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#38618 - 05/27/04 07:28 PM 2,3 pole breakers
seattleman Offline

Registered: 02/01/04
Posts: 17
Loc: Seattle, WA, USA
when a breaker is listed as 2,3pole on a 277, 480 panel, this means it can be used as overcurrent protection of a 3phase 3wire 480 load or a 1 phase 2 wire 277 load (never done this, but make sence to me.

If you only use to hole of a three wire breaker does it matter which two hole you use? I thinking about the balancing of all three phases in the panel. -thanks

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#38619 - 05/27/04 07:37 PM Re: 2,3 pole breakers
Ryan_J Offline

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
Doesn't matter in your scenario. 240.85 comes into play on non-solidy grounded systems though, such as high-impedance grounded, corner grounded, mid point phase grounded and ungrounded.
Ryan Jackson,
Salt Lake City


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