very low voltage -- dangerous?

I'm doing some rewiring and have run into some confusion. I have a
240V circuit, which, when on shows about 240V on my multimeter. When
I flip it's breaker, though, it shows some number of mV (instead of
0). This confused me.

I mentioned this to someone else, and they asked what the amperage was
when the breaker was off. Seemed like a good question. So I went and
picked up a clamp meter that detects amperage. It showed 0. This
seemed strange, so I called the company (Ideal) and they said I had to
put a load on the circuit to detect any amperage. Ok, but that
defeats the point...

Or does it? Maybe that it says 0A when the breaker is off, combined
with a few mV means it's not a problem at all?
.

Relevant Pages

  • Re: very low voltage -- dangerous?
    ... 240V circuit, which, when on shows about 240V on my multimeter. ... I mentioned this to someone else, and they asked what the amperage was ... when the breaker was off. ... A low impedance meter is a good thing to have in addition ...
    (alt.home.repair)
  • Re: very low voltage -- dangerous?
    ... 240V circuit, which, when on shows about 240V on my multimeter. ... I mentioned this to someone else, and they asked what the amperage was ... when the breaker was off. ... The wires on the shut off circuit can pick up some induced voltage from nearby live wires in the panel or anywhere along the length of those wires where they are in close proximity to any live wires. ...
    (alt.home.repair)
  • Re: very low voltage -- dangerous?
    ... 240V circuit, which, when on shows about 240V on my multimeter. ... I mentioned this to someone else, and they asked what the amperage was ... when the breaker was off. ... picked up a clamp meter that detects amperage. ...
    (alt.home.repair)
  • Re: very low voltage -- dangerous?
    ... 240V circuit, which, when on shows about 240V on my multimeter. ... I mentioned this to someone else, and they asked what the amperage was ... when the breaker was off. ... DVM has too high an input impedance, it'll pick up suck stray voltage. ...
    (alt.home.repair)
  • Re: Replacing a circuit breaker 110 Volts
    ... The circuit ... >breaker at the main box didn't look tripped but I find that it isn't always ... >$100+ for an electrician to do it. ... I would attach the + side of the tester to either wire (testing both, ...
    (alt.home.repair)