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Country Talk Discussion Board

Re: 3 wire verses 4 wire [question for jimbob]

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Posted by Farmer Tom on March 04, 2003 at 06:31:22 from (

In Reply to: 3 wire verses 4 wire [question for jimbob] posted by fredo on March 03, 2003 at 13:01:34:

I know a lot of folks do not like "Codes", but I would recommend all those with agricultural buildings, especially those with animals in them (also for human safety), take a real hard look at the National Electical Code - 2002 (NEC), a.k.a.-NFPA 70-2002, Article 547 - "Agricultural Buildings." "Grounding" and "Bonding" are very important items in this Article and especially Section 547-10 dealing with "Equipotential Planes and Bonding of Equipotential Planes." Shock occurs when there is an electrical potential difference present and 'you' or 'animal' make the connection between it. I hope it helps with understanding the 3-wire/4-wire situation too.

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