ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Do we need grounding?

One other thing the NEC allows [ 250.130(C) ]is running a independent ground wire, such as a #10 AWG green, back to the grounding electrode system. This can be a good option when the ampacity of the branch circuit is sufficient for the load and you just need a grounding type receptacle, such as a old 3 wire NM 10/3 cable for a dryer can be converted to a 4-wire NEMA 14-30.