kolega
Member
- Location
- champlin mn
i have a 400 amp service on the side of the house with 2 200 amp disconnects. i need to run power from one of those disconnects to detached shop which is about 175 feet away can i use direct burial wire?
Unless you are on prior to 2008 NEC there is no longer a choice - must be separate equipment grounding conductor - exception is only for existing installations, and still has conditions before it is allowed. Grounding electrode is needed at the separate structure as well regardless of whether you have three or four wire feed.i was thinking about pvc but its gonna be a lot more expensive and time consuming. i actually talked to inspector and he said it was fine to run 3 wire as long as i pond the ground rod on the shop side. any thoughts on that?
I was thinking more like doing 320amp meter with 2 200 amp breakers servings as disconnects than do 200 sub panel inside the house and one 200 amp panel for the shop. Than I guess my wires to the shop are becoming feeders so they will have to be 250kcmil or they could still be 4/0?
What would be my best option?to do meter with 2 200 amp breakers serving as disconnects or should I buy meter with 2 separate 200 amp disconnects
:thumbsup:I would do as kwired said and use the double lugs on the meter to feed two 200A disconnects, one at the house and one at the garage/shed or whatever you're calling the other building.
This is NEC compliant for residential.
The conductors to each building would be service entrance conductors and not feeders. Then you only need 3 wire.
Each building's supply disconnects (service or feeder supplied) - yesBut aren't all the disconnects suppose to be grouped together at one spot?
But aren't all the disconnects suppose to be grouped together at one spot?
Exception No. 3: A single-family dwelling unit and a separate
structure shall be permitted to have one set of service entrance
conductors run to each from a single service drop
or lateral.
I was thinking more like doing 320amp meter with 2 200 amp breakers servings as disconnects than do 200 sub panel inside the house and one 200 amp panel for the shop. Than I guess my wires to the shop are becoming feeders so they will have to be 250kcmil or they could still be 4/0?
You need a a grounding electrode at every structure regardless or whether it is supplied by service or feeder conductors.the guy is trenching for gas and water to the shop anyways so ill just throw it in there at like 3 feet down. i finaly made up my mind on service im gonna do 400 amp meter with 2 200 amp breakers built in for disconnects than run 250 250 250 3/o to the shop and pond the ground rod by the main breaker panel there. and for house ill run 3/0 3/0 3/0 and #4 for ground in 2 in pipe.