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tomherrick Guest
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Posted: Wed May 13, 2020 2:47 pm Post subject: Grounding plastic fuel tank??? |
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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
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Wed May 13, 2020 5:28 pm Post subject: Re: Grounding plastic fuel tank??? |
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The plastic one doesn't need to be grounded.
Build a jumper between sender & filler neck & be done with it. & run a gnd wire from sender to any ground buss or neg bat. terminal.
Real fuel fill hose has a ground wire built in it. |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Wed May 13, 2020 5:56 pm Post subject: |
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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, |
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breausaw
Joined: 18 Jan 2006 Posts: 1222 City/Region: Anchorage
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: Triple J
Photos: Triple J
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Posted: Wed May 13, 2020 7:07 pm Post subject: |
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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. _________________ Jay
2007 22ft C-Dory Triple J 2007-2012
2007 25ft C-Dory Triple J 2012-2018
Boatless for now but looking |
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thataway
Joined: 02 Nov 2003 Posts: 20829 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Wed May 13, 2020 7:40 pm Post subject: |
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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. _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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Marco Flamingo
Joined: 09 Jul 2015 Posts: 1155 City/Region: Seattle
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 16 Cruiser
Vessel Name: Limpet
Photos: Limpet
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Posted: Thu May 14, 2020 11:39 am Post subject: |
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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? |
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thataway
Joined: 02 Nov 2003 Posts: 20829 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Thu May 14, 2020 12:16 pm Post subject: |
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Quote: | We must be dealing with an ungrounded tank there. What precautions are required? |
The hose from the pump is grounded. (not to the negative of the boat,) but if you complete a when putting the pump nozzle on the metal of the grounded fuel fill, you complete the ground to the boat. |
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tomherrick Guest
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Posted: Thu May 14, 2020 1:15 pm Post subject: |
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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. |
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