I can't believe this video has no comments. This is a great video. Obviously this is over the heads of most people, hence the no comments.

I agree with Brad Castro about these bonding concepts described being over most peoples’ heads. I see this often in the more seasoned or veteran electricians. They’ve seen installations or installed themselves and seen how well its held up throughout their years. Just because something seems to work doesn’t mean it’s been installed even close correct. Good experience is knowing it’s done right. But the best experience is knowing both wrong way and right way. The more knowledge had for the wrong way is equal to how knowledgeable you are about the right way.

This is a good elaboration of the testing method for determining the validity of a bonded equipotential zone around a pool. However this is a basic testing procedure, to ensure the bond will limit current to safe levels (well below 4mA) under a given safe voltage (in pools we tend to assume less than 4 volts) assumption and human body resistance when wet (usually 1000ohms) requires a more thorough calculation assessment in effect close to zero as possible is good. Anything above 5 ohms I would be worried about bond deterioration for the pool equipotential zone. Basically you need a good ohmmeter one than has a continuity resistance range from 0-1Megohm. Megger have some good ohmmeters the model shown is actually a nice classic Simpson 260 ohmmeter it’s range is actually limited to between 0-1000 ohms There are quite a few things to account for a lot of pool filters and water pumps are now double insulated and now bonded clamps for them you cannot bond them not should you once you do the double insulated nature of the equipment is compromised. This is an area that is poorly understood not just the difference between bonding and grounding but the whole NFPA code around pools (in-ground, above ground and temporary store away pools). Leave aside the whole testing issue which as many have said here is above many electricians heads.

I agree, far too often the concept of grounding and bonding is a misunderstood concept, that is essential to an electrical system. An understanding of grounding and bonding or grounding vs. bonding is not touched on often enough or thoroughly enough in the field or in the apprenticeship programs.

Why not use a 10 Amp DLRO Megger/AEMC Meter!

How many people get shocked or electrocuteded