Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 05-18-2017, 01:52 AM   #1
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 660
THOR #4488
House Battery Cables

I am replacing my 2 Harris Batteries in my Miramar with 4 new Duracell batteries. I know how to wire them (series/parallel) but I question what size cable to use. I am leaning toward 6" - 2/0 connector cables to wire the 2 together in series and then the same size in 12" length to connect the pair in parallel. From what I understand this may be bigger wire than necessary but bigger is better, right...and it won't hurt anything. Any thoughts would be appreciated. Thanks.
__________________

__________________
Miramar Owner is offline   Reply With Quote
Old 05-18-2017, 02:38 AM   #2
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 1,460
THOR #6411
The only heavy draw from the batteries is the inverter. Since you have a 1,800 watt inverter, the max draw would surge of 3,600 watts divided by 11.0 volts would be 328 amps. That puts you at 3/0 wire. More conservative would be 1,800 watts divided by 11.0 volts or 163 amps which puts you at 2 ga. So all the wiring should be 2 ga. That assumes 12 volt batteries. If you choose to use 6 volt batteries, the the connections between the batteries need to be double the 12 volt size.
__________________

__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 05-18-2017, 02:34 PM   #3
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 660
THOR #4488
Quote:
Originally Posted by Beau388 View Post
The only heavy draw from the batteries is the inverter. Since you have a 1,800 watt inverter, the max draw would surge of 3,600 watts divided by 11.0 volts would be 328 amps. That puts you at 3/0 wire. More conservative would be 1,800 watts divided by 11.0 volts or 163 amps which puts you at 2 ga. So all the wiring should be 2 ga. That assumes 12 volt batteries. If you choose to use 6 volt batteries, the the connections between the batteries need to be double the 12 volt size.
Just an FYI...I have a 2000 watt inverter so that may change your calculations some what. They are 6 volt batteries. Also, in researching wire there is a big difference in AWG 2 and 2/0. The 2/0 is much larger or am I just confused.
__________________
Miramar Owner is offline   Reply With Quote
Old 05-21-2017, 01:28 AM   #4
gmc
Senior Member
 
gmc's Avatar
 
Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
Posts: 1,763
THOR #2829
Quote:
Originally Posted by Miramar Owner View Post
Just an FYI...I have a 2000 watt inverter so that may change your calculations some what. They are 6 volt batteries. Also, in researching wire there is a big difference in AWG 2 and 2/0. The 2/0 is much larger or am I just confused.
The n/0 notation is for wires larger than AWG 1...
0 (or aught)
00 or 2/0
000 or 3/0
0000 or 4/0...
So yes - 2/0 wire is 3 sizes larger than AWG 2.
The diameter of 2-gauge wire is 0.2576 inch. The diameter of 2/0-wire is 0.3648 inch.
__________________
Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
gmc is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 06:12 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×