Looking Mains Voltage In The Eye And Surviving | 220v Contactor Relay

Before we get too deep into this topic of wire sizing, let’s acknowledge that while detailed conductor sizing is the job of engineers and electricians (not HVACR technicians), there are many cases where contractors are tasked with assessing whether a breaker or conductor (wire) is adequate in both retrofit and service situations.

It’s OK, you can admit it — from the time you first saw those huge electromagnetic cranes in scrap yards you’ve wanted to have one. While it may not fling around a car, parts donated from scrapped microwaves can let you build your own electromagnetic lifting device and make that dream finally come true.

My grandmother had a set of glass topped buffet serving tables where the glass top had a foil element sandwiched between the glass layers. They plugged right into the wall. No components other than the heating element, line cord, and a neon bulb to remind you it was plugged in. The element terminated with a couple of fused in copper rods threaded to take nuts. Got too hot to comfortably touch, but warm enough to keep your food hot. It should be within the capabilities of a glass/ceramics hobbiest with a kiln to sandwich a foil element between two pieces of glass and fuse the sandwich together.

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If you’re worried about activists using media to promote fear and doubt about science and medicine,you’re in the right place. At Science 2.0, scientists are the journalists. with no political bias or editorial control. But we can’t do it alone so please make a difference.

Beside the Canadian electrical code require fully dedicated 20 amps circuit for 120 volts vehicule charging. Common receptacle are week and cheap and are worn by abuse plugins and pulling all sorts of appliances in and out.

Yes, there is a difference in running AC and DC through a rectifier. As as Limroh states, only two of our rectifying diods will be used, and therefor be under higher stress.

That depends on the country. I live in Europe, and people here are allowed to do basic repairs and modification with mains voltage, like adding extra outlets. All the materials such as PVC conduits, wires, outlets, lights, switches and dimmers are readily available in the hardware store. It is however not allowed to mess with anything before the meter or fuses. Some equipment like electric stoves don’t come with power cords. Instead, you open up some compartment, and attach the wires on some screw terminals.

I think a lot of the negativity is par for the course on Hackaday when dealing with HV (or other areas with safety concerns) projects. I got my share of the same thing with my “Quick 220 clone” project. Such projects should garner a healthy dose of paranoia, but I think where it goes wrong is when that converts into unfriendly skepticism – that somehow it’s impossible for an amateur working alone to build something that would pass muster with UL or CE.

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Even if a business without a license can charge you less, it’s worth looking for a licensed electrician like me. Most states require professional electricians to be licensed, so a person without one is a red flag. He or she might not have insurance and could stop picking up the phone if something goes wrong. As a licensed electrician, I will be held accountable—which is good news for my customers. Check out these other 35 things every homeowner needs to know.

It may be just perception coloured by the general work environment, but a lot of the US regs seem driven by liability concerns. Too many lawyers.