Re: [RE-wrenches] sizing a sub-panel used to combine multipleinverter outputs

Opps! My bad, I was thinking of a single phase system, not the three phase system shown in the article. For the three phase system Kent is correct in counting 180A of supply per bar. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverter outputs

I think Kent and I agree. For the case where the subpanel is not dedicated a PV sub-panel he is calculating for 2 - 50A breakers and I calculated for 3 - 50A breakers. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverter outputs

Per 705.12(D) the sub-panel could be any distribution equipment on the premises. So the question becomes: is the sub-panel capable of supplying branch circuits or feeder loads? If yes, then the sum of the breakers (potentially) feeding the bus is 180 amps so a 150-amp rating is required and the

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverteroutputs

Al, The sub panel can be rated at 80A. With no other loads in the subpanel, 80A is the most that could flow out past the 80A breaker. If you had other loads in the sub-panel, then it would have to be no less than (50+50+50+80)/1.2 or 200A. Note from 2008 690.64 (B) that the sub-panel is NOT

[RE-wrenches] sizing a sub-panel used to combine multiple inverter outputs

Hi Wrenchers, When using a sub-panel for the sole purpose of combining the output of multiple single phase inverters does NEC 690.64 (B) (2) apply? I know that this topic has been discussed but I am still not clear. The "Can we Land" Article pg 11 Diagram 2b shows that using a Subpanel elimin

Re: [RE-wrenches] Expansion joints

Peter,   Cooper makes one for 1.5" emt, not sure if it is rated for wet locations or not.   part #XJG54 EMT, it allows for up to 4" max of conduit movement.   Jamie Johnson NABCEP Certified PV Technical Sales Professional NABCEP Certified Solar PV Installer   General Manager SOLAR POWER ELECTRIC

Re: [RE-wrenches] Panduit C-TAP (now crimping tools and taps)

Hi Carl - I've attached the Wrenches list here because it seems like info others might be interested in Yes, the CT-1700 is a good choice for smaller crimps common on most residential work. Also, we've since switched over to sourcing Greenlee tools because they are cheaper and easier to sourc

[RE-wrenches] Expansion joints

Does anyone have information (manu and part number) for expansion joints for 1-1/2 EMT? I have also heard that many EJs are designed for rigid conduit (RMC) and may not be directly applicable to EMT. - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., L