Aluminum Fuel Tank Grounding

Kevin,

I am told a copper ground wire should never be connected to a aluminum gas tank. Is that correct. I ask because my new tank has a ground tab welded on it.

Thanks.RDS aluminum fuel tank

Captain Ron

Hi Captain Ron,

Copper wire – either tinned or not tinned – is the marine standard for boat wiring.

When grounding a metal fuel tank, the main requirement is to keep the resistance between the fuel tank and the boat’s ground to one ohm or less.

Here is ABYC standard H-24 says:

“24.16.1

Each metallic fuel tank and metal or metallic plated component of the fuel fill system, which is in contact with the fuel, shall be grounded so that its resistance to the boat’s ground is less than one ohm.”

Hope this helps,

Kevin