Connector between main and sub

[mike93lx]

Edit: sub is installed. New question in post 15


I am adding a Sub next to my main and want to connect the two with some sort of rigid connector to run the feeder through. I plan to use 4-4-4-6 Al SER.

I've found "box spacer connectors" for 1/2 and 3/4 knockouts, but that obviously won't work. I'd like something like 2" diameter. Length should be around 2". Can someone help me with what I need?

 

[hammlm]

I am adding a Sub next to my main and want to connect the two with some sort of rigid connector to run the feeder through. I plan to use 4-4-4-6 Al SER.

I've found "box spacer connectors" for 1/2 and 3/4 knockouts, but that obviously won't work. I'd like something like 2" diameter. Length should be around 2". Can someone help me with what I need?

How about:
https://www.homedepot.com/p/1-1-2-in-Rigid-Conduit-******-64315/100112701

https://www.homedepot.com/p/1-1-2-in-Rigid-Offset-Conduit-******-04015/100190206


These are both 1-1/2" trade size, but you get the idea. They are available in about any combination of diameter and length you want.

 

[mike93lx]

How about:
https://www.homedepot.com/p/1-1-2-in-Rigid-Conduit-******-64315/100112701

https://www.homedepot.com/p/1-1-2-in-Rigid-Offset-Conduit-******-04015/100190206


These are both 1-1/2" trade size, but you get the idea. They are available in about any combination of diameter and length you want.

Yep, that's it, thanks. A ****** with a couple locknuts should work.

 

[teamextreme]

They are available in about any combination of diameter and length you want.

Offset ******, as linked to above, is what you want. They are not available in different lengths, however. Standard ******* are, but they do allow you to line up knockouts with differing depths from the back of the panel. Offset ******* work perfect for this. Don't forget plastic bushings to put on the ******.

 

[mike93lx]

Offset ******, as linked to above, is what you want. They are not available in different lengths, however. Standard ******* are, but they do allow you to line up knockouts with differing depths from the back of the panel. Offset ******* work perfect for this. Don't forget plastic bushings to put on the ******.

Thanks, that's helpful.

 

[pattenp]

Use individual pieces of thhn wire.

 

[mike93lx]

Use individual pieces of thhn wire.

I already have some leftover cable. Any reason not to just use what I have?

 

[Mr. T]

I already have some leftover cable. Any reason not to just use what I have?

Not really, if you’re talking about function. However, given that it would only be a few bucks worth of THHN, the install would be a bit easier. I’d rather spend a couple dollars on copper wire than a tube of Noalox I’d never use again. Unless you already have some laying around.

 

[mike93lx]

Not really, if you’re talking about function. However, given that it would only be a few bucks worth of THHN, the install would be a bit easier. I’d rather spend a couple dollars on copper wire than a tube of Noalox I’d never use again. Unless you already have some laying around.

I do happen to have some in my toolbox. I was going to make sure it was still good first though. If not, i agree, some #6 thhn would be the right answer

 

[theoldwizard1]

Use individual pieces of thhn wire.

Concur ! Probably 6 gauge copper.

 

[wyliesdiesels]

Since were throwing around wire gauges what size breaker are you using OP?

 

[mike93lx]

Since were throwing around wire gauges what size breaker are you using OP?

Planning on a 125. Its just me, but you never know when i might be welding while the compressor, drill press, table saw, a/c, and a couple angle grinders are running...


Seriously though, a 60a breaker was the plan.

 

[wyliesdiesels]

Planning on a 125. Its just me, but you never know when i might be welding while the compressor, drill press, table saw, a/c, and a couple angle grinders are running...


Seriously though, a 60a breaker was the plan.

Youll need a lot larger wire for 125a...

Also, your main may not be able to support a 125a.

What is the HP rating on the compressor motor nameplate?

Is this a one man shop?

If not and you will have compressor welder and AC running, you will need more than 60a...

 

[mike93lx]

Youll need a lot larger wire for 125a...

Also, your main may not be able to support a 125a.

What is the HP rating on the compressor motor nameplate?

Is this a one man shop?

If not and you will have compressor welder and AC running, you will need more than 60a...

Maybe i should have added an emoticon in that...

I was joking. 60a is plenty. My 100a main panel is full and instead of switching to a bunch of tandems, i'm putting in a 12 space sub.

It will get a few 120v circuits and 240v circuits for a 1/2 hp drill press and a welder.

 

[mike93lx]

So the sub is installed and i used the al SER that i had on hand. 1-1/2" Offset ****** with nuts and bushings on both sides.

New question: Do i need any wire clamps in either/both boxes?

As an aside, i don't really do much with conduit, so i had never worked with 10 stranded thhn before (used it for the welder and heater circuits i put in)... Holy ****, it was so much easier to work with than 10 solid romex.

 

[pattenp]

If the wire is run through a continuous conduit ****** between the two panels there is no need for an internal clamp in the panels where the wire enters the panel.

 

[mike93lx]

If the wire is run through a continuous conduit ****** between the two panels there is no need for an internal clamp in the panels where the wire enters the panel.

Awesome, thanks