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-   -   220V 15A outlet in Garage (http://www.diychatroom.com/f18/220v-15a-outlet-garage-131092/)

curiousB 01-23-2012 09:39 AM

220V 15A outlet in Garage
 
I have a 220V outlet in my garage that I use for a compressor and MIG welder. I wired it in with 2 pole 15A breaker and 14AWG wire in EMT.

My local store only sells the 220V 20A outlet which can accept the 15A and 20A 220V plugs (right side is horizontal slot, left side is T slot).

Is this a code violation to put a 20A outlet when it is only served by 15A circuit? I am thinking its not really a safety hazard because the breaker and branch wiring are sized for 15A.

Just wondering if I should bother changing it?

joecaption 01-23-2012 09:44 AM

Well for one thing 14 wire is to low a gauge for outlets in a garage anyway.
It would have been fine for the lighting.
Should have been 12-2.
How many amps do these tools use.
Even 12 would be very small for a larger compresser or a welder of any size.

Julius793 01-23-2012 10:14 AM

Quote:

Originally Posted by joecaption
Well for one thing 14 wire is to low a gauge for outlets in a garage anyway.
It would have been fine for the lighting.
Should have been 12-2.
How many amps do these tools use.
Even 12 would be very small for a larger compresser or a welder of any size.

Who the hell said garage needs to be 12 AWG?

jbfan 01-23-2012 10:20 AM

Quote:

Originally Posted by Julius793 (Post 832057)
Who the hell said garage needs to be 12 AWG?

Joe did!:jester:

joecaption 01-23-2012 10:26 AM

Want it to pass inspection on my county it had better be 12-2. Been there and had to have the electrition redo it.

curiousB 01-23-2012 11:05 AM

Quote:

Originally Posted by joecaption (Post 832023)
Well for one thing 14 wire is to low a gauge for outlets in a garage anyway.
It would have been fine for the lighting.
Should have been 12-2.
How many amps do these tools use.
Even 12 would be very small for a larger compresser or a welder of any size.


Actually its is a 120V compressor @15A that was tripping the circuit on very cold days (only at startup). The motor has a jumper block to reconfigure for 220V and by doing so the current dropped in half and motor started up much quicker (lower IR losses in lines from panel). It has worked fabulously since going to 220V.

I don't know of any code restriction of mandating 12AWG on a 15A branch wherever it may be.

Anyway I was just asking about the legitimacy of using a 20A outlet on a 15A branch circuit. Is this a NEC code violation?

Jim Port 01-23-2012 11:16 AM

To answer the OPs question, you cannot put the 20 amp receptacle on the 15 amp wiring.

To Joe, Does your insector make up their own rules or is there a local amendment to the NEC? It is not in the NEC to require a 20 amp receptacle circuit for a garage.

Julius793 01-23-2012 11:27 AM

Quote:

Originally Posted by Jim Port
To answer the OPs question, you cannot put the 20 amp receptacle on the 15 amp wiring.

Thanx Jim that's what I thought I just couldn't find it inside can you give me the article number?

Jim Port 01-23-2012 11:44 AM

Try Table 210.21(B)(2).

But who is Joe?

Julius793 01-23-2012 02:28 PM

Quote:

Originally Posted by Jim Port
Try Table 210.21(B)(2).

But who is Joe?

Sorry I meant Jim :laughing:

plummen 01-23-2012 02:32 PM

Quote:

Originally Posted by Julius793 (Post 832057)
Who the hell said garage needs to be 12 AWG?

Joe! :laughing:
Although if I was going to the trouble to wire plugs in a garage I would use a 20a circuit,There I go agreeing with him even though its not a code requirement! :laughing:

plummen 01-23-2012 02:37 PM

If youre running a lot of stuff like compessors and welders in your garage have you thought about possibly just adding a sub panel in the garage to make it easier to upgrade your wiring out there as you add more big tools to your play area? :)

jasin 01-23-2012 03:07 PM

Quote:

Originally Posted by curiousB (Post 832111)
its is a 120V compressor @15A

15A circuits only require 14 gauge wiring unless there are significant voltage drop.

jasin 01-23-2012 03:16 PM

I notice a lot of people on here still say 110 and 220 but that's incorrect. The nominal voltage in the USA is 125 and 250.

Julius793 01-23-2012 03:18 PM

Quote:

Originally Posted by jasin
I notice a lot of people on here still say 110 and 220 but that's incorrect. The nominal voltage in the USA is 120 and 240.

Yes and they will continue to do so :)


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