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07-31-2011, 01:43 PM
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Join Date: Jul 2005
Location: Los Angeles, CA
Posts: 634
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3-conductor shielded OK substitute for 2-conductor shielded?
I'm wiring my avionics stack, and I have run out of 2-conductor shielded 24ga wire.
I have a ton of 3-conductor 24-ga shielded wire, and I was wondering if it's acceptable to use the 3-conductor in place of the 2 conductor I need by using only 2 of the 3 wires and clipping the 3rd one off at the insulation.
thanks,
-John
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RV-7 N313TD
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07-31-2011, 02:02 PM
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Join Date: Sep 2005
Location: Dothan, Alabama
Posts: 1,487
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Perfect. and added words to meet the minimum post.
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Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
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Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
?Mark Twain
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07-31-2011, 02:09 PM
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Join Date: Aug 2007
Location: Wichita Falls, TX
Posts: 2,182
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It will work just fine. Whenever I use 3-conductor shielded when I only really need 2, I sometimes just connect the extra wire to ground.
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Neal Howard
Airplaneless once again...
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07-31-2011, 02:43 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,245
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Yeah guys, of course it will work....but think of all the excess WEIGHT that he'll be adding to the airplane! 
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Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
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A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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07-31-2011, 03:31 PM
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Join Date: Jul 2005
Location: Los Angeles, CA
Posts: 634
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Thanks guys!
As for weight, maybe I can ride my bicycle to work a couple of days a week and save it that way...
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RV-7 N313TD
SOLD 7/2/2020
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07-31-2011, 04:17 PM
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Join Date: Jan 2005
Location: St. Paul, MN.
Posts: 4,792
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Haaaa hhhhhaaaaa. Great answer. You know I was just thinking about this the other day. People get all excited about four nutplates adding extra weight, for example, when, really, it'd be a lot healthier if we just lost a little of our OWN weight to compensate.
Well played, sir.
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07-31-2011, 05:00 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,152
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Ha, I just came in from the shop where I was installing 12 nutplates just because I might (long shot) want them there some day.
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
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07-31-2011, 06:12 PM
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Join Date: Apr 2005
Location: Indepenence, Oregon
Posts: 341
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Quote:
Originally Posted by Neal@F14
It will work just fine. Whenever I use 3-conductor shielded when I only really need 2, I sometimes just connect the extra wire to ground.
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Seems to me that you would want to connect the extra wire to the shield at the end that the shield is grounded and leave the other end free. Ground loops????
Bruce Patton |
07-31-2011, 06:25 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Quote:
Originally Posted by bpattonsoa
Seems to me that you would want to connect the extra wire to the shield at the end that the shield is grounded and leave the other end free. Ground loops????
Bruce Patton
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Yes, since the extra wire is inside the shielding just let it float.
Grounding will have no effect unless you ground at both ends and make a loop - which is usually not good as Bruce says... 
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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07-31-2011, 10:08 PM
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Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,647
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In fact, I'd be sure to heat shrink over the clipped wires so they don't inadvertently contact something.
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Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
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