Receptacle size

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Rockyd

Rockyd

Senior Member
Location
Nevada
Occupation
Retired after 40 years as an electrician.
Working on a major hotel kitchen and looking for a chart that defines what receptacle needs what size mud ring - single gang, or double gang?

There is a NEMA WD2 2002 paper on the issue, but they want $150.

Anyone know where I can get chart that matches mud ring to receptacle?

Talking about all kinds of match ups here, potentially up to 50 amps, single and three phase equipment.
 
If it's a major job, it should have prints.

If it's got prints, it should have E-sheets.

If it's got E-sheets, it should have an equipment schedule.

If it's got an equipment schedule, it should have the electrical characteristings for said equipment.

With those electrical characteristics, you can figure out what it needs for a receptacle (20a 120v, 50a 3phase....)

Once armed with that knowledge, you can figure out your mud ring.
 
No disrespect 480, but this is one of those projects that to get an answer will take a couple of weeks up and down the chain of command. Sheetrockers are coming Tuesday or Wednesday to our area (The project has 64 floors).So it is faster, and quicker off the forum if I a can find chart (for less than $150). I keep thinking anything three phase and larger than a typical dryer (L14-30) is going to be a double gang.
 
IMHO, it would be safe to assume anything larger than a 1? 220v 30A plug will need a 2 gang ring.

If I recall, the '08 has some language in regards to this as well.....looking now....

EDIT:
314.6(B)(4)
314.24

Give them an eyeballing.
 
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If you have one of those Hubbell sliding-part-number-finders for receptacles it will have Hubbell part numbers for cover plates. For smaller receptacles it will list a single gang cover plate size, and for larger receptacles it won't list a single gang cover plate part number, so it would be safe to assume it take a 2 gang box at that point. On twist locks you go to 2 gang at 120V 30A, but I'm not sure about straight blade devices - I don't use straight blade devices over 20A.
 
Took a peek. The company is smart about boxing, all of it is 4/11 deeps. The ugly part would be having a cord cap that plugs into a single gang ring, and have a double gang ring on already!

Guess if you've never done anything wrong, you've never done anything!

Looks like it might be a "wing it" day on Monday.
 
Thanks JD maybe I can order one of those up. I looked in my 05 NECH,but it only has the NEMA 6WD 1997 chart.
 
jdsmith said:
If you have one of those Hubbell sliding-part-number-finders for receptacles it will have Hubbell part numbers for cover plates. For smaller receptacles it will list a single gang cover plate size, and for larger receptacles it won't list a single gang cover plate part number, so it would be safe to assume it take a 2 gang box at that point. On twist locks you go to 2 gang at 120V 30A, but I'm not sure about straight blade devices - I don't use straight blade devices over 20A.
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similiar I went to Pass & seymour's website found a download for commercial receptacles,, it showed the rceptacle by amperage/voltage and you could see which were two gang.
 
Thanks Celtic. My machine is slow, but it is getting there.
 
Rockyd said:
No disrespect 480, but this is one of those projects that to get an answer will take a couple of weeks up and down the chain of command. Sheetrockers are coming Tuesday or Wednesday to our area (The project has 64 floors).So it is faster, and quicker off the forum if I a can find chart (for less than $150). I keep thinking anything three phase and larger than a typical dryer (L14-30) is going to be a double gang.
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When in doubt go with a double ,you are still days away from finished walls so you will have time to research I am surprised this was not done during take offs.
 
Rewire said:
When in doubt go with a double ,you are still days away from finished walls so you will have time to research I am surprised this was not done during take offs.
Click to expand...

I'd say the opposite. I've managed to replace 1g mud rings with 2g even in a finished wall. It's a one-way street, though. Hard to cover up a 1g device in a 2g mud ring.
 
I was approaching from the standpoint that you would be more likely to need a double for certain receptacle types if you were not sure.You can always replace them and tell the mudder that the guys hanging the rock cut it wrong.
 
My advice is to get at least one receptacle in each size required. This way, you know for sure. Probably make sure that it is the same brand and model just to be sure.
I've run into this problem when I built two Targets by myself. Despite ordering a Pass & Seymore catalogue, I still got one wrong. It is easier to go from an incorrect single gang to a double gang than vice versa.
You have possibilities of 4 square or 4-11; single or double gang.
~Peter
 
Thanks everyone for weighing in. I went to the WD-6 2002 chart on the final pages (141 - 144). It was easier to see in the 05 NECH section 408 as to the sizing. The size on the chart is indicative of the receptacle.

Good news - I survived a thirteen man lay-off at the compay I work for. I might be "the next one", if I blow the receptacle size issue!
 
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