"George" wrote in message news:7PSee.61138$WI3.45634@attbi_s71...
"Pszemol" wrote in message
...
"Russ J." wrote in message
. ..
I am installing a GFCI this weekend.
I will then see what measurments I get.

I do not expect GFCI doing any miracles with your measurments.

A GFCI monitors the amount of current flowing from hot to neutral. If there is
any imbalance, it trips the circuit. It is able to sense a mismatch as small as
4 or 5 milliamps, and it can react as quickly as one-thirtieth of a second. It
will prevent the tank from going "live". If any appliances are leaking current,
it will let you know, and won't let the voltage flow again until the problem is
fixed. Anyone not using them is asking for trouble. In many cities, they are
now required in bathrooms or anywhere where there are live wires and water.
Once enough aquarium enthusiasts get zapped, expect regulations to change for
this industry as well.

Hm... I do not advocate agains the GFCI.
I just said I do not expect it doing any change to his measurements!

If you read the whole thread you would found out he measured 48VAC
between tank water column and the cooper pipes for tap water...
I just know voltage measurements of this kind are worthless.
Yes, very similar to pH measurements of RO/DI water... ;-)