They installed a voltage relay in the cottage and noticed that on the screen of one relay the voltage changes from 220 to 230 volts, on the other two from 240 to 270. What should I do?
Why the transformer in the speakers, power supply, microwave, amplifier and other devices can buzz, and also what to do in such a situation. Causes of increased noise during operation.
I want to make a separate electrical panel and sockets for connecting powerful electrical appliances such as a compressor and a welding inverter. Tell me how to assemble an electrical panel?