Wiring Needed To Attach a Charge Line On The Motorhome When Flat Towing a Vehicle

Published 11/01/2022

Products Featured in This Question

10 Gauge Wire - Blue Primary - Per Foot

(104)

$1.89

Wire Loom - 1/4" Diameter - 1' Long

(293)

$0.60

Deka Ring Terminal - 12-10 Gauge - 3/8" Ring ID - Nylon Insulation - Yellow - Qty 1

(69)

$1.54

Deka Ring Terminal - 12-10 Gauge - Size 10 - Nylon Insulation - Yellow - Qty 1

(69)

$2.94

Circuit Breaker - 20 Amp - Perpendicular Mount Bracket - Cycling Auto Reset - Plastic - Type I

(13)

$6.53

Roadmaster Battery Charge Line Kit for Motorhomes

(140)

$67.45

Question:

We have a 37 foot coachman mirada , i need to run a line from coach battery to the towed car battery, hardware already hooked up to battery. I have to run my coach lights to keep the battery charged and i do nnot want this, what size wire do i need, it will take a little over 50 feet to do the job.

asked by: Hugh T

Expert Reply:

Since you are running 50' of wiring you will want to use 10 Gauge Wire # 10-1-1 which we sell by the foot. Roadmaster has their Battery Charge Line Kit for Motorhomes # RM-156-75 which only comes with 30' of 12 gauge wire. You can build a similar kit with the wiring, Circuit Breaker # PK54220PL, two 10 gauge Deka Ring Terminals # DW05762-1 to connect to the circuit breaker, a 3/8" Ring Terminal # DW05741-1 for connecting to the battery and some Wire Loom # 7509-1 to protect the wire under your motorhome.

expert reply by: Bud M