Re: What exactly is bus wire?

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From: Duane P Mantick (wb9omc@ecn.purdue.edu)
Date: Wed May 04 1994 - 13:06:52 EDT


>
> > What is 'bus wire'? Is there something special about bus wire?
> > Is it just #22 or #28 wire? Insulated? Stranded? Solid?
> > Do I know bus wire, but just by a different name??? Arrgghh.
> > What is it?
>
> I *think* it's just bare wire which is sturdy enough to suspend in mid-air
> to make a power-supply "bus" from. I have some tinned #18 wire that I bought
> as bus wire; it actually seems stiffer than other #18 wires I've seen.
> If your "ferrite beads on bus wire" is just for power-supply filtering, the
> wire is probably uncritical; if it's actually acting as an inductor in a
> tuned circuit, then it would probably pay to use a good stiff wire for
> stability.
>

        To answer his questions....

Typically, bus wire is a solid wire, often supplied as pre-tinned for
ease of soldering. It is almost always supplied with NO insulation
on it. Size wise, it can be anything from real little up to real
thick.

For short runs, it is just as easy to make your own rather than buying
it - just take a piece of solid copper wire of the size desired,
strip the insulation off of it, and tin the snot out of it with
Mr. hot iron and some solder. Make sure the copper is CLEAN first,
e.g., not covered with oxidation. Makes your life a lot easier. :-)

Another thing to take note of - you will typically be using this to
tie multiple common connections. Hence, you're using it in an area
where you don't have to worry about things shorting. If you ARE in
an area where such concerns are evident, DON'T USE IT! Rather, stick
to a point-to-point insulated wire.

I have seen people blow up more good projects by the innappropriate
use of a bare wire bus than most other reasons......

Duane
wb9omc


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