I understand your concern with that. It is why I run my system on multiple GFCI's. A trip of a single GFCI will not cause a loss of flow in my tank. With my controller, I get an email alert letting me know if a GFCI does trip. My tank would be fine for a day if one does trip.
It will be grounded through the lead on the meter as it requires a path to get the reading to earth
Typically, the term "grounded" is used to indicate a low resistance connection to ground. The meter while in voltage testing mode will create a path to ground but it will have a very high impedance.
An RCD (Residual Current Device) and a GFCI (Ground Fault Circuit Interrupter) are 2 names for the same thing. RCD is the preferred term in Europe but they function the same way.
That's why I'm not putting a gfci on my tank as the circuit board my tank is on has one.
Not that I am aware of, at least not with readily available equipment. It could be done with highly specialized magnetic sensors but these types of test sets run $100k+.
Thing is I've worked in the switchboard manufacturing industry for nearly 23 years for universities, hospitals, windfarms and many other places that need them incorporating auto changeovers for mains and generator and deal with 24v, 30v, 115v, 230v and 415v and all the way up to 6000A but that's in enclosed metal box with no water in sight.
A true DC pump would induce very little voltage. True DC motors all have to have carbon brushes connecting the rotor to the stator. What we call DC pumps still have some form of alternating voltage. So, with that said...Thing is I've worked in the switchboard manufacturing industry for nearly 23 years for universities, hospitals, windfarms and many other places that need them incorporating auto changeovers for mains and generator and deal with 24v, 30v, 115v, 230v and 415v and all the way up to 6000A but that's in enclosed metal box with no water in sight.
So I know absolute squat about how electricity is induced with AC and DC pumps in a 24x18x18 and how it gets there, even if I know I'd forget how to do certain things in my job as I can learn so much
Yep that helps. Thank you.A true DC pump would induce very little voltage. True DC motors all have to have carbon brushes connecting the rotor to the stator. What we call DC pumps still have some form of alternating voltage. So, with that said...
Faraday's law is only actually defined as an equation. The best explanation I can give is that a conductor within a magnetic field will have a voltage induced if there is relative motion between the two. Since it is an equation, it also holds true that current flowing within a conductor will generate a magnetic field.
Salt water is a conductor. Our wires and pumps have current flowing through them which generates a magnetic field. The fact that the current isn't constant (AC) provides relative motion between the water and the magnetic fields so a voltage is induced. This also shows that more voltage will be induced if you have longer runs of cable or higher amounts of current flowing through that cable.
Does that help?
With your RCCB you shouldn't even feel a shock. It should just trip the breaker if you have an issue. Voltage is also a peculiar thing and it means little without a reference. We normally reference voltage to ground. If you have 96V in your tank, and put your hand in it wearing insulated boots, you will become energized to 96V and it won't cause issues. I know of no reasons why 96V of induced voltage would be any better or worse than 5V of induced voltage.
I agree I only turn an item off if I'm cleaning it. I did that experiment with 1 boot on and 1 off , swapping feet the meter went from 96v down to 22v sad but I had to try it.ive been shocked with 415v a few time and with a 1000v insulation resistance tester, not the 2500v flash test I have to use on occasion though, that might sting a little more.
