Wiring, an stuff

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CharlesDavis
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Wiring, an stuff

Unread post by CharlesDavis » Fri Jun 30, 2017 4:58 pm

Hi all

I need to run 5 wires from the front of the I.P. to the elevator trim servo .... I have been thinking of using a PVC Pneumatic hose as a conduit. It is 8mm I.D. and about 10mm O.D. I will be able to secure it to the fiberglass sides etc along its length, and although it is not fireproof, neither is fiberglass .... is this ok, or is there a better material ?

Another thing ... is it acceptable to use, say, 0,5mm^2 stranded copper, pvc insulated wire .... the current drawn is very low, and there will be a suitable fuse on the 2 power lines, the other 3 are signal returns from the servo, so won't need fuses

Cheers
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Chalkie
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Re: Wiring, an stuff

Unread post by Chalkie » Fri Jun 30, 2017 7:59 pm

Use whatever conduit is suitable, they all burn; eventually. But for the wire, use the 5 core wire supplied by the manufacturer or use 1 of 3 core shielded 20 gge or 22 gge wire for the data. Use 20 gge twisted pair shielded for the power.

After spending all that money on an aircraft that you built, why would you want to compromise safety to save a few RRR's?
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Re: Wiring, an stuff

Unread post by CharlesDavis » Fri Jun 30, 2017 8:46 pm

Thanks Chalkie, I am not into compromise at all .... the manufacturer you refer to, is that "Jaycor" ? or ??
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Re: Wiring, an stuff

Unread post by Chalkie » Sat Jul 01, 2017 8:54 am

My apologies, I assumed Ray Allen/MAC servos as they are the most common. The 2 core and 3 core shielded wire should be available from a local avionics shop/AMO.
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Re: Wiring, an stuff

Unread post by Ugly Duckling » Sat Jul 01, 2017 9:04 am

PVC insulation gives off Chlorine fumes if burned, not the stuff that you want in a confined space like a cockpit. Use the proper Tefzel wire from day one.
Paul Sabatier EAA Ch 575, SSSA, ERGC, ERFC, AeroClub
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Re: Wiring, an stuff

Unread post by CharlesDavis » Sat Jul 01, 2017 11:19 am

Ok, gotcha. It is a Ray Allan servo, but the wire supplied is only about 6" long ..... Looks like Tefzel wire in the pneumatic conduit will do the job. Now to just find some tefzel ....
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Re: Wiring, an stuff

Unread post by Ugly Duckling » Sat Jul 01, 2017 11:30 am

Paul Sabatier EAA Ch 575, SSSA, ERGC, ERFC, AeroClub
Long time Cygnet builder
The object is to fly, it does not matter what the object is!

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