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Reply by CaptainKlutz

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Posted on Is it possible to run a 2hp Dust Collector and Saw on a single 240v/30amp dryer circuit?

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CaptainKlutz

4886 posts in 2734 days


#1 posted 03-29-2021 08:58 PM

- Yes.
Per NEC 430, need 125% of FLC (not FLA) for a motor circuit. (2) 2HP motors have 12A FLC * 125% = 30A

- NEC code only allows multiple receptacles on 20A building wire circuits.
Can not make a permanent circuit with more than one 30A receptacle, though you can permanently connect more than one machine with dedicated wiring to a circuit greater 20A, that meets code requirements.

You can use a temporary cable with 30A plug, and several 15/20A receptacles.
Leviton makes this easy with a #5822 duplex 2 wire 240v 20A receptacle. They also make #16462 Decora version. Can place one of these in an outdoor junction box, and use 10-3 SOOW cable with a 30A matching dryer plug on end. If cord length exceeds 120ft, then suggest 8-3 SOOW cord to avoid voltage drop.

PS – Not an licensed electrician. Only a EE that has played with power and learned some codes.
If any of the above does make sense, hire a professional to help you.
YMMV

-- If it wasn't for bad luck, I wouldn't have no luck at all, Doom, despair, agony on me… - Albert King - Born Under a Bad Sign released 1967


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