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Change 30 amp circuit to 50 amp.

I have a 4 wire 30 amp circuit in my garage. It is right behind my panel. Given it is for 14-30 outlet, can I just replace the breaker to 50 amp and put a 14-50 nema? Would the cable be able to handle 14-50 given it is rated for 14-30 outlet? 
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Posted 2017-09-25T17:50:28+0000  by Yogesh Yogesh
Hi Yogesh,

I believe you will have to jump up to the next larger wire size to handle the additional amperage. 
30 amp circuits use a 10 gauge wire, while 50 amp circuits require larger 8 gauge wire. Consult with your local building department or a licensed electrical contractor before making the change. Better to be safe than sorry, a overload on a circuit that powerful can cause a major fire.

Posted 2017-09-25T19:48:54+0000  by Mike_HD_OC
You can not just change the breaker and receptacle without checking the wire size and type.  If the circuit is wired with NM-B copper cable, it would need to be at least 6 gauge to support a 50 amp. circuit.  If you have copper type SE or THHN then you could use 8 gauge.

If you are uncertain about any of this, then you should consult a licensed electrician.
Posted 2017-09-26T08:47:10+0000  by Adam444
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