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This is a fantastic idea: a regular PCB, that gummy conformal coat over any solder joints, solder mask is fine for insulation if you space your traces correctly, and an SSR to turn it on or off. If you have a problem with the thing getting too hot, set a maximum with a variac on the input and you’ll get slower ramps at lower voltage but lower maxima. This is not unsafe, I would think it a fine idea, and I may have a different bed material in mind too.

Over and over again, I have heard HVACR technicians and electricians quote rules of thumb regarding wiring sizing, and I have witnessed and participated in many heated debates on the topic.

I had my poke. Mostly people saying “may” or “could” invalidate your insurance and advising caution. Which is sensible enough. Also mention of laws mandating a professional installing things like new wiring for cookers, and other kitchen / bathroom stuff. Makes sense since there’s water about. This is the UK that I looked up, since that’s where I live. Our electrical standards are pretty high, mandatory ring mains, limits on spurs and wiring length, and even our mains plugs have half a dozen safety features built in (protection against the agony of accidentally stepping on one not included).

Fdx Advisors Inc, which manages about $3.11B and $2.69 billion US Long portfolio, decreased its stake in Dollar Gen Corp New Com (NYSE:DG) by 3,022 shares to 30,873 shares, valued at $3.37 million in 2018Q3, according to the filing. It also reduced its holding in Invesco Ltd Shs (NYSE:IVZ) by 16,189 shares in the quarter, leaving it with 19,801 shares, and cut its stake in Ishares Gold Trust Ishares (IAU).

An assessment of a circuit boards durability and or safety should be based on circumstances and consequences and not false assumptions like “this board will only ever have 240Volts supplied to it”.

The new CMOS image sensor in the Sony A33 features on-chip column A/D conversion, which helps increase readout speed. It also includes the same on-chip analog and digital noise reduction that featured previously in the Sony A900. The Sony A33 also sports an updated BIONZ image processor, with reworked algorithms to allow its signature high-speed burst shooting, plus digital compositing and Full HD movie recording. The Sony Alpha A33 offers sensitivities ranging from ISO 100 to 12,800 equivalents, and can automatically select an ISO sensitivity between ISO 100 and 1,600 equivalents.

I think every power MOSFET in my box, most of them from reputable sources, have packages rated below the die.

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• A 24-V dc circuit • Current waveform for surge is 8 × 20 μs; voltage waveform is 1.2 × 50 μs (these are typical industry-standard waveforms) • Peak current during the surge = 1000 A • The MOV must be able to survive 40 surges • Other circuit components (control IC, etc.) must be rated to withstand 300 V maximum

No, because they are opposite phase. In this setup the neutral wire doesn’t carry any current, so the same 15 amps goes through both hot wires.

L2 EVSE (preferably hardwired) is much safer, plus much better experience. Don’t have people say: “Why isn’t my car charged, it has been an hour?”

Sources: licensed mechanic-level electrician Joe Amato; licensed master electrician Johnny Goudie, owner of John Goudie Electric in White Plains, Maryland; master electrician and electrical contractor Al Hildenbrand, owner of Al’s Electric works in Minneapolis, Minnesota; Dmitri Kara, senior executive of London-based Fantastic Handyman