Mast Head Attached To Roof

The service head and service point when the service drop reaches the house it connects to an assembly called the service head also know as the service mast or masthead.

Mast head attached to roof.

2 inch for 2 conductors 100 amp loop. Over a roof low slope roof with less than 4 12 slope a 8 feet. These conductors exit the mast through the weatherhead which is shaped so that the conductors slant downward as they come out. First you make the mast attachment blocks.

It must be sized to match the mast pole you intend to use. Lastly you attach the mast to the blocks. Service masts used for the support of service drop or overhead service conductors shall be installed in accordance with 230 28 a and b. 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.

The service drop is either anchored to a metal pole rising through the roof or attached to the exterior of the house. Pressure treated 2x4 very important that the wood is pressure treated. Typically a service head consists of a rigid steel conduit like a big pipe that runs up through the roof or along an exterior wall and is topped with a shell like fitting called a weatherhead or weather cap. Over a roof with 4 12 slope or more b 3 feet.

Re roofing around an existing service head. Over a roof with 4 12 slope or more within 4 feet of roof edge at eaves c 18 inches. To the sides and below an openable window i 3 feet. Above decks and balconies including out 3 feet g h 10 feet.

This gizmo costs more than the cheap ones but works well and should never leak since such a great design. Some of them may be anchored or attached to the wall. Electrical weatherhead installation although it is common for weatherheads are generally mounted to a mast some of them may not follow the general installation. On 2018 04 12 by willie i have added on to a house with overhead service.

3 utilization of couplings for a mast are permitted only below the point the mast is braced secured or supported. 230 28 masts as supports. It is also possible to have a special clamp that will secure the entrance conductors that is directly connected to the weatherhead. 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.

12 x 2 5 self tapping screws preferable hex head 12 x 1 2 screws self tapping not necessary 2 hole rigid conduit strap. 2 masts must be braced secured and supported in such a manner that no pressure from the attached conductors will be exerted on a roof flashing meter base or other enclosures. Rigid galvanized steel conduit and roof plate conduit sizes. 2 inch for 4 0 conductors 200 amp loop.

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. Then you attach the blocks to the building.