SERVICE ENTRANCE CONDUCTORS

  1. The ungrounded conductors need to provide an ampacity of not less than 100 amps, 3-wire for service to a one-family dwelling with 6 or more 2-wire branch circuits. NEC 230-42, 230-79.

  2. Ampacity of Services & Feeders (120/240 Volts, 3-Wire, 1-phase): Go to Table!
  3. The Grounding Electrode Conductor (GEC) is sized for the Grounding Electrodes provided. NEC, Table 250-66. GEC Sizing based on Grounding Electrode- NEC 250-94., PanelBoard Anatomy

  4. Identifying Grounded Conductors: See NEC 200-6.

  5. Service Conductors clearance from Building Openings, NEC 230-9: Not less than 3 ft. from windows.