By
FGT
QUESTION: How to wire the C/B into this current dual battery set up.
EXISTING SITUATION: MAIN Battery is OEM and feeds OEM circuits. Added an AUX Battery in the OEM dual battery location. Connected the AUX - terminal to the MAIN - terminal. Connected the 100A Accessory Fuse Block power cable to the AUX + terminal. Installed a smart isolator between AUX and MAIN batteries where a cable from AUX + goes to the isolator and a cable from isolator to MAIN battery + terminal. Installed separate QD battery tender cables to both AUX and MAIN batteries + and -. The dual battery system appears to work as intended. For this Phase 1 improvement, to avoid having to constantly pull the leads on the AUX + battery post off and put on, for testing or maintenance of Accessory circuits, I wanted a more convenient and safer way to open the circuit from the AUX battery + terminal the Accessory Fuse Block. I called an off road dealership and was told to install a much larger capacity circuit breaker than the 100A rated Fuse Block and was recommended to get a 250A C/B like the one in the pic, which I did. I was told the reason for the C/B high amp rating was two-fold (a) to trip in the event of a battery short circuit and (b) to be able to conveniently open the C/B to kill power to the Accessory Fuse Block without removing leads from the AUX + terminal. The 250A C/B has two posts labelled "BAT LOAD" and "BAT LINE". There are currently three connections to the AUX + post: (1) Accessory Fuse Block power cable, (2) cable to Isolator AUX in terminal, (3) cable from AUX battery charger.
By dave pasch
By mac66
By FGT
By sxr951
By Buck
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.