Google reportedly paid Andy Rubin $90 million after he allegedly coerced sex from employee | Lrd12 Overload Relay

The third incident was also while I was working for the welding repair company. I had a previously perfectly working high-pot tester and needed to test the insulation on a transformer. The tester itself failed and shorted to the case – and I took 11kv AC to the fingers just by turning the power on. That stung a bit, but I got a new high-pot out of the deal, so a net positive.

You are not understanding something correctly with these statements. You do not want a “hot wire” until you get to where the heat is needed so you have to use thick wires if the voltage is lower between your source and destination if you use a lower voltage.

This. An isolation transformer can be a very useful thing, but also very dangerous. If you touch ONE end no problem, but if you touch both ends you will get cooked and the RCD will NOT trip. Or more directly: An isolation transformer does NOT allow you to switch off your brain! And NEVER connect a scope to such a transformer.

Step 4:  Use the V-I curve (Fig. 3) in the MOV’s datasheet to verify that leak voltage will be less than the 300-V ceiling.

That works, it’s a couple of hours work with an RFM12B. And it’s write-only, so you can’t read the status (so no confirmation it actually turned on/off).

I don’t approve of that design. It lacks the third relay, which means that if you plug into two circuits on the same phase, you get 0 volts between the two hots, but both are still 120 volts away from ground. That means that the equipment doesn’t work, but it’s not safe to poke at. I prefer to insure that the 240 volt outlet is guaranteed to either be completely dead, or properly powered.

A user calling himself "Tango" over at the MyNissanLEAF forum posted them yesterday saying, "I wasn’t sure if anyone posted pics of the insides yet, so while they were [installing it], I took a couple of pictures of the innards."

We teach our employees never to trust anyone concerning lock-out tag-out. Everyone has their own personal lock, and most power sources can accommodate multiple locks. Fortunately you just enjoyed an unusual sensation,

Would that we solved with two opto’s per button, one to read and one to press ? Ignoring the LED feature entirely. Because you cannot assign a pin to be both input and output.

A path is the key. To be thrown across a room and to be banged up, ie bashing into a wall, must have been a low current high voltage event that made a path!

I have used a setup like this using two back-to-back “door-bell” transformers (220V to 9V) to play with neon tubes when I was a kid. The current was so low that even a lightbulb wouldn’t turn on. However, it was enough to teach me about electric shock from mains voltage when I have carelessly put my finger across the output terminals …

Tomczyk is a professor of HVACR at Ferris State University, Big Rapids, MI, and the author of Troubleshooting and Servicing Modern Air Conditioning & Refrigeration Systems, published by ESCO Press. To order, call 800-726-9696. Tomczyk can be reached at [email protected] (e-mail).