This has caused me a lot of grief. I am not sure who did this as we
 had several people employed at the time it was done. At least 4
 crimp connection came undone as the wrong tool was used to crimp the
 terminals.

 A real rats nest.

 No advanced planning, schematic  or 3D drawings. (If you are
 building an airplane a 3D drawing program is a HUGE HELP!!!)

 Make sure you space things far enough apart so a socket wrench can
 be used to tighten or loose the nuts holding the CB's and switches.

 I am still trying to clean it up.


 Switches and circuit breakers come with either Phillips or straight
 slot screws.

 Absolutely and with out a doubt the worst possible solution. You
 need three hands with tiny fingers to assemble the wiring to the
 switch or CB. One hand to hold the wires and another to insert and
 hold the screw in place and a third to use the screw driver to
 tighten the screw.

 Either Allen screws or small stand offs work 10 to 100 times better.
 The  hex driver or the Allen wrench can do the last two jobs If you
 tape the allen or hex screw to the end of the driver.

 The schematic is still a work in progress.

 Paul Lamar

 Hey Paul, If you need some real screws, we have lots of Philips head
 stuff up hear in Canada! Yes 3D, EAA has free Solidworks with
 membership!

 Steve Carlisle

 You are joking of course. I hate them. Nothing but trouble my entire
 life.

 Paul Lamar

 Steve, you must be referring to Robertson. Americans don't like them
 because invented by a Canuk. Paul, use Vaseline. Dip the Phillips
 screw driver in a jar to get a bit on the end. Works to hold bolts
 or nuts in sockets also.

 Dale Davies

 Vaseline is not strong enough. Allen head or better yet 6-32 stand
 off's.

 Paul Lamar

Paul,

True Phillips or slotted screws are fine, but you need to assemble into
a harness terminating in a multipin connector, and remove/replace as one
unit rather than trying to wrestle individual breakers and wires in the
cockpit. The good cheap lightweight connectors these days are AMP CPC
types, some up to 35 amps continuous.

David Josephson

They are not fine when you are upside down working in a confined space.
Have you ever wired or tried to wire an instrument panel installed in an
aircraft?

Unless you want to rip it all out and start over AMP CPC types are
irrelevant.
The Motec and the M&W do not use AMP CPC types.

Each aviation electric or electronic device device has its own set or
type of connectors.
There is no standardization.

You have to work with them. If they use Phillips or slotted screws it is
easy to
change to hex or stand offs. These are much easier to use than Phillips
or slotted screws.

Paul Lamar


Please take note that zinc plated steel standoffs must not be used as
high current
conductors, they are only listed as grounding components.
Craig Smith

What is the current limit? What happens to them?


Paul Lamar


There is no "current limit" they are not rated as conductors, electrical code.

Craig Smith


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