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Electrical Wire and Cable

Wiring a Switch to Battery Power Sources

By Dave Rongey - Summary:

How to Wire a Switch to Battery Power Sources: You will need to select and size the switches and relay according to the voltage and amperage, or in this case mili-amps or watts of the circuit load.

Switch Wiring for Battery Power

Electrical Question: I am running batteries to 2 different devices. I want to put them on 1 switch. Is that an issue? I will give you the run down.

Currently, I have the black line (neg) going from the 6 batteries to the switch then to item A. The red line (positive) goes from Item A to the batteries.

Is mixing the two sets of 6 and 2 going to cause me a problem? might it give too much juice to item B? Will that mean essentially 8 x AA will be going to both items? or will the power split correctly? I am really after being able to switch both items on with the same switch. Any ideas?



This electrical wiring question came from: Jeff, a Homeowner from Watford, UK.
See more about Home Wiring in the UK

Additional Comments: Looks like a great website. Very informative I have bookmarked it already

Dave’s Reply:
Thanks for your electrical wiring question Jeff.
Hi Jeff, Thanks very much for bookmarking the website!

How to Wire a Switch to Battery Power Sources

Jeff, consider the following possibilities for Switching Battery Power:

More about Wiring a Switch

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2 Responses to “Wiring a Switch to Battery Power Sources”
  1. Dave Rongey says:

    Thank You for your insight Bruce!


  2. Bruce Ressler says:

    For the question “Wiring a Switch to Battery Power Sources”, the correct answer is “Yes, he can power two items from two battery packs with the scheme he described (single pole switch).” Just don’t connect the two red wires together.