Is it permissible to attach the ground conductor to metallic water pipes?
Yes, Article 250.52 of the NEC requires internal metallic water piping to be part of the building electrode system. It also allows for attachment of grounding conductors to “the grounded interior metal water piping system within five feet from its point of entrance to the building.” 19. May I attach a ground wire to the cable clamp at the load side of the electrical meter? A) Yes, this is covered in the NEC; Article 820.100(6)(B)(C) Electrode Connection (referenced to 250.70 Methods of Grounding and Bonding Conductor Connection to Electrodes). The grounding conductor is required to be connected to the grounding electrode by a “listed” connector or clamp. If it is not listed for the intended purpose it cannot be used. 20. You have made reference in previous questions to use of grounding conductors of sufficient ampacity to effectively ground the service cable(s). Please give examples of appropriately sized grounding conductors. A) See NEC Article 820.100(A) Grounding Conductor. Copper g
