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Could A Fire Have Caused The Loss Of MH370? | 19mm Momentary Push Button

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I couldn’t even find a de-rating chart or graph online for this relay. Also, many SSRs (and other devices) do not recommend the “bottom” orientation for heat sinks.

You can also see the top of the mechanism for the tilt / swivel LCD panel, peeking out on either side of the electronic viewfinder. The viewfinder itself projects quite a bit from the rear of the camera, a decision that was apparently necessitated by the tight packaging of components in front, including the AF module, popup flash, hot shoe, and microphones.

I’ve spent four to eight years in apprentice school learning how to plan, install, inspect, and repair electrical products. Don’t insult my intelligence by implying otherwise.

Not really clear but good point. I met an electrician who told me : ‘230VAC is not dangerous, I’m getting shocked a lot, it really hurts when its 400VAC. Oh by the way, I have to get an appointment for my heart !’

Motor circuit breaker	GV2P21

Cooking Triac? In my experience there are only good Triacs and bad Traics. You can tell the bad Triacs because they usually have a a little bit of plastic encasing still attached to the three legs after they have exploded.

This is the sort of topic where it wouldn’t be a great idea to be dismissive of textbooks and/or formal instruction. Often local power line crews will put on a safety demonstration at hamfests. No doubt they would do the same for the various builder/hacker/maker spaces

The customer changed their tune. My boss was impressed (though not enough to give me some coinage for ingenuity) and the electrician was told to change the breakers and add the new feeders to support the load. Got a lot of recommendations from that customer in the years after that.

Keep in mind that for a circuit to have a rating above 60°C (140°F), the wire as well as the breaker, disconnect lugs, and connection lugs in the equipment must all be rated at a temperature at or above the temperature rating being used. If any portion of the circuit utilizes non-metallic (NM) cabling — often known by the trade name Romex® — it must be rated at 60°C (140°F) according to article 334.80 of the NEC.

Motor circuit breaker	GV2P21

After checking to make sure the outlets are wired correctly, a 220v light bulb with light up across the two hots if they are opposite phase and not if they are the same phase.

OK … back to the task at hand. Anyone care to comment on how a toaster oven is wired? How about a thermal blanket? None of these use a 12V or 24V switching power supply brick, so how do they do it???

PS I understand L1 will work for many people (up to maybe 40 miles per day driving), I disagree that it should be encouraged due to safety concerns and most general people won’t properly care for the L1 charger.

Not always, you have to think on a global scope here before saying generalizations! In the UK a lot of houses are on what they call PME or protected multiple earths, where the earth bond goes back to the substation as a extra conductor. If you are in one of these properties and are not aware of it, and have your own ground system or leakage you can end up being lower impedance than the substation ground and grounding out faults in your neighbors properties which are also on the same bond. Where I am in europe, all the houses are individually bonded to their own low impedance earth, and the inspector comes out with a megga tester and tests its impedance before they will sign you off to connect to the public supply. It has to be below 50ohms total from any gnd pin on any socket in the property I remember from my inspection. I laid a load of mesh subfloor before pouring the floor so I had no problems with meeting spec. A nice low impedance earth will make your rcd and protection devices even more sensitive also.


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