Battery shut off switch.

[TURBS]

Originally Posted by rsv4pilot

Ill look at it closer but mine definitely has extra wire, it's not, physically, inline at all. Wire from front of trailer half way back to cut off then another wire all the way back to the front of the trailer.

It has to be or should be inline or that defeats the purpose

[TURBS]

I'm definitely curious how they wired it.

[Mike968]

15' of 8-10ga wire is going to have negligible line loss on a 12vdc system, I wouldn't give it a second thought. A single crimp connection, even one done properly, offers more resistance than a 15 foot section of copper wire.

[rsv4pilot]

Kinda what I thought. Thanks mike.

[techntrek]

Not so fast, that depends on what load you are running. If you still have all of your original incandescent lights you'll have a big load. Just 12 of them (6 double fixtures) on at one time is 18 amps, and over 15 feet of 10 gauge wire that's a 5.6% voltage drop - which is too much. Even if you only run 6 bulbs, if you add on a fan and/or water pump you'll be back into high-amp territory.

[jim-bob]

My 06 FR Sierra Sport 5ver did not have a disconnect switch so I placed it right above the battery on the ground wire and solved my dead battery issue.

[techntrek]

Originally Posted by jim-bob

My 06 FR Sierra Sport 5ver did not have a disconnect switch so I placed it right above the battery on the ground wire and solved my dead battery issue.

It is safer to put the disconnect on the positive side, since the frame is negative. Putting the disconnect on the negative side leaves the positive run to the converter, live. Not an issue for phantom loads, just safety.

[Happy Vibe]

How did you come up with 5.6%?
What ohms per foot are you using?
The online calculator came up with .015 ohms for 15 feet.
.015 X 18 = .27V drop
0.27V of 12V is 2.25%

[techntrek]

I've always used this one: Voltage Drop Calculator - for single and 3 phase ac systems and dc systems

You are forgetting to double the resistance since the run is to the load and back. So 30 feet of wire.

[Happy Vibe]

He said there was 15 feet of wire not that the switch was 15 feet from the battery.