The use of structural metal as a grounding electrode is an issue that has been revised during several recent Code cycles. The 2011 NEC has once again revisited the rule explaining when a structural ...
All questions and answers are based on the 2011 NEC. Q. What are the grounding electrode requirements for a separately derived system, such as a transformer? [250.30(A)(4)] A. First of all, let’s ...
The National Electrical Manufacturers Association has published ANSI/NEMA GR 1-2007 Grounding Rod Electrodes and Grounding Rod Electrode Couplings. The National Electrical Manufacturers Association ...
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