Finally installing my sub-panel! Need some advice... As usual

[Brute440]

I am working on installing my 100 amp sub-panel in my attached garage. I have two recepticals wired for now. (More later) My copper 3-3-3-5 SER should be delivered this Wednesday. What I am asking for advice on is the best way to get it in to the basement...

My plan is to run the SER down out of the sub-panel and through the stud then through the rim joist in to my basement in the bottom left corner of this picture. Has anyone done this? Obviously, I will only get one shot at this so, I am asking before I do it. Does anyone know of a better way to do it?

 

[Norcal]

The cable routing should work. The white conductor needs to be reidentified & the receptacle is upside down, because 30/50A right angle plugs are ground prong up, & the NM cable needs to be stapled closer to the box.

 

[Brute440]

Good to know! Can I reidentify the white wire with a strip of colored electrical tape or what is the best way to do it? I was thinking of getting red colored electrical tape to mark the white wire leg of my 220v. Then using white to mark the common of my SER if it isn't already marked.

 

[Brute440]

Edited, never mind. I misread your comment about the staple. Yep, I will staple it closer to the receptical in the morning.

 

[walrus]

Dont you have to derate SER. 60c column or is that only in insulation?

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[TRWham]

Dont you have to derate SER. 60c column or is that only in insulation?

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As of 201? NEC (somewhere around 2012-2014), only if it is in insulation.

Electrical tape or a marker to identify white conductor as a hot leg.

SER should have a black, red (or black with red stripe), white (or black with white stripe) and bare ground already. Use the white for neutral, 2 colors for the hot legs and bare wire for ground.

I would run the feeder before any more branch circuits as you want no obstacles to routing that heavy cable in the panel, and you might flip the sub-panel so the lugs are on the bottom for a straight shot. I think most indoor panels will allow that.

 

[bigb56]

the receptacle is upside down, because 30/50A right angle plugs are ground prong up.

He has it so close to the floor it might work better the way it is.

 

[Bert_]

I like to use a big chisel tip sharpie to re-mark white wires. I usually have a marker with a little v grove cut in the tip so it only takes a couple swipes to color the wire

 

[Crazyjake8493]

He has it so close to the floor it might work better the way it is.

I would install it whichever way the cord sits better with no awkward bends. The NEC doesn't specify ground orientation on 120V receptacles, and to my knowledge they have nothing regarding 240V either.

 

[Norcal]

I would install it whichever way the cord sits better with no awkward bends. The NEC doesn't specify ground orientation on 120V receptacles, and to my knowledge they have nothing regarding 240V either.

Agreed. But when someone does install a 30/50A recptacle ground prong down it looks hokey.

 

[Brute440]

I flipped the 6-50 receptical as per the suggestions here. The plug on my welder has to be plugged in upside down in the garage that it is in now and it is super annoying. I thought I was mounting this one in such a way that I wouldn't have to flip the plug on my welder over but, I was mistaken.

I also flipped the breaker box upside down as well, that was a great idea! I ran my SER through my floor joist and over to my raceway last night.

Oh man, this SER is some heavy stuff when you are running it on a ladder over head. Think I am going to sit down and take a break for a bit.

 

[Norcal]

The 120V receptacle is required to have GFCI protection, no exceptions.

 

[tinysparky]

The 120V receptacle is required to have GFCI protection, no exceptions.

Why is that? Because it is in the basement?

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[Toothaker]

Why is that? Because it is in the basement?

The OP's first post says "I am working on installing my 100 amp sub-panel in my attached garage", and 125VAC outlets in attached garages have to be GFCI protected per NEC 210.8.

 

[Brute440]

Always learn something new poking around this forum. Swapped the GFCI in this evening.