Re: Can twisted wire replace shielded wire?


"Cliff" <Clhuprich@xxxxxxx> wrote in message
news:spvgo1hu9odvhk74kncekh0iafnstqni89@xxxxxxxxxx
> On Fri, 25 Nov 2005 21:15:28 -0500, "J. Clarke"
> <jclarke.usenet@xxxxxxxxxxxxxxxx> wrote:
>
> >Cliff wrote:
> >
> >> On Fri, 25 Nov 2005 17:40:58 -0500, "J. Clarke"
> >> <jclarke.usenet@xxxxxxxxxxxxxxxx> wrote:
> >>
> >>>Solid
> >>>shouldn't be used for patch cables because it work-hardens much more
> >>>rapidly than stranded
> >>
> >> Copper work-hardens. 5% elongation on the outside of a bend will
> >> do it ... then the electrical rsistance goes up too IIRC.
> >
> >I'm not sure I see your point here. Take a piece of solid CAT5 and a
piece
> >of stranded. Bend both back and forth. You will find that the solid
> >starts breaking conductors in a few flexes, stranded will take much, much
> >longer. This is also why stranded wire is used for power tool and lamp
> >cords.
>
> The solid has to bend about a radius producing an elongation on it's
> OD --- which relates to the internal bend radius + wire diameter.
> Smaller diameter wires (see stranded) don't have to elongate as
> much on the outside of the bend.
> All can elongate a bit over straight sections as well but that
> does not help for this specific bending issue (but does allow the
> fine strands to pass some stretch to areas outside the bend, if
> that makes sense to you). IOW the *outside* (of the bend) strands
> can pass elongation stress to other areas of the wire and slip a
> bit instead of elongating as much as you might think. Not an option
> for solid.
> --
> Cliff

what?


.

Relevant Pages

  • Re: Can twisted wire replace shielded wire?
    ... >Cliff wrote: ... Bend both back and forth. ... The solid has to bend about a radius producing an elongation on it's ... IOW the *outside* strands ...
    (alt.machines.cnc)
  • Re: Can twisted wire replace shielded wire?
    ... >>> The solid has to bend about a radius producing an elongation on it's ... >>> Smaller diameter wires don't have to elongate as ... >>> much on the outside of the bend. ... >>> fine strands to pass some stretch to areas outside the bend, ...
    (alt.machines.cnc)
  • Re: Can twisted wire replace shielded wire?
    ... >> The solid has to bend about a radius producing an elongation on it's ... >> Smaller diameter wires don't have to elongate as ... >> much on the outside of the bend. ... >> fine strands to pass some stretch to areas outside the bend, ...
    (alt.machines.cnc)