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#84657 - 04/18/03 02:35 PM External Enclosure Disconnect  
douggr  Offline
Junior Member
Joined: Mar 2003
Posts: 2
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
douggr@hazelett.com

2017 / 2014 NEC & Related Books and Study Guides

#84658 - 04/21/03 09:11 AM Re: External Enclosure Disconnect  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
The requirement for a disconnect is not dependant on the voltage nor the amperage level.



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