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10-12-2012, 09:53 PM
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Join Date: May 2006
Location: Sammamish, WA
Posts: 652
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Securing wires firewall forward...
I'm using a braided grounding straps from ground post on the firewall to an engine sump bolt. The strap is 20 inches long and is barely touching the fuel pump fittings. Is this a bad idea? Here's a picture. Do I need to secure the strap to something besides the two ends?
Another question. Can I put an adel clamp around a fire sleeved fuel line to secure wires? Here's another picture.
Thanks,
Michael-
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Michael Burbidge
Sammamish, WA
RV-14A Empennage
RV-9A Flying?340 hours!
Last Donation: December 2019
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10-12-2012, 09:57 PM
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Join Date: Jun 2006
Location: San Jose, CA
Posts: 1,125
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That ground strap will act like a saw over time. I wrapped mine in critical locations with Rescue Tape.
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Kelly Johnson
San Jose, CA
RV-9A
Pink slip issued: 5/7/12
First flight: 5/28/12, Memorial Day.
Phase I Complete: 8/18/12!
2020 donation: complete
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10-12-2012, 10:03 PM
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Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,389
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And the Adel clamp will be fine.
Greg
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Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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10-13-2012, 12:03 AM
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Join Date: Dec 2006
Location: Portland, OR
Posts: 827
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Ground strap routing
That ground strap carries all the current related to all engine operation, and especially starter operation. I wouldn't route that strap anywhere near anything fuel related.
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Long-EZ built 1985 -> Sold 2007
RV-9A; N539RV First Flight: 7/2010
RV-8A N468DL 40 hr Flight Test Program
Building Log: www.mykitlog.com/n539rv
APRS Tracking: aprs.fi/n539rv
2017 Paid 
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10-13-2012, 09:08 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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If it were mine, I would take a piece of clear plastic hose, about 3" long, slit it and slide over the ground strap. Then using lacing cord, tie the covered ground strap to the fuel fitting so it can not move.
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Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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10-13-2012, 09:11 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by ArVeeNiner
That ground strap will act like a saw over time. I wrapped mine in critical locations with Rescue Tape.
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While I agree with covering the strap with tape or other form of protection, I think you are going to be protecting the ground strap from being damaged, not from causing damage.
The ground strap is probably tinned copper, pretty soft stuff.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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10-13-2012, 04:51 PM
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Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
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Shorter ground strap?
whiel I know you already have your long ground strap, have you thought about an engine bolt that's higher up and closer to the battery? You could avoid all that potential interference with the mixture cable, fuel lines, etc. Because I have an LSEI on the right, both the mag position and vacuum pad had available bolts, which made the negative strap really short and far removed from all the crowding lower down on the back of the engine. Just a thought ....
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Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
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