SERVICE-ENTRANCE CONDUCTORS

The service-entrance conductors shall consist of approved service-entrance cable, conductors in rigid or intermediate conduit (thin wall or flexible conduit is not acceptable), or other Company approved wiring methods. The Customer shall be responsible for maintaining the service-entrance conductors in a satisfactory condition at all times. Service-entrance conductors should be liberally sized to minimize voltage drop, especially for long service runs.

Service-Entrance Conductors, Underground

See section 5.1 for the division of responsibility and ownership for underground services. The Company recommends a minimum ampacity of 200 amperes for underground service-entrance conductors. Special metering may be required as described in Section 5.1.4 and Section 8.4.

Service-Entrance Conductors, Overhead

Service-entrance conductors to overhead lines shall be equipped with a rainproof service head or a fitting approved by the inspection agency having jurisdiction and shall extend at least 3 feet beyond the fitting for connection to the service line. This service head shall have a clearance of not less than 3 feet from windows, doors, porches, fire escapes or similar accessible locations. Not more than two sets of service-entrance conductors will be connected to an overhead service line, unless written approval has been obtained from the Division Office. Non-metallic conduit used above ground shall be PVC Schedule 80. See Section 5.2 and Figures 7, 8 and 9.

For a residential service installation, including mobile homes, without permanently installed electric space heating, the service-entrance conductors shall have an ampacity not less than 100 amperes.

Where two or more residential service installations without permanently installed electric space heating are combined on one set of service-entrance conductors, the minimum ampacity of the service-entrance conductors shall be as follows:

2 installations 125 amperes
3 installations 150 amperes
4 installations 175 amperes
5 or 6 installations 200 amperes

Where more than six residential service installations are combined on one set of service-entrance conductors, the minimum service ampacity shall be determined by the calculations outlined in Article 220 of the National Electrical Code but shall be not less than 200 amperes.