What Most Techs Get Wrong About Wire Sizing | 2017-09-18 | 19mm Momentary Push Button

You’ll notice that there’s a single general lighting circuit that’s warmer than the other breakers in this panel; again, it’s only a small increase in temperature, so I’m not concerned. If it were much warmer, I might question why.

All of this, if you suppose that you are taking a full hand of cable. Got shocked a few times with AC (and DC as well) and since I was just thouching, not handling, I had no trouble to get away with it (just swearing A LOT and throwing my screwdriver through the room).

I stuck a finger in a light socket when I was about 3 years old back in Brooklyn NY and got a momentary buzz sensation. Nothing more. I got a few more 110V shocks as a US Army Air Force student of electronics back in 1944. No problems but I was warned to keep my left hand in my pocket in uncertain situations to not form a circuit through my heart, Here in Helsinki where I now live I have taken 220 V a couple of times. Nothing I’d recommend but no harm done. Nevertheless, I’m careful and never fool around with wet hands.

two suggestions… 1. bridge it and use as a 230v rectified/ cleaned up DC as per your choice 2. as with pop up toasters and hairdriers, use convection and radiation instead of conduction. use a hot coil and duct the hot air for circulation under the bed.

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 agree. Plus, from my experience using remote controlled outlets, when the 4A inbuilt fuse dies because of reasons, the relay stays intact. O the other hand, I have never seen a light dimmer with blown fuse, just blown triacs.

If you run a separate earth wire that is hard grounded at the sub and hard grounded at your house and nowhere in between. In this situation if you get a lightning strike at or near your house then the ground potential rises. This flows through the earth wire to the sub ground and can be a massive current, enough to make the network fail dramatically. This rise in ground potential can also be caused by other things such as a faulty insulator on an MV or HV tower (pylon) or pole. Even if insulators are good then you can still get this ground potential rise. You can easily measure it with a length of wire and two earth spikes, put one near a tower and the other a distance away and you can see a significant voltage. If you also have a separate wire called neutral running form the sub then the potential between that wire and the earth wire is unknown so you have a risk of lethal voltage between neutral and earth, a situation that is not expected and potentially extremely dangerous.

You are right, of course. I should have used “shock” instead of “electrocution”. English is my secondary language…

Having sorted out your bench, how about your tools? The chances are you’ll already have everything you need in this department, but it’s worth saying here. If you are using a tool or an instrument on a piece of equipment carrying electricity, it has to have the appropriate insulation properties for the voltage in hand. Perhaps you have to have experienced insulation breakdown in a cheap test probe at first hand to truly understand this point.

All this stuff makes me think it might be time to get a Faraday cage installed around my heart. Or maybe a big shunt from shoulder to shoulder.

If existing nominees don’t get confirmed before this congressional term concludes, they will have to be renominated by the White House in the new year. McConnell has emphasized that getting as many nominees through as possible is one of his key priorities this term and the next.

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.