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11-17-2009, 09:15 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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inline fuses?
For the Dynon ammeter shunt, they recommend putting 1 amp fuses on both connections to the D-180. One option they give is to use 1 to 2 inches of 26AWG wire. I think it would be better to use proper fuses though.
I don't want to install another fuse block just for these two fuses... any recommendations for a type of fuse that i can easily splice in-line with each wire?
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-17-2009, 09:26 AM
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Join Date: Jan 2005
Location: Shorewood, WI (Milwaukee area)
Posts: 1,066
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Inline fuses
B&C sells them. They come with a heavy wire (in a continuous circle) and fuse receptacle. Used these for seat heat and rear seat vest power supply. Secondary use of power outlet for charging batt.
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Bill Dicus
Shorewood (Milwaukee) Wisconsin
RV-8 N9669D Flying 12/4/14!
Flying Pitts S-2A, Piper Lance
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11-17-2009, 09:31 AM
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Join Date: Mar 2007
Location: Woodinville, WA
Posts: 533
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Rob Kochman
RV-10, Flying as of March 2011 ( blog)
Paine Field (KPAE)
EAA Chapter 1440
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11-17-2009, 09:51 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Fusible link is what I used right next to the shunt....
Last edited by Brantel : 11-17-2009 at 01:15 PM.
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11-17-2009, 01:09 PM
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Join Date: Jan 2008
Location: KTCY
Posts: 643
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Quote:
Originally Posted by Brantel
Fusable link is what I used right next to the shunt....
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That's what we did ... Made for a nice clean installation...
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Dave & Trina
RV-9A Flying  - 330 Hrs. Painted Finishing the interior.
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11-18-2009, 08:48 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Is there any reason why I shouldn't use the cylindrical glass fuses for this? I found some inline fuse holders for these at NAPA, and they are nice and small. I would put them inline back behind the firewall, to avoid excessive vibration and heat.
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-18-2009, 08:56 AM
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Join Date: Feb 2005
Location: Northwestern USA
Posts: 1,209
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Quote:
Originally Posted by prkaye
Is there any reason why I shouldn't use the cylindrical glass fuses for this? I found some inline fuse holders for these at NAPA, and they are nice and small. I would put them inline back behind the firewall, to avoid excessive vibration and heat.
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I like fusible links for this application because no part of the current path is left unprotected. With inline fuses, you have some length of wire between the shunt and the fuse that has no short-circuit protection.
mcb
__________________
Matt Burch
RV-7 (last 90%)
http://www.rv7blog.com
VAF #836
Any opinions expressed in this message are my own and not those of my employer.
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11-18-2009, 09:00 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Quote:
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With inline fuses, you have some length of wire between the shunt and the fuse that has no short-circuit protection.
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But the current along a wire (and through the fuse, wherever it is) would be the same at any given time, being a path of negligable resistance. So, wherever you put the fuse, if the current in the wire gets too high, the fuse will blow before the wire will burn. Am I missing somethign?
To reiterate my question about the glass fuses... is there any reason why these are a no-no in aircraft?
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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11-18-2009, 09:06 AM
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Join Date: Feb 2005
Location: Northwestern USA
Posts: 1,209
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Quote:
Originally Posted by prkaye
But the current along a wire (and through the fuse, wherever it is) would be the same at any given time, being a path of negligable resistance. So, wherever you put the fuse, if the current in the wire gets too high, the fuse will blow before the wire will burn. Am I missing somethign?
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Think about what happens if the wire between the shunt and the fuse chafes on something and shorts to ground.
mcb
__________________
Matt Burch
RV-7 (last 90%)
http://www.rv7blog.com
VAF #836
Any opinions expressed in this message are my own and not those of my employer.
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