Service Conductors Through Roof

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.

Service conductors through roof.

The service drop is either anchored to a metal pole rising through the roof or attached to the exterior of the house. Additional services are permitted to supply fire. These conductors exit the mast through the weatherhead which is shaped. If a set of 120 240v overhead service conductors terminate at a through the roof raceway or approved support with less than 6 feet of these conductors passing over the roof overhang the minimum clearance above the roof for these service conductors shall be.

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. When the service drop reaches the house it connects to an assembly called the service head also know as the service mast or masthead. 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. 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.

The mast itself is on the side of the house but the service drop does not go to the mast from that side of the house. Figure 230 10 230. In general a building or structure can be served by only one service service drop or service lateral except as permitted by 203 2 a through d. Service drop conductors pass over the roof of an intervening building clearance of three feet is required.

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. Application guidelines for service conductors everything you wanted to know about service conductors and more. There are a couple of further stipulations for this exception to be allowed. It goes over an open roof on a newer addition for about 12.

If the slope of the roof exceeds 4 inches for every 12 inches 120 208v or 120 240v conductor clearances can be reduced to 3 feet over the roof 230 24 a ex 2. 230 covers the installation requirements for service conductors and equipment. The minimum clearance above only the overhanging portion of the roof shall not be less than 18 inches 457 mm where not more than 6 feet 1829 mm of overhead service conductor length passes over 4 feet 1219 mm or less of roof surface measured horizontally and such conductors are terminated at a through the roof raceway or approved support.