Installing 480V outlets outside at a commercial site, but I was wondering if these needed to have a local disconnect switch for each outlet based in the NEC code. I cannot find anything, but want to make sure I am not missing something. The outlet is rated 480V 3PH 30A.
Is it required to have a local disconnect switch for a 480V Outlet
- Thread starter EEPithon
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Coppersmith
Senior Member
- Location
- Tampa, FL, USA
- Occupation
- Electrical Contractor
Is it a 480V receptacle or is it hard wired to a device? If it's a receptacle, unplugging the device counts as a proper disconnect method.
I'm assuming you can turn the device completely off before disconnecting. I wouldn't want to disconnect under load. In that case, I would add a disconnect switch.
I'm assuming you can turn the device completely off before disconnecting. I wouldn't want to disconnect under load. In that case, I would add a disconnect switch.
- Location
- Illinois
- Occupation
- retired electrician
Many industrial safety departments require a line side disconnect switch for all 480 volt receptacles.
It is a receptacle.
I figured they might want it as a safety precaution, but wanted to know if there was any code on it. Thank you.
- Location
- Illinois
- Occupation
- retired electrician
Some of them are interlocked devices...you have to insert the plug before you turn the disconnect on, and you can't remove the plug until you turn the disconnect off.
David Castor
Senior Member
- Location
- Washington, USA
- Occupation
- Electrical Engineer
Not an NEC requirement that I know of.
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