|
Electricians know that when
you are measuring electrical installations there often appears to be
a voltage, even if you know that 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.
|