[RE-wrenches] NEC 690.10(C) talking points

[Exeltech]

> ... we've found that running a 240 welder off 2 stacked Trace SWs gives a lot more oomph than off a 6kW generator.

Altitude is indeed a factor.  So too is the vastly superior transient response of the inverter compared to a genset.  Poor transient capability is one reason (of many) that make gensets a lousy power source at outdoor concerts.


Dan


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On Thu, 3/20/14, Dan Fink <danbob88 at gmail.com> wrote:

 Subject: Re: [RE-wrenches] NEC 690.10(C) talking points
 To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
 Date: Thursday, March 20, 2014, 8:10 AM

Hello all;

Thanks for clearing that up. 

My potential client was reading the Mike Holt book that has slightly different wording than NEC, asked the question, and it confused me. I'll let him know that section simply allows us to use 120/240 panels with a single 120v inverter. Interestingly enough, at our off-grid shop we've found that running a 240 welder off 2 stacked Trace SWs gives a lot more oomph than off a 6kW generator. Being at 8200 ft elevation doesn't help the generators performance either.

Dan Fink