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Old 12-11-2017, 03:39 PM
 
838 posts, read 523,837 times
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Hey all, just a quick question for the state of colorado on running cable as a feeder.

I am making a shed detached and want to feed a subpanel in the shed - from my main panel in the garage (which is about 70 feet away; so main panel will feed sub panel in the shed).


not sure in colorado if we need to use URD cable to feed a sub panel, or can we use UF-B 10-3 cable to feed a sub panel through direct burial?

I plan on using a double pole 30 amp breaker with 10-3 UFB AWG wire (from the garage main panel) to feed a 70amp sub panel (in the shed 70 feet away) but I am not sure if in Colorado we can use a 10-3 with a double pole 30 amp to feed the sub panel in the shed
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Old 12-11-2017, 08:08 PM
 
1,059 posts, read 1,635,241 times
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I currently have a heated 24x32 outbuilding about 50' from my house that I installed an underground power feed into from the house using 6/3 UF. It's fed by a 60amp 220V breaker in the main house & also has it's own 60amp breaker in the sub panel. Colorado electrical code (and NEC) requires a safe means of disconnect at the sub panel so the 60amp breaker in the subpanel was insisted upon by the state inspector.

NEC now also requires a ground rod driven outside the shed with a #4 copper connection tied to the ground bar in the subpanel. I had to drive an 8' copper ground rod flush to the ground into rock & hard clay. What fun that was!

I just did all of this 2 years ago so it's fresh in my mind. The NEC received a major update in 2014 with many changes that a home electrician would not be aware of. Colorado codes mirror the NEC so just stay in line with NEC & you'll be fine. You should also get a permit.

https://www.colorado.gov/pacific/dor...umbing_Permits
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Old 12-12-2017, 05:48 AM
 
838 posts, read 523,837 times
Reputation: 487
i appreciate it!!

I might as well go with a 60 amp double pole then and buy a 60 subpanel with #6-3 wire.

was your 6/3 wire buried in conduit? or just bare at 24 inches?
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Old 12-12-2017, 08:48 PM
 
1,059 posts, read 1,635,241 times
Reputation: 1928
Quote:
Originally Posted by willc86 View Post
i appreciate it!!

I might as well go with a 60 amp double pole then and buy a 60 subpanel with #6-3 wire.

was your 6/3 wire buried in conduit? or just bare at 24 inches?

Bare at 24" deep. UF is designed for direct burial.

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