Switching Array Leads [RE-wrenches]

Drake Chamberlin Drake.Chamberlin at redwoodalliance.org
Tue Aug 7 16:37:03 PDT 2007


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CORRECTION

The code now requires the neutral lead not be switched, unless it is 
switched as part of a ground fault detection system.

This is too bad, since the Siemens HF 262 disconnect has a 600 VDC 
rating, but only if you can switch both leads.  The NEC rules nip 
this less costly option in the bud.  Nearly $400 for the Square D, 
3-phase disconnect, and $145 for the Siemens 2-pole unit.

According to Siemens, the 2 pole disconnect is good with wind 
systems, to isolate the Windy Boy.  In this case.

Drake 


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