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Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
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 Posted: Wed Dec 23, 2009 4:44 am Post subject: 30A slo-blo fuse |
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The wiring diagram for the Europa Rotax installation shows 2 off 30A
slo-blo fuses, in the battery & alternator lines to the main busbar.
What hardware have UK builders used to realise these fuses? And where
did you get it?
All the fuses I've found readily available are automotive blade fuses
which all seem to be fast-blow.
There are also industrial cartridge fuses (10mm x 38mm) which will
fit the inline fuseholders available from Halfords (Autoleads AGU
part # G2-30-H) but neither these nor the ones supllied in the
Autoleads holders indicate the speed of blowing.
ANL type current limiters sound nice but (a) are difficult to get in
UK and (b) the minimum size is 35A. Pete Smoothy at Airworld says he
can get 40A ones from B&C. But a 40A ANL is maybe too loose to
protect 10AWG wires?
And how important is it anyway to fit slow-blow as opposed to
fast-blow in these positions?
Opinions, part numbers, suppliers details, all welcome!
regards
Rowland
--
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steven.pitt2(at)ntlworld.
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| Posted: Wed Dec 23, 2009 8:48 am Post subject: 30A slo-blo fuse |
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Rowland
I used 2 x 30amp Potter and Brumfield circuit breakers which have worked
without a problem.
I am about to move them as per Ian Rickards installation as they do not need
to be in the panel, which means disconnecting them every time you want to
remove the panel.
Ask Ian for a photo of his very neat installation.
Regards
Steve Pitt
G-SMDH
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davidjoyce(at)doctors.org
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| Posted: Wed Dec 23, 2009 11:20 am Post subject: 30A slo-blo fuse |
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Rowland, Having researched the question at the time and taken a fair bit of
advice, I also used 30 amp switched circuit breakers, (from RD Aviation, but
can't tell you the make without going back to the plane), which act as my
main & alternator switches, and have given faultless service for 7 yrs.,
although I haven't put them to the test of having something downstream short
out!
Regards, David Joyce, G-XSDJ
---
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topglock(at)cox.net
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| Posted: Wed Dec 23, 2009 11:54 am Post subject: 30A slo-blo fuse |
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Rowland,
I used standard large blade automotive fuses in my installation, with no
ill effects. Auto store has them with the fuse holder and #10 wire
attached.
Jeff - Baby Blue
Rowland Carson wrote:
| Quote: |
The wiring diagram for the Europa Rotax installation shows 2 off 30A
slo-blo fuses, in the battery & alternator lines to the main busbar.
What hardware have UK builders used to realise these fuses? And where
did you get it?
All the fuses I've found readily available are automotive blade fuses
which all seem to be fast-blow.
There are also industrial cartridge fuses (10mm x 38mm) which will fit
the inline fuseholders available from Halfords (Autoleads AGU part #
G2-30-H) but neither these nor the ones supllied in the Autoleads
holders indicate the speed of blowing.
ANL type current limiters sound nice but (a) are difficult to get in UK
and (b) the minimum size is 35A. Pete Smoothy at Airworld says he can
get 40A ones from B&C. But a 40A ANL is maybe too loose to protect 10AWG
wires?
And how important is it anyway to fit slow-blow as opposed to fast-blow
in these positions?
Opinions, part numbers, suppliers details, all welcome!
regards
Rowland
------------------------------------------------------------------------
Checked by AVG - www.avg.com
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paul.the.aviator(at)gmail
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| Posted: Wed Dec 23, 2009 2:04 pm Post subject: 30A slo-blo fuse |
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Hi Rowland,
I used some industrial ceramic fuses and have them in the engine compartment. Given what they need to protect I would consider using a fusible link.
Cheers, Paul
[quote][b]
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hurstkr(at)redzone.com.au
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| Posted: Wed Dec 23, 2009 8:21 pm Post subject: 30A slo-blo fuse |
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Another quite elegant solution is strip fuses available from Vehicle Wiring Products (UK)
See attached, the black things above the Master Solenoid.
Kingsley
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h&jeuropa
Joined: 07 Nov 2006
Posts: 649
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| Posted: Mon Dec 28, 2009 5:33 am Post subject: Re: 30A slo-blo fuse |
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Rowland,
Buss makes a blade fuse series called Maxi which are slow blow fuses.
As an example, a 30A Maxi when subjected to 100A blows in about 2 sec. A 30A ATC fuse (the common automotive fuse) when subjected to 100A blows in about .6 sec.
We used a 30A Maxi for our Rotax alternator output.
We used simple fuselinks as described in Aeroelectric (just short pieces of 24 AWG wire) to protect wire runs for indicator lights instead of 1A fuses.
If you can't locate Maxi fuses in UK, we can send them to you. They are cheap!
Jim & Heather
N241BW
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