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Re: Poly caps
Chris:
Aluminum has an oxide layer that is of relative high resistance.
Some years ago there was an attempt made to use aluminum wireing in
homes when it was thought that a safe connection method had been
devised. Unfortunately many of the homes that were wired this way
burned down.
Either the connections were improperly made in these homes
or oxigen migrated into the joints and produced a high point resistance
in the contact. My sister once owned such a home and they noticed that
several of the service outlet plates would get very warm under normal
use.
You have to make a connection with something that will cut
through the oxide layer and maintain the pressure. As far as I know
most folks use bolts and washers. I'd be inclined to use a split washer
or a heavy star washer and use a thrust nut to make sure it all stays
tight.
Personally, when I build a cap I go down to one of the local
industrial metal supply houses. They stock heavy gauge copper foil.
It isn't all that expensive provided you can buy it off the roll by the
foot. They stock it because it is commonly used by local artists in various
ways.
Copper is, obviously, a better conductor than aluminum and
you can solder to it.
John
>Original Poster: CTCDW-at-aol-dot-com
>
>Hello, all,
>
>When you roll your own poly caps, what is the best way to attatch to the
>aluminum plates? Aluminum does not solder, etc....the inside of the roll, at
>least will need some sort of wire or bolt coming out to make the connection.
>Anyone with some advice?
>
>Thanks in advance!
>
>Chris Walton