MOTM

My understanding is that electrons only actually travel (well, in so much as
electrons actually travel) along the diameter of a wire, not all the way
through it.  (I don't recall why...)  So a thick solid wire concucts much
less than a bunch of small stranded wires.

--PBr

-----Original Message-----
From: ceres@... [mailto:ceres@...]
Sent: Monday, April 09, 2001 5:18 PM
To: motm@yahoogroups.com
Subject: [motm] OT: stranded vs. solid (was: Power One Power Supply
Question)

Quick question, though (especially since Larry is the high voltage 
expert) - what's the deal w/stranded vs. solid wire?  I've been using 
14ga solid copper wire for the main (800mA or 1.5A) DC out, but 
(IIRC) Larry recommends stranded.  What's the reason for this?  (And, 
do I risk screwing things up by using solid?)  (And, for that matter, 
why is stranded used for all audio applications, from microphone 
level to power amp speaker level?)

The primary reason is simply mechanical.  Solid is not very flexible.
Stranded can be quite flexible.  But, for wiring where it is to be put into
place and not moved around, there is nothing wrong with solid.  The "skin
effect" (yes that is what it is called) is only an issue at very high
frequencies.  There is a difference in the ampacity of the same size
stranded and solid wires.  But, that is not an issue for synth power supply
uses.  That only applies to us high voltage guys who rate the loadability of
wire by the conductor temperature, how much it sags between the poles, and
how much the wind is blowing.

So, solid is OK, if it is not to be moved around.  Most house wiring is
solid.  However, I would use some nice stranded stuff.  I pick up lots of
nice utility grade stranded wire scraps from constuction sites at work.
Pieces under 10 feet are virtually usless to us.  However, they are usually
just right for synth work.  I will ba happy to send nice 12 or 14 guage
stranded wire for synth power supply wiring inside their cabinets to anyone
that asks and tells me how much they need.

Larry Hendry

In a message dated 4/9/2001 6:10:04 PM, jlarryh@... writes:

>I will ba happy to send nice 12 or 14 guage
>stranded wire for synth power supply wiring inside their cabinets to anyone
>that asks and tells me how much they need.

I know you've done this for many people in the past (you are such a 
sweetheart). I'm not sure how you are using this wire however, since I'd 
think that the MTA .156 connectors would be too small to fit the wire. Maybe 
you're using this between the PSU and a barrier strip, eh?

JB

This is not for the MTA connectors.  This is to go from power supply to the
MTA equipped PCB board push on lug connectors.
LH

----- Original Message -----
From: <jwbarlow@...>
To: <motm@yahoogroups.com>
Sent: Monday, April 09, 2001 10:26 PM
Subject: Re: [motm] OT: stranded vs. solid (was: Power One Power Supply Qu
estion)



In a message dated 4/9/2001 6:10:04 PM, jlarryh@... writes:

>I will ba happy to send nice 12 or 14 guage
>stranded wire for synth power supply wiring inside their cabinets to anyone
>that asks and tells me how much they need.

I know you've done this for many people in the past (you are such a
sweetheart). I'm not sure how you are using this wire however, since I'd
think that the MTA .156 connectors would be too small to fit the wire. Maybe
you're using this between the PSU and a barrier strip, eh?

JB



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