Is my appliance compatible with the Amazon Smart Plug? | 25 Amp Circuit Breaker

The best defense is to make sure you buy from reputable sources, not from some backyard hardware store or eBay.

24v 12a is not that much more at 288watts. I’m sure I’m missing something to do with electromagnetism which makes the secondary unnatractive?

How are you implementing the power calculations, out of curiosity? (I have designed a couple of AC power meters before, so it’s somewhat of an interest of mine)

This is true in a certain temperature range, I think between 70 and 90% of their nominal power. And in spite of that there are so many lamps with halogen bulbs, which are fitted with dimmer circuits. And you know why? Because the bulbs are very cheap, so nobody cares And they are often used as heating elements: in a professional reflow oven (3000,- euro class) and in laser printers. But in the end I think for the heated print bed you do NOT want a radiative heat source, it complicates the things

The controller board for the heat pump in our “3 Season porch” fried last January during a cold spell. All of the house plants we were keeping in there froze to death. SE Minnesota

In reviewing my experience with the Sony A55 and A33, it’s interesting to find so many of my notes and so much of my attention directed to the viewfinder display. Were I not already so familiar with Sony’s multi-shot exposure technology, the camera’s multi-shot features would doubtless have commanded more of my attention, as they’re worthy features indeed. That said, though, the viewfinder turned out to be absolutely integral to my experience with the camera.

Knowing the sequence of operation for this type of starting relay can help you diagnose, confirm, or rule out certain service problems.

Video capture is an area where the Sony A33′s translucent mirror technology makes a huge difference relative to pretty any other SLR currently on the market, and relative to even fast-focusing SLDs. Every other interchangeable-lens camera currently on the market either doesn’t autofocus at all when recording videos, or has to resort to slower and/or more obtrusive contrast-detect focusing. Because the Sony A33′s phase-detect AF system is always looking at the subject, fast autofocus during video recording is no problem.

I think most people recommend having the PSU switched off at the wall. That way it should be pretty much safe, but there is still the other issue you mention.

My 2 stage 23 x 24″ CASE snowblower I home-made converted to a 3 hp extension cord electric (240 on the Tesla outlet – peaks at 35 amperes and 7 1/2 hp). I was worried that I had underpowered it but last March when all the gas blowers on the street were stalling on heavy water laden snow, mine just kept barreling down the sidewalk.

Comparable relay product datasheets from Omron suggest that without appropriate heatsinking, the current limit should be in the range of 4A to 7A.

Low current (and damage-reducing high-frequency skin effect) on the Tesla coil’s HV secondary. Mains frequency penetration, arcability and cross-heart lethal current on the neon sign transformer’s secondary. So, it’s good that my wakeup call went in & out of the same arm.