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pole barn sub panel
Eric,
As a Journeman Electrician, you also need a dis-connecting means at the barn, such as a fuseable or non-fuseable safety switch or a small panel with a 30a breaker switch. You must have a means of switching the power in the barn. HTH.
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pole barn sub panel
Eric,
I can't tell you what chapter this reg. is in, my nec is at the shop, but I believe if your sub feeding a panel, you need a dis-connecting means, "unless" your running it less than 50ft. or "within sight" of the panel being fed from. Or, whatever you feel comfortable with. 
I bought some rual property a while back and built a 30x50 barn, I had the local co-op run some primary(800ft. buried) up to a pad mounted xformer(they also set a pedastal meter) which was about 50ft. from the barn. I asked the electrician what the local code was(was'nt sure for that county), for me to bury it into the barn. His response was, "I don't care if you run an extension cord....it's yours now"  . Take care and be safe.
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pole barn sub panel
Cardarnell, I have about the exact same setup. Pad mounted xformer, 400A. pedastall meter next to it. Seperate Feeds going to the house and barn. Both are 3 wire feeds, 2 conductors and a neutral. It does not matter whether it's run in pvc or metel conduit. What does matter is that your service panels are grounded(with ground rod)and the panels must be bonded to this ground. If not, your panel could be energized and not trip the breaker, since your neutral is isolated. The two boxes being bonded together gets you "nothing" at this point, since they are not grounded. Ground those boxes, or you risk the chance of being electrocuted! HTH.
Merry Christmas all!
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pole barn sub panel
KW is right, you must satisfy your local inspector. Just a few years ago my county was using the "CABO ONE and TWO FAMILY DWELLING CODE" for compliance, but just last year they have adopded a new one, "INTERNATIONAL RESIDENTIAL CODE". Both of these publications super-cede the national code books. I will be recieving my 2005 NEC in a few days, email me if intrested and I'll scan and send you what your looking for.
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