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Which part is wrong? Lets use the IEC definitions of the different systems for clarity and you can educate me with some links to regs where I’m wrong, since I don’t do this for a living or have formal certifications in it. I’ve just a couple of years back installed 380v 3 phase into my barn conversion in mainland France myself and its most definitely a terra terra (TN) earthing system I put in. I had a inspection to get my certificate (certificate du consuel) to connect from a inspector, who during his 3 hr inspection tested the impedance to ground of my independant earth with a megga tester then checked all the earth pins in every socket for spec of impedance back to my earth point, all of which are wired star back to the main consumer unit (ring main is illegal here). We get presented 3 phase wires + a neutral as tails into our main consumer unit from the RCD device (called a disjoncteur) belonging to EDF (supply company) and its not permitted to bond neutral to your own earthing system under the regs.

There is a lot there, but here are two highlights that directly apply to you as an HVACR professional. This comes from the 2017 edition of the NEC NFPA 70.

LOL– I stepped into doo-doo deep enough to over top chest waders, I’m over six feet tall, so that’s deep doo-doo. First I was surprise to learn that the heated beds weren’t heated by line voltage, IMO that’s a no brainer. Appliances across the word use line voltage to produce heat with no shock hazard present when use properly. Getting back to the deep doo-doo. Hackaday does present instruction posts. Line voltage is useful resource that is avoided because of irrational fear. I’m calling irrational because the fear is due to ignorance. I suggest Hackaday create instructional post on how to use line voltage in a way that’s safe to life and doesn’t cause property damage when something goes wrong. Peer reviewed studies and guidelines information is preferred.

Air conditioners work hard to keep you cool, and you don’t realize how much you rely on them until you are stuck in a sweltering room with no relief. If your air conditioner suddenly goes out, there is no need to panic. Follow these simple steps to bring your A/C unit back online and you may avoid the need to call in an expensive professional.

The place to start when talking about mains-voltage equipment is your bench. We realise you’ll probably be working at your kitchen table or wherever you happen to be, but it’s best to start an article like this with a baseline, of what you really should have when doing this stuff. There are three things we’d consider essential in the mains power system on a mains-voltage bench. An isolation transformer to power the item you are working on if it needs a mains supply, a residual current circuit breaker for the rest of your mains supplies, and an emergency isolation switch for all bench power.

Agreed, the component is under rated from the start. If you look at a datasheet from a 25A SSR from a better company you will find something like de-rating curves which really show that as you move from the ideal conditions (20C temp, infinite heatsink) you should only use a smaller load. It is pretty easy to reach a limit of half the max load in normal conditions.

Farewell, then, Toyota Auris, welcome back Toyota Corolla. Goodbye countless marketing millions spent establishing a new name and fresh reputation, hello old friend. Out with the old and in with the older, although it is surely not just me pondering why the passing 13 years have replaced recollections of the dull but worthy family hatch with a nostalgic fondness, lightly sizzled by memories of victorious Castrol-sponsored world rally cars?

At the end of the day all power supplies deserve respect, not least because they’re more likely to kill you by burning your house down than through electrocution.

Naturally, the instructions are a bit specific to the Pentair system he has. However, it isn’t as specialized as you might think. The project relies on the connection for a wired “spa-side remote” that most modern pool systems support. The electrical connections for these aren’t quite standard, but they are all very similar, so you have a good chance of reproducing this for your setup assuming you have a connection for one of these wired remotes.

• Calculate how much power you need: Generators are sized based on the power they provide an average home. Go through your home and identify the lights, electronics and appliances you want to run and the watts they consume. That’s simple enough to figure out with lamp or light fixture that takes a 60-watt bulb, and tougher to determine with your refrigerator. Aiello says to look for the data plate found on most appliances. It should tell you the volts and amps. Then do the math: Volts multiplied by amps equals watts. Or go online and look up the specs. Generac also has an online portable-generator sizing calculator you can use as a guide.

Didn’t have to purchase any EVSE. My 2016 Volt came with one, that was L2 capable. You only needed to make a pigtail. It’s actually a Clipper Creek. So, for about $60, I installed a NEMA L6-20 outlet, with 20amp double-pole breaker, and 8 ft of 10-4 wire that I had left over. $20 got me a permit.

Before we begin, we must begin with an obligatory disclaimer: handling mains voltage can be very dangerous. Do not do so unless you are qualified! You could burn your house down. (Without the lemons.) That being said, [TJ] has created an interesting dev board for controlling mains voltage over WiFi with the now-ubiquitous ESP8266 module. At only 50mm x 25mm, it is easily small enough to fit inside a junction box!