ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
by gfretwell. 03/24/18 02:10 AM
Recall Notice Kidde Smoke Alarms
by dougwells. 03/22/18 01:40 PM
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 4 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Solar Installation 10KW #194145
05/12/10 11:49 PM
05/12/10 11:49 PM
DGSparky  Offline OP
New Member
Joined: May 2010
Posts: 5
GTA Ontario, Canada
Currently I am looking at a 10KW solar install. The plan is to install 2 string inverters (5KW ea.) at the house 350ft away from the panels. This would involve 4 DC circuits at about 355V each. Full load current would be about 8 amps. I plan on using 8 runs of 1/0 RW90 cable (4runs x 2 wires/cct) I figure this would be about a 3.5% volt drop. Additionally this would all go in one 4 inch PVC conduit underground. I have never installed DC circuits of this high voltage before, does anyone have any thoughts or considerations on this setup and on working with high voltage DC circuits?

2017 / 2014 NEC & Related Books and Study Guides
Re: Solar Installation 10KW [Re: DGSparky] #194155
05/13/10 10:49 AM
05/13/10 10:49 AM
ghost307  Offline
Joined: May 2005
Posts: 934
Chicago Illinois USA
Make very certain that you understand exactly how to wire equipment when using DC. For example; disconnects and safety switches get connected very differently for DC than for AC.

And never forget that there will be DC coming from the panels from the instant that they are taken out of the box. The only way to shut the panels off is to hide them from the sun. Just assume that things are always live and you should be fine.



2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Attic Rat
Attic Rat
Bergen Co.,N.J. USA
Posts: 524
Joined: December 2003
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 5
Admin 5
Popular Topics(Views)
244,891 Are you busy
182,003 Re: Forum
172,033 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.014s Queries: 15 (0.004s) Memory: 0.9423 MB (Peak: 1.0584 MB) Zlib enabled. Server Time: 2018-03-24 11:52:53 UTC