FWIW (not much probably :-)) the choice of a "tinsel" lead may be an
excellent one depending on whether the voltage drop or the life under
flexure are the most severe constraints.  Tinsel (yep, that is the
real name the BPO used to call the leads with fibre core and flat
wrapped stranded conductors it way back when (AFAIR there was even
British Standard Tinsel :-))) was designed for a superb fatigue life
under conditions of severe flexure. Don't try to solder it though -
it can be done but crimping is the intended termination method. (I'm
48 fwiw) If power loss in the lead is small enough that it doesn't
get noticeably warm and if the voltage drop is tolerable in the
application then I'd start looking at the flexure performance.

>BTW Telephone Coiled handset cords are probably the poorest choice
for ANY
>load greater than 50 MA. Typically they are composed of small flat
(ribbon)
>conductors wrapped around a fiber filler... At least this is the
experience
>of this 53 year old Engineer...




regards



                        Russell McMahon