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OHMS in inverter set up #8447408 08/02/25 03:43 PM 08/02/25 03:43 PM
Joined: Dec 2006 MN M Mark K OP trapper
Mark K OP trapper M Joined: Dec 2006 MN	I am installing a 300w pure sine wave inverter in my camper. The wire I bought (because it is the lowest GA that will go into the connectors) is 8GA. It figures out to .006 ohms at 10 feet. Do you think this is an acceptable amount of resistance?

Re: OHMS in inverter set up [Re: Mark K] #8447421 08/02/25 04:18 PM 08/02/25 04:18 PM
Joined: Jun 2018 Beatrice, NE L loosegoose trapper
loosegoose trapper L Joined: Jun 2018 Beatrice, NE	Wiring size for invertors isn't really about resistance, it's about current carrying capacity (amps). A tiny little 18 gauge wire will probably measure out to about the same resistance with an ohmmeter as your 8 gauge wire, but of course wouldn't work because it can't carry the current. That being said, 300w at 12v is 25 amps, and 8 gauge wire will carry that just fine.

Re: OHMS in inverter set up [Re: Mark K] #8447460 08/02/25 05:23 PM 08/02/25 05:23 PM
Joined: May 2015 N.Y. Mid Hudson Valley T Tommyran trapper
Tommyran trapper T Joined: May 2015 N.Y. Mid Hudson Valley	Go here and scroll down a little for a nice chart: https://blazeoffroad.com/blogs/elec...ning-the-correct-wire-size-for-a-circuit

Re: OHMS in inverter set up [Re: Mark K] #8447500 08/02/25 07:29 PM 08/02/25 07:29 PM
Joined: Dec 2006 MN M Mark K OP trapper
Mark K OP trapper M Joined: Dec 2006 MN	Cool. I put the rig together to see how it would go and one of the lugs broke off in the snug position, so I am stuck with the 8ga whether I would have liked it or not. I like it based upon what loosegoose said.Thank you for your support.

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