Nah, they’re just creating the latest OpenSource platform as Arduino LCC, Arduino iso, Arduino Inc and Arduino & Co. fight over which is the real Shady.
Aluminum is only used for specific applications like very heavy feeds and they have special connections for it. Wire nuts when properly used are very reliable. Push locks are not all they are cracked to be sometimes too. We do have them, I have installed literally tens of thousands of WAGO connectors. Generally we do not use fuses here, almost all circuit breakers and most new houses now have arc detect breakers too. They are used in industrial situations where you have 100A+ service to a single machine.
400 Hz is the frequency of choice for aviation. That’s why the PA system in airplanes has *that* particular background tone in it.
Overall, there’s little question that the Sony A33 has the best video AF of any interchangeable-lens camera currently on the market, but if you plan on doing much video recording, I’d suggest you also plan on buying an accessory external microphone to record the audio.
Full-time autofocus. There are several advantages to the use of a translucent mirror in place of a traditional single-lens reflex mirror mechanism. The Sony Alpha A33 uses the design to allow it to simultaneously provide a live view feed with full-time phase detection autofocus. Most of the light is transmitted to the image sensor, while a smaller portion is delivered to the phase detection AF sensor, where it can be used to perform focus adjustments — even during live view, high-speed shooting, and movie recording.
110/220 is the load rating and 120/240 is what the circuit provides. The voltage could sag as low as 110 or 220 in use.
My post outlines the PME system. There are older systems that do run an earth / ground but they are being removed as and when they need attention. The US system is different but the number of countries using the US system is much less than the number of countries that use a similar system to the UK. I am UK based and UK trained.
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When I was doing rehab work on old Chicago apartments I would often find electric wires run through abandoned gas lighting pipes, ready made conduit going to where the old gas light fixtures were, not exactly code and very confusing, especially since there were “live” gas pipes mixed up in the walls and ceilings with the ones carrying Mr. 120!
Great reasons to add L2 to your own garage, carport, parking spot: preconditioning vehicle will not reduce your SOC, lower fire risk than overloading an existing 120V circuit, more efficient charging, added resale value to your house, NEMA 14-50 outlet can be used for other things (welder, RV, heater, etc.), two EVs in the same garage, maximize off-peak charging, cool factor, etc.
We, uh, we don’t have sauna heaters down here. We have air conditioners 
In semi-related news, it was forecast to be 40C today…
Window AC units blast for hours at time and use massive amounts of energy. An extension cord—and usually even sharing the circuit powering your AC with something else—overloads the wires. If they get too hot, the wires could short out and start a fire. Make sure the unit gets its own circuit, meaning a switch on your electrical panel dedicated to your AC and nothing else. Here are 11 more home safety risks and how to avoid them.
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