Sean has it about right... that's called a "drain wire" in
most places...
You'd want to know which end is which in that case. Thus
"directionality."
Anyone who claims the metal wire or the plastic insulation
is "directional" is, uh, questionable.
In all cases the signal is AC and reverses direction on
each and every cycle, so there is no "direction" to the
signal - think of it as pulling on the rope that makes
up a clothesline with pulleys! Back and forth...
_-_-bear
most places...
You'd want to know which end is which in that case. Thus
"directionality."
Anyone who claims the metal wire or the plastic insulation
is "directional" is, uh, questionable.
In all cases the signal is AC and reverses direction on
each and every cycle, so there is no "direction" to the
signal - think of it as pulling on the rope that makes
up a clothesline with pulleys! Back and forth...
_-_-bear