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Description
Electricians know that when you are measuring
electrical installations there often appears to be
a voltage, even if you know the wires are non
energized. This is called stray or ghost voltages
and is caused by the capacity between wires.
Because of the very high impedance input of the
meter, this stray voltage has nowhere to go which
will lead to an incorrect reading on the meter.
The solution is to
make sure there is a lower impedance across the
input terminals of the meter. However, this is not
as easy as it seems since it is vital that the
safety of the electrician is not compromised.
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