Originally posted by George Little
My answer would be we need an electrode at the separate building based on 250.32 and this points us to Part III and 250.52 now an electrode consisting of a rod needs to be <25 ohms based on 250.56 and if not less than 25 ohms, most contractors will simply add another rod.
Let’s take a closer look at 250.32
250.32(A) Grounding Electrode. Building(s) or structure(s) supplied by feeder(s) or branch circuit(s) shall have a grounding electrode or grounding electrode system installed in accordance with 250.50. The grounding electrode conductor(s) shall be connected in accordance with 250.32(B) or (C). Where there is no existing grounding electrode, the grounding electrode(s) required in 250.50 shall be installed.
The only referral to a grounding electrode found in 250.32 is to 250.50. In 250.52 we are instructed to install one of the electrodes found in 250.52.
No where in either section 250.50 or 250.52 does it refer us to 250.56 for 25 ohms or less nor to 250.53 for the supplemental electrode for a metal water pipe.
I have submitted a proposal to have the reference to 250.50 removed and replaced with (Part III of 250).
As presently worded only one rod at a second building can be enforced.
[This message has been edited by jw electric (edited 11-04-2005).]