SEU Feeder Cable, Inside Basement, Stapled to Joists

[NP Carling26]

Well, back to the drawing board, sort of. Trying to feed 90A to my detached garage. Was originally gonna use 2-2-2-4 MHF in conduit all the way, but trying to navigate conduit around my cramped and overcrowded (wiring and pipe wise) basement just isn't feasible, so taking a suggestion from my last thread and going to try again. It was suggested to me to install a J-Box somewhere above ground and run the MHF in conduit to that J-Box, then SER the rest of the way through my basement to my panel. I'm figuring on purchasing 4 Polaris Connectors for ease of splicing, not sure whether I wanna put the J-Box on my outside wall or in the basement yet, but either way. Can I staple the 2-2-2-4 jacketed SER cable to the bottom of my floor joists in my unfinished basement? I'm probably going to mount the J-Box outside and run the SER through my foundation inside and run it from there.

Any input or advice is greatly appreciated. Thanks guys.

 

[BillK]

np,
Don't know your exact setup but .... can you just go straight out through the wall and then run conduit ? That's how I did the run to my detached garage. Out through the wall at the main panel at the front corner of the house, pvc conduit along the very bottom of the aluminum siding back to the back corner of the house and then down and underground for 30 feet or so to the front of the detached garage.

 

[NP Carling26]

I attached some diagrams to illustrate what I'm doing.

The Mobile Home Feeder will be in entirely in conduit for the entire run from the sub-panel, underground, up to the J-box.

 

[Mustang51js]

Keep it along the edge by the wall and you will be ok,but you could also drill a 1 1/4 hole and run the wire easy as long as holes are close to being straight with each other

 

[pattenp]

Stapling the cable to the bottom edge of the joist in an unfinished basement is okay because of the of the cable not being smaller than two #6 or three #8 conductors. If drilling holes in joist keep them in the center third of the joist.

 

[burger]

Hello pattenp,

Thanks for taking the time to answer our electrical questions. Like the original poster, I am running 2-2-2-4 SER through an unfinished basement. Ideally I will drill through the joists for my wire run. What is the minimum hole size for 2-2-2-4 SER? Is there a minimum size joist for this hole diameter?


Thanks!
Ed

 

[NP Carling26]

Stapling the cable to the bottom edge of the joist in an unfinished basement is okay because of the of the cable not being smaller than two #6 or three #8 conductors. If drilling holes in joist keep them in the center third of the joist.

Thank you for the answer. Quite relieving, because drilling holes through my ancient floor joists sounds even less appealing than trying to run the conduit.

 

[wyliesdiesels]

http://www.amazon.com/dp/B005GDFGBO/?tag=atomicindus08-20

 

[pattenp]

Hello pattenp,

Thanks for taking the time to answer our electrical questions. Like the original poster, I am running 2-2-2-4 SER through an unfinished basement. Ideally I will drill through the joists for my wire run. What is the minimum hole size for 2-2-2-4 SER? Is there a minimum size joist for this hole diameter?


Thanks!
Ed

Assuming your floor joist are 8 inches or wider a 1.25" hole should be large enough to pull 2-2-2-4 SER cable through without binding and be no issue with weakening the joist. You can fit 2-2-2-4 SER through a 1" bored hole but it's tight. Here's some info for boring holes in joist. http://www.qis-tx.com/newsletter.0605.asp

 

[miner]

Well, back to the drawing board, sort of. Trying to feed 90A to my detached garage. Was originally gonna use 2-2-2-4 MHF in conduit all the way, but trying to navigate conduit around my cramped and overcrowded (wiring and pipe wise) basement just isn't feasible, so taking a suggestion from my last thread and going to try again. It was suggested to me to install a J-Box somewhere above ground and run the MHF in conduit to that J-Box, then SER the rest of the way through my basement to my panel. I'm figuring on purchasing 4 Polaris Connectors for ease of splicing, not sure whether I wanna put the J-Box on my outside wall or in the basement yet, but either way. Can I staple the 2-2-2-4 jacketed SER cable to the bottom of my floor joists in my unfinished basement? I'm probably going to mount the J-Box outside and run the SER through my foundation inside and run it from there.

Any input or advice is greatly appreciated. Thanks guys.

This is exactly what I did, though I used crimp connectors. I also ran the inside cable on the edge along the rim joist. My junction box is outside. Worked out pretty good.

 

[burger]

Assuming your floor joist are 8 inches or wider a 1.25" hole should be large enough to pull 2-2-2-4 SER cable through without binding and be no issue with weakening the joist. You can fit 2-2-2-4 SER through a 1" bored hole but it's tight. Here's some info for boring holes in joist. http://www.qis-tx.com/newsletter.0605.asp

Thank you for your answer! According to the link, maximum hole size is 1/3 the height of the joist and only within the first 1/3 of the span.

Ed

 

[pattenp]

Thank you for your answer! According to the link, maximum hole size is 1/3 the height of the joist and only within the first 1/3 of the span.

Ed

In my first post when I said center third of the joist I should have clarified that was the center third of the height, not span. Usually small holes for wire, 1" or less, aren't a problem beyond the first third of the span. The first third of the span is where you are drilling large holes that may almost be as large as a third of the height of the joist. This becomes a concern when drilling holes for pipes such as waste lines.