dual battery wire
I have some spare 4ga wire left over after installing my amp and I want to add a second battery & switch. could I get away with using the 4ga wire to connect to the switch or do I need heavier gauge?
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Others will chime in, but I personally wouldnt run anything less than 0 gauge.
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1/0 is what experts recommended to me.
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If you are using that battery to run your engine, 4ga should be fine. If using as part of a battery bank, a larger gauge would be desirable.
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it would be used to connect a battery switch and second battery together. so I should go 1/0 ga?
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Yes, 1/0 will be good if the battery is being used for things other than the motor. Plus, if the batteries are close to each other - you will only need 1-2 feet of 1/0.
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I am running 0awg and my batteries are in the tray next to each other, 1ft of each is certainly enough.
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Just some food for thought. If the the house (stereo) bank will be connected to a dual battery switch and used to start the engine on occasions, keep in mind that a typical V8 engine starter can easily draw 250A.
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I'm using 4awg for switch connections and 2awg for bank grounding connection and starting bank to starter connection with no issues. It all depends on your setups draw. Blue Sea has a sizing chart for awg and fuses.
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