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Old 10-03-2012, 09:16 PM   #111
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If there is any significant current at all, the GFCI will pop. I think the voltages I am reading are almost like low voltage static electricity. No current can be measured on my meter at all and this meter reads down really low. It's not unusual to have different things in the house showing a difference in potential it looks like. If no current, or a minuscule amount is there, it seems to me that a probe might not be needed. But I want to study it more. Real interesting topic.
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Old 10-03-2012, 09:19 PM   #112
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Indeed, it is. And you and others input in this thread is a bunch of golden nuggest of electrical knowledge.. which after much studying myself seems like a widely misunderstood topic in reef keeping in general.

I set my meter on AC mA and I read 0.02. That's milliamps right? So 0.02 is nothing to worry about?
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Old 10-03-2012, 09:30 PM   #113
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That is very little current and I think it is safe. As was mentioned by the electrician, it only takes milliamperes to kill you if it conducts across your chest. But that is much more than what you were reading.
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Old 10-03-2012, 09:32 PM   #114
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A good test it it run a temporary circuit (use your meter lead unplugged) from the water to the ground. If that trips the GFCI, I would be really worried. If not, you are probably okay from a safety aspect.
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Old 10-03-2012, 10:07 PM   #115
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Just did that, no problems!

Going to get a ground probe and call it a wrap. Periodically check for ac current as part of my maitenance routine so I can detect failed equipment.

I think a thorough write-up on this topic somewhere would be much appreciated by many.
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Old 10-03-2012, 10:14 PM   #116
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My 4g tests 0.00 AC mA.

I think I'm going to do the unplug test on my equipment in the 55 to see what's giving out the 0.02 and keep an eye on it.
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Old 10-04-2012, 03:37 AM   #117
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Okay just tested the 55 again to unplug stuff. I got a 0.03 reading this time. Unplugging the skimmer pump drops me to 0.01 and unplugging the reactor pump in addition gives me 0.00. So these two are the culprits!

At what levels would they need replacing?
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Old 10-04-2012, 02:35 PM   #118
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I don't know. Certainly not now, these are very low numbers.
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Old 10-10-2012, 11:17 PM   #119
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Installed my grounding probe that I received in the mail today. I now read .217 VAC stray voltage, and 0.00 AC mA.

Hope this helps things.
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Old 10-10-2012, 11:41 PM   #120
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You'll probably start hearing short wave broadcasts from the tank now...
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