Wire size for DC breaker

OutBack's newest innovation in balance-of-system components

Moderators: OutBack, OutBack Moderator Team

Wire size for DC breaker

Postby webpaul on Thu Sep 22, 2011 12:50 pm

I have some Outback 60 amp DC breakers and I want to connect them to my Flexmax 60, which the manual recommends AWG 4 wires. The hole to the 60 amp DC breaker is quite small though, maybe AWG 8 - do I just trim off some of the copper to get it in there or am I missing something?
webpaul
Member
 
Posts: 10
Joined: Wed Sep 21, 2011 12:17 pm
My RE system: Flexmax 60, 2 250W panels, 5 12V 100AH batteries in parallel, Xantrex prowatt 2000 inverter

Re: Wire size for DC breaker

Postby SteveHiggins on Sun Sep 25, 2011 11:01 am

Is this a panel mount breaker or a din mount breaker?
Steve Higgins
Technical Services Director- Surrette Battery Company

\
SteveHiggins
OutBack Czar
 
Posts: 567
Joined: Thu Mar 03, 2005 3:43 pm
Location: Seattle

Re: Wire size for DC breaker

Postby webpaul on Mon Sep 26, 2011 5:02 am

Din mount - I just jammed it in there best I could, most of it fit in. I used 4awg wire which mostly works but I don't think I could use anything bigger than that without doing something different or just trimming down the amount of copper at the end.
webpaul
Member
 
Posts: 10
Joined: Wed Sep 21, 2011 12:17 pm
My RE system: Flexmax 60, 2 250W panels, 5 12V 100AH batteries in parallel, Xantrex prowatt 2000 inverter

Re: Wire size for DC breaker

Postby timmartin on Mon Sep 26, 2011 8:45 am

Seems like a poor idea though. Why not get bigger breakers? or check to see if you could have lived with smaller wire?
timmartin
OutBack Guru
 
Posts: 271
Joined: Thu Dec 02, 2010 9:31 am
My RE system: ...
Sharp 120W Panels (12)
SunPerfect 230W Panels (9)
Whisper 100 Wind Turbine
Outback FM60 charge controller
Outback FM80 charge controller
Outback VFX3648 inverter/chargers (2)
Outback FlexNet DC
CALB CA400 LiFePO4 3.2V batteries
(32 in 2 strings = 800Ah)

Re: Wire size for DC breaker

Postby Kent Osterberg on Wed Sep 28, 2011 7:13 pm

The Outback DIN rail breakers are rated for wire sizes from 14 to 2 AWG. 4 AWG should fit easily. If you have large wire, splice a short (6" to 12") piece of 4 AWG to the end of it before connecting to the breaker.
Kent Osterberg
OutBack Emperor
 
Posts: 1494
Joined: Mon Jun 09, 2003 11:01 pm
Location: Cove, Oregon
My RE system: SMA Sunny Boy 2500 with eight Mobil Solar Ra 180 modules


Return to FLEXware

Who is online

Users browsing this forum: No registered users and 1 guest