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This article was posted 03/10/2006 and is most likely outdated.

Grounding vs Bonding: 250.80 Service Enclosures

March 10, 2006

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PART IV. GROUNDING (BONDING) OF ENCLOSURE, RACEWAY, AND SERVICE CABLE

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250.80 Service Enclosures.

Metal raceways and enclosures containing service conductors must be grounded (bonded) to an effective ground-fault current path [250.4(A)(5)].

Exception: Metal elbows having 18 in. or more of earth cover aren’t required to be grounded (bonded) to an effective ground-fault current path. Figure 250–122

Figure 250–122
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Comments

I think using EMC Elbow is a good idea as far as pulling wires but what will happen on the long run for that steel elbow being under ground. Is in it going to rust and were out. And then affect the wire inside the raceway. If any of you know the answer for that one please advice.

Michael Darwish

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