Hi! Tony.
So a "negative" bus bar, with about a dozen connections, should be thrown
and replaced with a single point connection for all the "circuit" return
wires ,as well as a single point connection for the "grounding " wires?
(Just convince me please that circuit negative wires are the same or
different to "ground" wires?)
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: forum-owner@europaclub.org.uk
Subject: Re: Bundling of coax cables
> so ensure that the "negative" part of all the power supply circuits are
> completely separated from the "grounding" circuit with their own
> circuit systems.
This separation of the ground line from the power line is not necessary
within
the cabling structure other than to say that it would reduce the possibility
of
shorts if the cables were chafed and a power line happened to contact a
ground
line.
What is important is to ensure that each device has its own independent
ground
return line and that all of those grounds are terminated at as few points as
possible....preferably one. Failure to do this can result in an
electrically 'noisy' environment which can affect audio systems.
In reality the removable nature of the Europa instrument panel may mean that
you have a few ground distribution blocks. In this case the ground blocks
should be linked by a large gauge wire.
In my aircraft all fuselage located devices are terminated on a single
ground
block located on the firewall to which is connected the 4AWG wire to the
battery. A 10AWG wire from that block connects to another distribution block
located in the instrument panel that has all of the panel grounds connected
to
it.
Bob Nuckolls (www.aeroelectric.com) makes a rather good Faston ground block.
It
has a bolt to penetrate the firewall which allows you to terminate the
battery
ground wire from an aft mounted battery. It gives you ground blocks on the
fore
and aft faces of the firewall and allows you to conveniently terminate all
your
grounds without using a single screw terminal. You can make the same sort of
thing up yourself if you have a hefty soldering iron.
Regards
Tony
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