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-   -   Connecting conduit to subpanel (http://www.diychatroom.com/f18/connecting-conduit-subpanel-33222/)

xv144 12-05-2008 05:00 PM

Connecting conduit to subpanel
 
I am installing a 125AMP subpanel in my garage (details at http://www.diychatroom.com/showthrea...361#post190361). I will be backfeeding a 60AMP breaker. What is the proper way to connect the 1" PVC conduit to the box?

jerryh3 12-05-2008 05:07 PM

A male thread with a locknut and bushing.

xv144 12-05-2008 06:21 PM

Quote:

Originally Posted by jerryh3 (Post 194396)
A male thread with a locknut and bushing.

Nothing needed to clamp the wire? Of course I really don't see how it could move (85' of 6AWG THHN in conduit). I know running 12/14 gauge wire in my main box I always secure the wires in the holes where they enter.

jamiedolan 12-05-2008 06:24 PM

Quote:

Originally Posted by xv144 (Post 194432)
Nothing needed to clamp the wire? Of course I really don't see how it could move (85' of 6AWG THHN in conduit). I know running 12/14 gauge wire in my main box I always secure the wires in the holes where they enter.

THHN in conduit does not have anything like a clamp to secure it. It comes loose out of the conduit into a approved junction box or switch panel box.
Use the locknut and bushing.
jamie

J. V. 12-06-2008 11:42 AM

Use a 1" connector and a 1" locknut. The bushing is optional.

jerryh3 12-06-2008 04:53 PM

1 Attachment(s)
Optional?

rgsgww 12-06-2008 06:34 PM

:no: Its required.

chris75 12-06-2008 07:40 PM

Quote:

Originally Posted by rgsgww (Post 194854)
:no: Its required.

code reference? I agree if the wire size is #4 or larger... but thats it.

rgsgww 12-06-2008 07:49 PM

Quote:

Originally Posted by chris75 (Post 194881)
code reference? I agree if the wire size is #4 or larger... but thats it.


Oh, never mind. All you have to do is ream the conduit, right?

Yeah, I can see where its a good thing with large wires.

jbfan 12-06-2008 11:27 PM

Don't forget a breaker hold down for the backfed 60 amp breaker!

xv144 12-07-2008 07:30 AM

Quote:

Originally Posted by jbfan (Post 194978)
Don't forget a breaker hold down for the backfed 60 amp breaker!


The alleged electrician at HD never heard of these, and I cannot find one on the Internet. Do they go by another name?

xv144 12-07-2008 07:38 AM

Thanks guys. I connected it yesterday. Cost $2 for the 2 extra PVC parts.

jerryh3 12-07-2008 07:54 AM

Quote:

Originally Posted by xv144 (Post 195036)
The alleged electrician at HD never heard of these, and I cannot find one on the Internet. Do they go by another name?

Square D' official name is "Back-Fed Main Hold-Down Bracket." Which panel did you end up using?

xv144 12-07-2008 08:18 AM

Quote:

Originally Posted by jerryh3 (Post 195042)
...Which panel did you end up using?

Square D QO QO124L125G LOAD CENTER - $55 on Ebay for brand new with cover and ground bar.


jerryh3 12-07-2008 09:05 AM

Quote:

Originally Posted by xv144 (Post 195045)
Square D QO QO124L125G LOAD CENTER - $55 on Ebay for brand new with cover and ground bar.

I'm pretty sure it's this one: the PK4MB2LA
http://ecatalog.squared.com/pubs/Electrical%20Distribution/Load%20Centers/Accessories,%20Homeline%20(HOM,%20LK,%20PK,%20QOM)/1100HO9902.pdf
There should be a sticker inside the box with the approved parts listed.


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