Re: [RE-wrenches] calculating DC voltage line loss

2010-02-21 Thread R Ray Walters
http://www.solarray.com/TechGuides/TGmain_T.php on the right side column, I have an XL spread sheet for volt drop, that allows you to input the voltage (and a bunch of other stuff) I based it on the NEC 2005 book. R. Walters r...@solarray.com Solar Engineer On Feb 20, 2010, at 12:48 PM, Marc

Re: [RE-wrenches] single string of batts: must the interconnects be inverter size cables?

2010-02-21 Thread R Ray Walters
Hi Allan; I with you, I normally downsize the interconnects in parallel strings to 2/0, but keep them the same as the main cables on anything that carries full current, as Phil made clear. On golf cart batteries for instance, two 4/0 parallel lugs won't fit under one battery post, now that most

Re: [RE-wrenches] Best Choice for PV in hot climates

2010-02-21 Thread Doug Pratt
Peter, you're certainly barking up the right tree with thin-film or amorphous solar products in a hot climate, although I have no direct experience with the First Solar products. Amorphous silicon PV in general suffers about half the temperature fade of crystalline PV products. This often makes the

Re: [RE-wrenches] Rennsteig Crimper Tool

2010-02-21 Thread robert ellison
I would think the UL listing would means it s a safe tool to use for the crimps. But with anything use common sense. Bob On Sat, Feb 20, 2010 at 3:15 PM, Doug Pratt wrote: > Rennsteig shared many, many MBs of independent 3rd party test results > using various brands of crimpers with various br

Re: [RE-wrenches] DC voltage drop

2010-02-21 Thread Glenn Burt
William, I also have found your calculator to be a real timesaver. Thank you. Glenn Burt _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob Clark Sent: Sunday, February 21, 2010 3:03 PM To: 'RE-wrenches' Subject: Re: [

Re: [RE-wrenches] DC voltage drop

2010-02-21 Thread Bob Clark
William: I had exactly the same thoughts. I prefer to use the calculator you made. Bob Clark SolarWind Energy Systems, LLC From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, February 21, 2010

Re: [RE-wrenches] DC voltage drop

2010-02-21 Thread William Miller
Greg: I like the field description where you enter the current at "the end of the cable run," as if that is different than the current anywhere else in the run! William PS: I don't see any tools but one that gives ampacity corrected for conduit fill and temperature as well as the voltage dr

[RE-wrenches] DC voltage drop

2010-02-21 Thread Greg Egan
I use this one at http://www.southwire.com/ProductCatalog/voltdrop.jsp I check the single phase box for DC circuits. Best, Greg re-wrenches-requ...@lists.re-wrenches.org wrote: Send RE-wrenches mailing list submissions to re-wrenches@lists.re-wrenches.org To subscribe or unsubscribe

Re: [RE-wrenches] calculating DC voltage line loss

2010-02-21 Thread Windy Dankoff
Thanks Drake. The original article was called Wire Sizing and Voltage Drop in Low Voltage Power Systems". It was in two parts, in HP issues #13 and 14. On Feb 21, 2010, at 9:32 AM, Drake Chamberlin wrote: The Home Power Mag version of this went in my notebook when it first came out, and a

Re: [RE-wrenches] calculating DC voltage line loss

2010-02-21 Thread Drake Chamberlin
The Home Power Mag version of this went in my notebook when it first came out, and a copy still goes with me. It is very useful. At 04:05 PM 2/20/2010, you wrote: Marco, Here's another method that you can print to a sheet of paper. I published this in Home Power in 1989 and it's been widely