 feet of service drop conductors over the overhang portion of the roof and the service mast can t be located more than 4 feet from the edge of the roof overhang measured horizontally.

The pole is called the mast or riser and it contains a large cable or individual wires known as the service entrance conductors or service entrance cable. Sometimes you ll see a through the roof service mast that appears to be leaning from tension in the overhead service drop conductors. On 2018 04 12 by willie i have added on to a house with overhead service. 3 inch for 350 conductors 300 amp loop.

2 inch for 4 0 conductors 200 amp loop. Wedge stainless steel 1 to 6 aac awg 2 to 6 aaac awg 2 to 6 acsr awg. 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. These conductors exit the mast through the weatherhead which is shaped so that the conductors slant downward as they come out.

The typical service mast consists of 2 inch rigid metal conduit. Service masts used for the support of service drop or overhead service conductors shall be installed in accordance with 230 28 a and b. Rigid galvanized steel conduit and roof plate conduit sizes. Only power service drop or overhead service conductors shall be permitted to be attached to a service mast.

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. Supporting a mast above the roof.