article 225-30

[shocker3218]

Am wiring a group of storage units. Power source is 120/240 volt. As I read article 225-30 it states that a disconect is required at each out building (in my case the service is located on building #1, with branch circuits going to buildings 2,3 and 4) When anything more than a multiwire branch circuit is used. I have only 2 circuits, 1 for lighting, and 1 for a receptacle - both are 120 volt 20 amp.


My question is, what if I were to pull an additonal circuit to each building for inside lights? Since inside wiring is outside the scope of article 225, am I still required to use a disconnect?

On a similar note, if I have an out building (like a garage) that has no lights or wiring on the outside of it, am I required to have a disconnect on the branch circuits that feed the inside wiring? (could I legally run 3 or more branch circuits from the panel in the house without having a disconnect means for any of them in the garage?)

 

[curt swartz]

Re: article 225-30

A disconnect is required even if you only have one circuit to the building. If you run a single multi-wire circuit you don?t have to install a grounding electrode.

 

[shocker3218]

Re: article 225-30

what code section do I need to refer to for the need to use a disconnect even if only one circuit?

[ September 06, 2004, 10:56 PM: Message edited by: shocker3218 ]

 

[hurk27]

Re: article 225-30

What you want is located in the 2002 NEC 225.30 Thu 225.40

When you say each out building do you mean each storage unit is a separate buildings or are they attached to each other as in a row of buildings?
If these buildings are attached to each other they should be considered as one building, then the service panel in unit #1 would be sufficient.

 

[shocker3218]

Re: article 225-30

total of 4 buildings. Some with 6 storage units, others with as many as 30. Not attached to each other in any way. 225.30 thru 225.40 are the articles I read for my initial post. Only apply to wiring on a building, not within.

[ September 07, 2004, 02:09 AM: Message edited by: shocker3218 ]

 

[curt swartz]

Re: article 225-30

225.31 Disconnecting Means. Means shall be provided for disconnecting all ungrounded conductors that supply or pass through the building or structure.

 

[shocker3218]

Re: article 225-30

I guess I'm trying to read too much into this article. It really looked as if the entire article is only for wiring and lighting on a building. "on" implies on the outside to me, therefore I was reasoning that none of the article could apply to wiring "within" a building. In other words, I read it to mean that a disconnect as mentioned in 225-31 was only required for outside outlets and wirng, not wiring internal to the building.

 

[hurk27]

Re: article 225-30

It covers the wiring from the house service panel to the out building's disconnect/'s Which can be just inside the out building. After the disconnect then it's back to inside wiring methods and requirements. Read 225.31 or 225.32 It clearly states outside or inside or running through the building.

And it does mean the conductors that supply the building:

225.31 Disconnecting Means.
Means shall be provided for disconnecting all ungrounded conductors that supply or pass through the building or structure .

I highlighted it so you can see it.

[ September 08, 2004, 01:39 AM: Message edited by: hurk27 ]

 

[don_resqcapt19]

Re: article 225-30

Shocker,
Look at the scope of the Article.

225.1 Scope.
This article covers requirements for outside branch circuits and feeders run on or between buildings, structures, or poles on the premises; and electric equipment and wiring for the supply of utilization equipment that is located on or attached to the outside of buildings, structures, or poles.

You are running a feeder between buildings, and therfore Article 225 applies. You are correct that in general this article does not apply to the wiring within the second building, but the feeder to the second building requires a disconnect at that second building. The disconnect requirement is within the scope of Article 225.
Don