Multiple outlets on 220

dunk6666April 11, 2013

I am working on plans for adding 220 outlets to my garage. I have a table saw, band saw and another tool that needs 220. If I know that they will never be powered on at the same time, can I install three outlets on the same circuit run? Like a standard run of 110 receptacles. It will be a 20 amp circuit.

Thank you for reporting this comment. Undo
bus_driver

Yes, multiple outlets are permitted on the same circuit. When the proper overcurrent device (circuit breaker is one example) is used, it will operate if the circuit is overloaded. I recommend that air compressors be on separate circuits since they often operate coincident with other loads.

    Bookmark   April 11, 2013 at 2:04PM
Thank you for reporting this comment. Undo
brickeyee

You my get away with it depending on the motor starting loads.

It is NOT a violation, but a separate article for motors (Article 430) allows their breaker size to be divorced from the conductor size to allow starting.

The wring needs to be 120% of the motors full load running current, from a HP table in the NEC (NOT the motor nameplate).
A typical inverse time breaker is then allowed to be larger than the wire size fr general purpose circuits by a couple hundred percent.

A motor that has a full load current of 15 amps would need wires rated at 18 amps, so #12.
The breaker might need to be 30 amps (or more) to allow for reliable motor starting.

The breaker is there only to protect against shorts in the wiring.

The motor has its own internal thermal protection that prevents it from overloading the wire.

The AHJ might have an issue with the breaker not matching ALL the motors that could use the circuit.

I mark the switch plates "MOTOR ONLY" just out of habit.
Maybe it will keep the next owner from just jamming any ole' 240 V load in there.

    Bookmark   April 11, 2013 at 4:02PM
Sign Up to comment
More Discussions
Looking for Ideas For Lighting at base of 300' long driveway
Sorry for the "picture through the screen"...
dixieman
Too much load for circuit?
I have 200 amp service to the main panel (which has...
zver11
Does a refrigerator need to be on a separate circuit?
Does a refrigerator need to be on a separate circuit?...
rontero
Motion sensor that doesn't click
I have a motion sensor very much like the picture attached...
drmeow3
Help with 240V 50A location
I'm trying to do a challenging kitchen layout. I will...
12crumbles
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™