Grounding plastic fuel tank???

tomherrick · Guest

I purchased two Moeller 24 gal. side tanks for my project; they come set up one for port and one for stbd. What confuses me is that one fill is plastic molded with the tank and the other has a metal fill tube with a warning message that it must be grounded. I'm a tad confused on this one.

From ABYC E-11:

24.16 FUEL SYSTEM GROUNDING

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.

NOTES: 1. The body of the deck fill is considered to be in contact with the fuel.2. For the grounding of liquid level transmitters see ABYC E-11, AC and DC Electrical Systems on Boats.

24.16.1.1Metallic components not in contact with fuel (e.g., retaining chain and/or cap) on non-metallic deck fill assemblies shall not be grounded.

24.16.1.2 Grounding wires shall not be clamped between the fill pipes and the flexible hose (see ABYC E-11, AC and DC Electrical Systems on Boats).

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tsturm

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The plastic one doesn't need to be grounded.
Build a jumper between sender & filler neck & be done with it. Thumbs Up

& run a gnd wire from sender to any ground buss or neg bat. terminal. Mr. Green

Real fuel fill hose has a ground wire built in it.

tsturm · Posted: Wed May 13, 2020 5:56 pm Post subject:

Un wind some of the wire in the fill hose & bend it over inside, slide the fill into the hose & clamp. on the other end at the tank with the plastic fill neck bend the wire to the outside & attach your jumper to it. On the metal fill neck do like fill end, Thumbs Up

breausaw · Posted: Wed May 13, 2020 7:07 pm Post subject:

Heed the part that reads: Seek professional help if you our unsure of procedure!

You might reach out to a marine mechanic you trust for clarification.

Would also think the tank manufacture would have some advice.

thataway · Posted: Wed May 13, 2020 7:40 pm Post subject:

I notice that both of the tanks have fuel gauges. Both tanks should have the fuel gauge grounded--both to boat's negative ground, and to the the fuel fill metal rim, with a jumper. On the case of the metal fill, I would run the jumper to the fill fill also.

Marco Flamingo · Posted: Thu May 14, 2020 11:39 am Post subject:

This may have been discussed before and I just don't remember. I know that I grounded my built-in fuel tank in the CD 16, and I just found out that one of my stainless fuel tanks in my new boat isn't grounded and I'm working on fixing that. But it did make me wonder about the ground on my C Dory. Yes, it is grounded when in the water, but many of us fill up at a service station when possible. We must be dealing with an ungrounded tank there. What precautions are required?

thataway · Posted: Thu May 14, 2020 12:16 pm Post subject:

tomherrick · Guest

What really has me curious is why Moeller would make these tanks differently, other than one is beveled for port and one for starboard installation. Wondering why one has a metal fill and one has a plastic fill.