Excess wire best practice?

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Tiger Tim

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Apr 26, 2013
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So I’m going to be wiring up P-leads to some mags soon and the wires and switch are all one unit, sealed together, nearly a hundred years old and practically irreplaceable. Also new old stock so effectively brand new. Anyways, I figure I have three more feet of wire than I’ll need so I’m thinking I’ll shorten it but not to the bare minimum, if that makes sense. You know, leave myself some excess for future repairs or if the inspector doesn’t like my routing or something.

I was thinking of securing a coil of excess wire somewhere behind the firewall and in front of the front instrument panel. Are there any best practices to follow if I do go ahead with this?
 

Dana

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Definitely wise to leave some excess, how much is up to you. But keep it away from any antenna wiring.

What's so special about the switch that the wires can't be replaced?
 

WonderousMountain

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Apr 10, 2010
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Clatsop, Or
Yes, you need to secure the coil from abrasive contact & vibration.

Keep a good distance from connections,
or you will induce movement in junction.
There should be a minimum radius amount.

Good luck,
CK LuPii
 

cvairwerks

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May 12, 2010
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North Texas
Our company standard is to leave enough for three terminal replacements on each end when the wire is routed per blueprint. If there is a connector at the end, there has to be enough slack left to remove or install it, after the third terminal replacement. It’s sorta vague, but covers every installation on the airplane without bogging down in location based measurements.
 
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