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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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 Posted: Mon Dec 07, 2009 7:52 pm Post subject: electric fuel pump current |
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I've been following Van's electrical kit instructions: they call for a 5 Amp breaker for the fuel pump (the one sold by Van's). But today I noticed the pump instructions say it draws 5 amps; they call for a 7 or 10 amp breaker. Has anyone run this pump on a 5 amp breaker without false trips?
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Bob Turner
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Mon Dec 07, 2009 9:06 pm Post subject: electric fuel pump current |
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Your judgement is correct.... use at least a 7.5amp breaker.
Don McDonald
--- On Mon, 12/7/09, Bob Turner <bobturner(at)alum.rpi.edu> wrote:
[quote][b]
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Don A. McDonald
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jesse(at)saintaviation.co
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| Posted: Tue Dec 08, 2009 4:32 am Post subject: electric fuel pump current |
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As was already mentioned in a reply, it needs at least a 7.5A breaker. If you use the right size wire, I would go with a 10A. Van's wiring guide is designed for a carbureted engine, not a fuel injected one. I don't understand why. How many on the list are going carbureted? I think this is one of the only places where it matters, but it does matter. The boost pump for a carbureted engine only puts out less than 10 PSI, so it doesn't draw as much current. I don't understand why they didn't just size the wire enough for a 10A breaker and put that in the kit. A 10A breaker is fine for a low-pressure pump, but not vice versa for the 5A.
Anyway, that's the reason it's in the kit. I found out the hard way about 5 years ago.
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
On Dec 7, 2009, at 10:52 PM, Bob Turner wrote:
| Quote: |
I've been following Van's electrical kit instructions: they call for a 5 Amp breaker for the fuel pump (the one sold by Van's). But today I noticed the pump instructions say it draws 5 amps; they call for a 7 or 10 amp breaker. Has anyone run this pump on a 5 amp breaker without false trips?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 76665#276665
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