Heavy Lift Electromagnet from Microwave Oven Transformers | Lrd12 Overload Relay

Wikipedia states most of mainland europe is on TN−S. “This arrangement is a current standard for most residential and industrial electric systems particularly in Europe”, if thats wrong, someone should fix it, preferably someone who has a authoritive position and can quote standards https://en.wikipedia.org/wiki/Earthing_system

First rule of LO-TO: if you didn’t LO-TO it yourself it’s not! I will never EVER trust anyone to do a LOTO for me. If I’m to stick my hands into something dangerous the key to that lock on the switch is going to be in MY pocket!

There are only two conductors run from the substation to a normal one phase installation. Those are live and neutral. Though the neutral is bonded to ground at the substation through the resistor and is also connected to earth at any and all points on the cable where any work is done it is still neutral. At the house the neutral and ground become separate conductors. The neutral is treated as a live wire when working on the system, as far as I know all utilities treat neutral as another phase for safety reasons.

I haven’t seen you around the traps here before and you have put in a good effort so welcome aboard.

It calls out a MOC3041M on the silkscreening. One can use a MOC3041 of course as they are the same form factor.

This certainly looks like one of the more impressive ARM-powered Windows 10 laptops we’ve seen so far. The first few devices ran on the same Snapdragon 835 chip found in Android smartphones from last year, and they showed early promise with some issues that still needed work.

Heat pumps are good as pre-warmers but it’s hard to get really hot water from one without wasting a lot of electricity in the process as you exceed the “point of diminishing returns”. Natural Gas is still the cheapest most efficient way to heat water because it’s fairly easy to make a 95% or better efficiency burner. In Canada you’d likely have to go geothermal which in most cases is nothing but a heat pump hooked to an underground water loop

Most systems now do not distribute ground (earth) from the MV / LV substation. At the sub the neutral is connected to ground through a low value resistor (<1 ohm) to a nest of earth spikes. Live and neutral are then distributed. At the house Neutral will be connected to a suitable ground point and at that point the earth connection is split off from the neutral. This means that any difference in ground potential is slowly leaked through the big resistor at the substation and it is a big resistor, looks like an oil tank maybe 2 metres high and 1.5 metres across. It is also normal that if there is any equipment at a pole it will also have an earth nest for the neutral wire.

You probably think OSHA is staffed entirely by millennials who have no idea what it’s like to lose a limb and act like it’s a big deal or something.

公司自成立以来始终坚持以纯电子商务模式运营、缩减中间环节、为客户在第一时间提供优质的产品及满意的服务、为您的生产以及采购工作提供‘安全 快捷 方便’公司拥有完善的物流供应系统、现已与众多国外知名品牌生产厂商建立了良好的合作关系。

They’ve lifted 200kg so far, and it looks like a pretty cool addition to a shop already packed with other builds, like their MOT spot welder and a propane tank sandblaster.

i have 300w 12v silicon heat bed i just use a 700w pc power supply and 70A relay it heats bed over 100 oC in about a minute no problem