Equipment disconnects in Wisconsin

[Fallriverbryan]

So this is my 1st post on the forum. I do the electrical installation on equipment in our fabrication shop. We are relocating two air compressors during a shop remodel. To save on installation costs am I allowed to use plugs and receptacles as a disconnection means on those 2 air compressors?

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[JFletcher]

Welcome. What size/HP are the compressor motors? an $8 unfused 60A Midwest disco is going to be cheaper and faster than putting a cord on the compressor and mounting a receptacle. I'll have to check the book to see if that's a legal means to do so.

 

[Fallriverbryan]

Welcome. What size/HP are the compressor motors? an $8 unfused 60A Midwest disco is going to be cheaper and faster than putting a cord on the compressor and mounting a receptacle. I'll have to check the book to see if that's a legal means to do so.

10hp. One part of the discussion was having 3 compressors in room with 2 outlets. Just plug in backup compressor during maintenance when needed. 2 have disconnects so initial cost is reduced going that route. My solution was installing sub panel in room. Future remodel, equipment additions would then be covered. Two 30 amp circuits power the existing setup. Relocation to new room is 15 feet. Power from main panel is 120 feet, but conduit is already in place. I'll let the boss decide. Was really just curious if the plug in disconnect was per code.

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[packersparky]

From the 2011 NEC:

(F) Cord-and-Plug-Connected Motors. For a cord-andplug-
connected motor, a horsepower-rated attachment plug
and receptacle, flanged surface inlet and cord connector, or
attachment plug and cord connector having ratings no less
than the motor ratings shall be permitted to serve as the
disconnecting means. Horsepower-rated attachment plugs,
flanged surface inlets, receptacles, or cord connectors shall
not be required for cord-and-plug-connected appliances in
accordance with 422.33, room air conditioners in accordance
with 440.63, or portable motors rated 1⁄3 hp or less.

 

[Fallriverbryan]

Thx pack
I read the section of the code. Seems pretty straightforward. Would most likely use a L1630 nema plug and receptacle if we go that route. All told, it seems to me, using disconnects would be the cost effective way to go.

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