"bud--" wrote in message
.. .
You are correct, it detects voltage and will detect a "hot" wire. You
don't need current flow in the wire - there will be voltage with or
without current. ("Indicates live current" in the description is technical
illiteracy.) Real handy for K&T. It is non-contact - you just touch the
outside of the wire insulation. Neon test lights can also be used but
require contact.

Thanks. That "Indicates live current" wording did have me wondering. I
didn't get to go and buy one yesterday but I will today.