Running Wire Through Block Wall to Outside?

[AldeanFan]

I'm in the planning stages of changing the layout of my garage and thinking about electrical changes.

It's a Block wall garage. I have a 20a circuit wired with 12ga armoured cable, the first outlet has a GFCI. This is sufficient to run my Lincoln 140 mig and my 2hp compressor.

I'm considering putting the compressor outside in a small shed I'd build against the back wall of the garage. This will free up some floor space and decrease the noise. The compressor is more than adequate right now and I have no desire to move up to a larger compressor, I don't paint regularly, and never sandblast.

To power the compressor in the little compressor room I'd have to run power out there, preferably coming off the 20a outlet inside the garage and going through the wall to a box mounted inside the compressor room.

What's the best way to get power from inside to outside?

Can I just run more armoured cable from a box inside, through a hole in the wall to outside/inside the compressor room?

I"m in Ontario Canada if that's important.

 

[zmaxmotorsports]

Id mount a 4 sq box on each side of wall with a piece of pvc pipe with a connector on each end between them.

 

[simpler=better]

Id mount a 4 sq box on each side of wall with a piece of pvc pipe with a connector on each end between them.

Makes your life easy for like $10

 

[Crusarius]

I know this is completely off topic but thanx for the laugh I thought the title was Running WIFE through block wall

 

[Falcon67]

I'd just punch a hole and use armored MC cable. Why compl8cate it.

 

[rsanter]

Id mount a 4 sq box on each side of wall with a piece of pvc pipe with a connector on each end between them.

This. However if your blocks are filled I would not add the PVC pipe but I would silicone around the wire in the hole

Bob

 

[ford33]

Are you in an area where the conduit between boxes provides the ground connection? If yes, then use armored cable or metal conduit. Or you can run a separate ground wire. Seal the hole and the box perimeter with caulk to keep insects and water out of the exterior boxes.

When you install the airline from the compressor into the shop, use metal pipe and make the hole larger than the pipe to allow for expansion/contraction of the pipe during temperature changes. Use a flexible caulk around the pipe to allow for this movement.

Install a shut-off valve in the pipe run near the outside compressor to isolate it from shop.

Finally, install a ball valve in the bottom of the compressor tank and possibly in the airline going into the garage to allow you to drain water from the tank and pipe. Make them easy to access so you will use them. You don't want water freezing in the tank or in the air line during the winter.

 

[AldeanFan]

Thanks for the reply's,
We use wire with a ground wire - 12-2 wire means 3 conductors.
I'm just in the planning stage right now but I'll likely be doing some electrical upgrades soon so now's the time to plan for the future.