REFLECTOR:Wiring

[Greg Poole]

Always enjoy your input Wayne - please keep the supply rolling when you see
opportunity.

Kind regards,

Greg in Sydney.
STD RG E

----- Original Message ----- 
From: "Wayne Lanza" <wlanza@bellsouth.net>
To: <reflector@tvbf.org>
Sent: Friday, October 24, 2003 10:17 AM
Subject: REFLECTOR:Wiring


> Regarding the type of wire to use...
>
>   You can basically use any type of wire you want. The Tezel (MS22759)
> is great stuff
> to work with, it strips well, has great abrasion resistance and has
> fine, plated strands.
> The recent discussions regarding vapor hazards when wires overheat
> misses the point.
>
>   A properly designed and protected system is less likely to have this
> problem... For the
> sake of argument you can easily induce this problem by improper
> grounding. How?
> By not matching the capacity of the ground return to the total of all
> the loads connected
> to it - have seen it done, especially behind the panel. In other words,
> you can use all of
> the breakers you want and the best wire in the world and still make the
> grounds glow
> if they are overloaded.
>
>   Another reason for using wire like 22759 is the wire itself. The
> strands are tin plated
> and if properly terminated (with the proper terminals) will not corrode
> or oxidize. The
> next and most important consideration is the stranding itself. This
> type of wire employs
> many fine strands, and in the larger wire strands of strands that are
> designed to flex
> and give with stress and vibration. The fine strands also crimp
> better... As I understand
> it, the actual copper base metal of this wire is also less likely to
> work harden and break
> like coarse wire, i.e. house and automotive wire.
>
>   I can't tell you how much wire we use to typically wire a Velocity, it
> varies a lot. But I can
> tell you that we have seen many aircraft with wiring problems and 90%
> of them are due
> to the wrong stuff being used in the airplane. You get what you pay
> for...
>
>   My comments are not opinions but product of practical experience from
> my efforts at
> Velocity and 25 years as an electronic test engineer. I am a contractor
> at the builder's
> center and have designed & manufactured electrical systems for
> experimental aircraft
> for the past ten years. We have tried hard for many years to address
> the typical problem
> areas associated with the electrical systems in composite aircraft. I
> hope that you find
> this information useful and that I have been of some help.
>
> Best Regards to all,
> Wayne Lanza
> Composite Design, Inc.
>
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