ground resistance

[channy1324]

ok so I was wondering what the resistance(ohm load) of your ground wire on your amp to your front batt should be. I heard somewere that it should be under 30 ohms I just checked mine and it is 20 ohms I was just curious

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[CrossoverOre 10+ year member]

thats bad. you want to be around .0-.5

 

[shizzzon 10+ year member]

I have never heard of someone measuring resistance like that but it should be 0.0 ohms.

Using only the frame of the vehicle is terrible if using stock electrical on amps at or greater than 1kw.

I would opt for ground run from front to rear but ONLY if you are having problems or potential problems.

 

[keep_hope_alive Premium Member]

you will NEVER measure 0.0 ohms. there is resistance in everything - especially the connections. there is even resistance in the meter leads and between the meter tip and surface.

most meters are horribly inaccurate at low resistance.

to measure low resistances, you use a resistor in-line with the leads. the resistor should be sized to be in the meter's highest accuracy at a 0.01 ohms. some meters won't get that accurate and your best is a tenth.

 

[shizzzon 10+ year member]

But i have measured 0.0 ohms. According to you, it's not accurate, but I HAVE measured it plenty of times.