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#84657 - 04/18/03 11:35 AM External Enclosure Disconnect
douggr Offline
Junior Member

Registered: 03/27/03
Posts: 3
Loc: Colchester, VT 05446
Quick question....

I was just reading NFPA 79 concerning supply circuit disconnects. What I would like to know is, is there a minimum voltage that an external disconnect (e.g operating handle connected to a molded case circuit breaker) is required? I have always seen them used on enclosures with 380/460/480 vac. But would an enclosure that has an incoming supply voltage of 110vac be required to use such a device? What about 220vac?
Doug Greig

2014 / 2011 NEC & Related Books and Study Guides
#84658 - 04/21/03 06:11 AM Re: External Enclosure Disconnect
JBD Offline

Registered: 07/12/01
Posts: 599
Loc: WI, USA
The requirement for a disconnect is not dependant on the voltage nor the amperage level.


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