Here’s What You Need To Charge Your Electric Car At Home | Circuit Breaker Parts

Invensys Triconex: 冗余容错控制系统、基于三重模件冗余（TMR）结构的最现代化的容错控制器。

There are lots of big name professional meters that share the same ports for both. My Klein shares them.

Remember that, across the same resistance, power goes up with the square of voltage; 120v RMS can deliver 100x the wattage of a 12v supply, and 240v delivers 400x.

While not quite as light as the Olympus E-420, which lacks an in-body image stabilization mechanism, the Sony Alpha SLT-A33 is certainly in the same ballpark. The A33 weighs 17.3 ounces (1.08 pounds, 492g), with battery and flash card (but no lens), while the Olympus E-420 weighs 15.7 ounces (0.98 pounds, 445g) loaded but without a lens. The lightest SLD, Sony’s NEX-5, weighs just 17.7 ounces (1.1 pounds, 502g) loaded and with its kit lens attached — just 0.4 ounces more than the A33 body without a lens.

What about converting down to 12-24v AC for the bed with a ZVC switch going to the controller? It seems that running it off DC is wasteful but mains is relatively risky.

BTW, one can’t just put in a big red button and call it Emergency Isolation Switch. At least in an industrial setting a Emergency Stop follows strict guidelines which include possible damage to the machine from using it. There are rules and regulations for how these are wired, where they are placed, etc. One doesn’t just run mains power through it. Typically these are low voltage switches that cut power to coils of high current contactors and relays.

Still, most capitalists, when you order something, don’t ask “what do you want it for?”, so they can substitute something else without telling you. Generally in contracting with capitalists, mysterious “problems” don’t regularly as clockwork pop up, increasing the cost above what was agreed.

Anyone “hacking” an appliance that can literally burn down your house, voids any safety certifications the appliance was manufactured with. The insurance company would ‘probably’ have the option of simply denying any claims arising from a fire caused by the hacked appliance. This is speculation since I’m not an attorney, but it would be prudent to consult with a knowledgeable agent before undertaking any such projects. My policy specifically excludes “events” as a result of deliberate modification of appliances that the manufacturer of said appliance has not authorized.

Yeah, dont use these. Use a relay instead. There is a reason all the high end stuff went away from the Triacs as they will float to full mains voltage when no load is connected and you get electrocuted when you mess with the circuit. AMX, Crestron, Lutron, etc all have moved away from pure Triac control due to this safety issue.

As someone who started playing with electronics in the days of B+ in the 350VDC range with double that across the main xformer’s secondary, I was utterly appalled at the idea of tying myself to a hard ground when working with some of the newer (for the time) solid-state stuff that was coming out. We had a respect for high voltage then that is often missing these days, this article is an excellent reminder that this is still needed.

Here is something to think about; Those floor finishers were doing this back in the days when “the code” only specified two wire outlets. . These days that would make a few people nervous. No case ground for the sander….

Haven’t really looked at how the eBay feedback system works these days, but is it still the case that if a buyer gives a seller a negative no matter how well deserved, he can pretty much expect a negative in return?