Direct current battery cables carry electrical current in a circuit. The electricity flows away from the positive terminal and back into the battery through the negative terminal. As electricity moves through the cables, the amperage (or strength of the electrical current) creates heat. The greater the total distance the electrical current travels, the more heat is generated in the cable. Amperage and the total length of the electrical current are used when determining the diameter of the cable used.
- Skill level:
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Things you need
- Crescent wrench
- Wire cutters
- Wire stripper
- Electrical tape
- Wire connector (two terminal connector)
Use wire cutters to cut the battery cable at the point the cable will be extended. Strip (remove any plastic coating or insulating) the battery cable until sufficient metal is exposed to insert into the terminal connector.
Align a two terminal end connector, or wire connector, with the two wires to be connected. Insert the bare wire end of the battery cable connection into one side of the two terminal connector.
Slide the extension cable into the remaining open end of the two terminal connector. Using the provided bolts or clamps, secure the two terminal connector to both the battery cable and the extension cable.
Wrap the extension terminal cable connector with electrical tape until both the battery cable and the extension cable ends -- which were inserted into the two terminal connector -- are covered.
Tips and warnings
- Determine the amperage capacity of the load on the cable and total distance of the cable to determine the gauge required. If the current gauge of the cable is not sufficient, replacement cable will need to be acquired.
- A two terminal connector, or wire connector, allows the union of two separate lengths of cable. Terminal connectors are available in a variety of styles (clamp, bolt, screw); the style selected will determine the actual tools used to connect the wires.
- Use the same gauge wire for both the battery-connected wire and the extension wire to avoid fire hazard or wire failure.
- Use a two terminal connecter designed for wire gauge to be connected.
- Installation of a fuse is recommended to avoid damage to the electrical system during an overload condition.
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