RE: [ST] Electrics

[Andrew Bell <abell@xxxxxxxxxxxxxxxx>]

It's my understanding that as the copper is subjected to heat/cool cycles 
it will work harden or become brittle. When you add in the fact that the 
wire is in clothing, that will be scrunched, twisted and subjected to wear 
the odds of failure increase over its use in a static design.
Nichrome is designed for not becoming work hardened when operated within 
its spec's, is rather springy and will hold up to 'wear' in clothing and 
the like.

As usual YMMV,


At 04:17 PM 9/26/01 -0700, you wrote:
>Can you explain why and how copper would wear out? If it makes any
>difference, its silver coated copper wire, and is sold as high-temp wire. I
>see no reason why it would break, as it is very flexible.
>
>Thanks,
>
>Chris Strizver
>
>  -----Original Message-----
>From:   owner-st@xxxxxxxxxx [mailto:owner-st@xxxxxxxxxx]  On Behalf Of Andrew
>Bell
>Sent:   Wednesday, September 26, 2001 12:45 PM
>To:     ST@xxxxxxxxxxxxxx
>Subject:        RE: [ST] Electrics
>
>you really might want to stay with nichrome wire , copper won't give you
>longevity. There are also carbon fibre weave heating elements available. I
>don't have those sources handy though.
>
>
>At 11:55 AM 9/26/01 -0700, you wrote:
> >The copper wire that I got is tephlon coated for lower voltage heat
> >applications. Maybe get some of this instead?
> >
> >-Chris Strizver
> >
>
>Andrew Bell, Test Technician
>Mixed Signals/ULTECH
>
>e-mail: abell@xxxxxxxxxxxxxxxx
>Tel: (203) 758-8667
>Fax: (203) 758-8693
>Web:www.mixedsignals.com , www.ultechvideo.com
>
>
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Andrew Bell, Test Technician
Mixed Signals/ULTECH

e-mail: abell@xxxxxxxxxxxxxxxx
Tel: (203) 758-8667
Fax: (203) 758-8693
Web:www.mixedsignals.com , www.ultechvideo.com


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