How to Wire a Battery Charger for My RV Battery

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DC switches are available in a variety of sizes, styles and capacity, for marine and vehicle purposes. Intermediate switches are available on grades of 30, 40 and 50 amps. High power circuit breakers are rated between 50 amps and 150 amps. Switches can not be independent, and they must be mounted inside a switch box. Multi-switch boxes are known as the first user-available component of a domestic 120-volt service and single-circuit breaker boxes manufactured for 12 volts use have similar look and function.

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Consult the manufacturer literature over the 12 volt trainer system in your RV, and determine what the maximum voltage switcher should be able to wear. Buy the breaker dimension recommended by the seller.

Remove the ground wire from the negative terminal of the trainer battery.

Turn off the power to the wire in which the switch should be inserted by connecting live or hot - usually the color-coded red cable from the positive battery terminal.

Determine a location along the line of wire between the battery and the 12 volt group center where the switch will be installed. The site should be easily accessible, but do not expose the switch to spill damp or accidental touch.

Use the cutter to cut the thread where the switch is to be installed.

Use Abrasion bars to remove half a inch of insulation from each root end of cut wire. Turn stocks of thread at each end to create two solid, rope-like braids.

Remove the dead-front panel power switch box to expose the two connections. If the switch is in, remove it from the power box according to the manufacturer's instructions.

Insert the power box wire that will supply power to RV from the positive pole on the battery. It may be necessary to remove a knock-out to pass the thread through; If so, use a rubber gasket to protect the cable.

Attach the peeled and braided end of the cable from the battery into the power box terminal marked for this purpose, usually the terminal to the left of the switch housing itself. Release the braid all the way in the circular receiver on top of the terminal, and use a screwdriver to tighten the screw so that the cable can not be moved.

Insert the power box wire that will supply power to 12-volt fuse on board. It may be necessary to remove a knock-out to pass the thread through. If so, use a rubber gasket to protect the cable.

Attach the shielded and braided end of the cable to the fuse card in the power box terminal marked for this purpose, usually the terminal to the right of the switch housing itself. Release the braid all the way in the circular receiver on top of the terminal, and use a screwdriver to tighten the screw so that the cable can not be moved.

Install the power switch in the power box according to the manufacturer's instructions. Make sure the switch is in the "off" position. Replace the dead-front panel power switch box.

Replace live wire on to the positive pole of the coach battery. Replace the ground wire to the negative connection of the trainer battery.



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