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adding a circuit to the garage

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Old Aug 23, 2007 | 01:22 PM
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adding a circuit to the garage

Hi, all -

I think it's time for me to add another circuit to my garage wiring. I've looked at the various online how-tos, and think I have a pretty good idea of what I want to do, except for this little snag: my circuit panel is flush mounted, and I really want to surface-mount the conduit for the new circuit (to make the install easier). Any suggestions on how to do this safely and cleanly?

Thanks...
 
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Old Aug 23, 2007 | 02:29 PM
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When the electricians came and wired my shop they used a wire that is already wrapped in a metal conduit. I dont know the name of it but they sell it at Home Depot and other building supply places. It looks good in my metal building.
 
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Old Aug 23, 2007 | 03:57 PM
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So...is there just a small hole in the sheet rock near your panel? I'm assuming that the conduit is secured on both sides of the wall, right?
 
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Old Aug 23, 2007 | 05:25 PM
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just run the line a short distance in the box to a surface mount junction box and come in the back, then run the conduit from there.
 
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Old Aug 23, 2007 | 06:20 PM
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From: Where's my map???
Originally Posted by chrono4
just run the line a short distance in the box to a surface mount junction box and come in the back, then run the conduit from there.
Ditto that.
 
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Old Aug 23, 2007 | 06:46 PM
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OK...so, any recommendations on the kind of conduit I should use? It's going to have to run about 20 feet, and I'm thinking of making it a 30-amp circuit, just so I have lots of headroom.

Thanks...
 
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Old Aug 23, 2007 | 06:53 PM
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From: Where's my map???
Originally Posted by mzimmers
OK...so, any recommendations on the kind of conduit I should use? It's going to have to run about 20 feet, and I'm thinking of making it a 30-amp circuit, just so I have lots of headroom.

Thanks...
Run #12/3 wire on a piggy back 20 amp breaker. That will give you two twenty amp circuits, instead of running a heavy duty 30 amp.
 
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Old Aug 23, 2007 | 07:15 PM
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I'm not familiar with "piggy backs." What is their "official" name?
 
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Old Aug 25, 2007 | 03:38 PM
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Another question for you all...I found the pre-wired flexible conduit at Home Despot. It looks fine, but I'm not sure how I am supposed to go about securing it. It's too small for even the 1/2" straps. I did find a 3/8" clamp that will take it to the box, but...is that the right way to do this? And is this stuff really OK for surface mounting?

Thanks for the help, guys...I just want to make sure that I do this properly.

mz
 
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Old Aug 25, 2007 | 05:28 PM
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Originally Posted by mzimmers
So...is there just a small hole in the sheet rock near your panel? I'm assuming that the conduit is secured on both sides of the wall, right?
Your talking about BX-cable,good for places that can damage cable.(like steel studs)
Rom-x is the name of the other cable that just vinal or rubber wraped.
 
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Old Aug 30, 2007 | 07:04 AM
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Double check that BX cable. My HD only has it in 14ga & should only be used for fluorescent lights
 
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Old Sep 2, 2007 | 08:07 PM
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It is also known as armored cable.
 
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Old Sep 2, 2007 | 08:15 PM
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I finally decided to use Romex, and put it in some PVC conduit (just for extra security). The Romex was actually cheaper per foot than the four individual wires would have been! Not the easiest thing to push/pull through conduit, though.

Anyway...it's all together and I now have 2 20A circuits running the big stuff in the garage, so no more tripping breakers or seeing the lights dim when I spin up a saw. Life is good...
 
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Old Sep 2, 2007 | 08:52 PM
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From: Where's my map???
The next time you have to run wire thru a conduit. Hook a vacuum to one end, and start feeding string thru it. The vac will suck the string, and now you have something to pull the wire with. If you are planning to pull more wire at a latter date. leave the string for a future pull.
 
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Old Sep 2, 2007 | 10:06 PM
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the 12/3 20 amp on piggy back is I am guessing a double pole breaker 20amps on one circuit and 20 amps on the other circuit. You would use the red and the white for one circuit and the black and the white for the other circuit. this would give you the same as a kitchen plug where one outlet has one plug on the top on one circuit and one plug on the bottom on the other circuit. Just wondering why you would need a 30 amp breaker for?
If you want to run conduit then strap it down punch a hole close to your panel and run it in that way or as was suggested run the wire to a box and take it from there. I do agree that using the BX might be better, but why not come down from the ceiling into your box behind the drywall. Not being able to see the whole setup does make it difficult to answer. If you use the BX don't forget that the clamp that ties it to the panel is different than the usual wire going to the panel.
 
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