16-channel solid-state power controller for military and aerospace applications introduced by DDC | 220v Contactor Relay

Arc-Fault Circuit Interrupter (AFCI) circuit breakers run warm. This is normal, there’s nothing to report here.

Speaking of mains power and gas pipes, I live in a 100-year-old house which has some rather dubious wiring (though, perhaps not as bad as the knob-and-tube it started with). The kitchen’s gas range had been in place since puke green was the preferred color, and its power cord (for the clock & timer) was, unbeknownst to me, seriously frayed. The range’s gas inlet was connected to the shutoff valve on the wall with one of those scary-looking flexible tubes (not a modern, yellow insulated one, but rather bare metal). Well, one day the range got pushed back for cleaning, and the exposed hot lead in its power cord brushed that gas line. ZAP!, followed by a roaring jet of flame from the large hole now in the flimsy gas line. I couldn’t get close enough to the shutoff valve to use it, so I had the frantically seek out a big wrench and shut off the gas where it enters the house in the basement. By then the wall behind the range was well and truly aflame (way too big for my wimpy little fire extinguisher to deal with), so I threw pans of water on the fire. I figured the breaker for the outlet the range was plugged into had already tripped, but it later turned out that the contact had been too brief for that and I was throwing water on a live electrical circuit–no harm came of that, fortunately.

Take a look at the Lennox air conditioning condensing unit tag on Page 19. Notice that the MCA is 28.6 amps and the maximum fuse or circuit breaker is 50 amps. This means it is allowable to install this unit on a circuit breaker rated at 50 amps and a conductor rated at 28.6 amps, according to the NEC’s NFPA 70.

Waterjet, who seemingly has no concept of how a basic opto-isolated diac-driven triac circuit works, chimes in with useless blabber about insufficient current ratings of the *optoisolator* — seriously? If you’re going to throw stones at someone, perhaps you could verify that you have somewhat of a clue of what you’re talking about?

They made me a 110v silicone rubber heat bed with adhesive backing at the size I wanted with 2 integrated thermistors and appropriate cabling for like $60 delivered to my door. Add a 110v relay and you’re good to go. The Eustathios and Herculien builders group have been using these for a while.

I don’t use my infrared camera as a quantitative tool; I use it as a qualitative tool. Yeah, I know, more blowhard words. Put simply, I’m not too concerned with the exact temperatures that are displayed on my infrared camera. As a home inspector, what I’m concerned with and what I dig into are the meanings behind unexpected temperature differences, aka anomalies.

It’s neither a sports car nor a hot hatch — it’s just a tall hatchback masquerading as a crossover. It handles a bit better than most commuter appliances, due to the 258 pound battery mounted low in the chassis. Imagine strapping me, Keanu-under-the-bus-in-Speed style, to the undercarriage of a car. That would let the car hug the road a bit more (and seriously wound your favorite bearded auto writer, so let’s keep this hypothetical).

This hack is ridiculous and a hazard. The NEC bans the use of MWBC’s that don’t use a common circuit breaker tie-bar. The tie-bar causes both halves of the 240VAC circuit to turn off incase of an overcurrent condition.

I found the Sony A33 and A55′s AF tracking to be very fast and pretty accurate; almost too fast in some cases: If I let the central AF point wander off the subject for a fraction of a second, focus would quickly shift to the background. Many of the missed-focus shots I took were the result of this problem, versus the camera not being able to track focus quickly enough. Some high-end DSLRs have settings in their autofocus systems to adjust how quickly they respond to momentary loss of the subject. (Either from the AF point drifting off the subject, or for some interfering object passing between the subject and camera.) If Sony were able to add this capability to the A33/55, it could go a long way to reducing the number of missed shots, at least based on my experience.

The UMC equipment included with the Model 3 LR can supply up to 32 amps. That’ll charge at a bit over 30 miles an hour.

Online reviews are useful when you’re on the hunt for a trustworthy electrician. If the person with the lowest quote also has the worst ratings, it’s worth shelling out a bit more. If that cheaper electrician messes up, you’ll just need to call me (and my higher price) and pay more overall.

And you’d need to think about seperation (diodes to seperate the two paths?) if you wanted to read a local button press verses a node press, or would you be better off just doing that in software. Detecting a button press and checking to see if the node had recently issued one itself.