The garage voltage is 380V. He turned on the heater and the voltage in the phase dropped from 230 to 190 volts. And in the other two phases it increased to 270 volts. What is the reason?
What is a resistor, how is it designed and what is it for. The principle of operation of resistors and their classification. The main characteristics of this circuit element.
The developer says that the restriction on an apartment of 5 kW is enough for life. These restrictions are on the verge of comfort. What should be the allocated power?
Street lighting along the contour of the house is divided into five zones. Everything should turn on from the photo relay, but the upper part of the house circuit must be turned off from the light switch.
Is there a switch that, when a 12V load appears, would act like a button on a conventional switch, connecting in my case 220V?
Is it possible from a PV-1 wire with a cross section of 1.5 mm.sq. 500 meters long to make a cable 2 * 3 125 meters?
I powered the charger from the mains via the power supply instead of the batteries, but how can I re-solder the LED so that it starts to signal that the battery is charging?
I want to make a sound alarm network load. To operate at a current value close to the trip current of the circuit breaker. How can I do that?
How to connect a temperature controller? The servo drive was connected in the corridor, there were no problems with it. The problem is the wall regulator. I don’t understand how to connect the wires.
In a room of 11 square meters in the center of the ceiling a lamp was installed, it shines dimly. What can be done to improve the lighting in the room?
From the terminal of the machine, an aluminum cable and a copper cable go to the wiring of the room. Is contact between copper and aluminum permissible in this case, at least temporarily?
The three-phase meter according to the scheme is connected correctly (checked 100 times!) When turned on, the control flashes like a stroboscope. What could be? Where to look? Thank.
What to do if there is high voltage in the network of a house or apartment. Causes of increased voltage and ways to solve the problem.
The backlight in the switch began to work every other time. Sometimes it burns, sometimes not. At the slightest touch, the switch may go out. What could it be? How to fix?
As you turn on the light, the fan also plows. Because of this, the fan burns frequently. Is it possible, somehow in the switch, to divide these wires into a two-gang switch.
Hello! At the entrance to the shield there are 2 automatic machines of 25A each. What kind of machine do you need to put in the apartment?
Dismantled the switch, and there was 2 mm of aluminum wire in the wall. With the help of adapters, the wires can not be built up very short, what should I do?
It is necessary in the bathroom to turn on both the light and the exhaust fan with one key. But you need to be able to include only a fan indoors. How to do it?
10 years ago they changed my input cable to the apartment due to the flooding of the basement. We put a 4-core cable of aluminum 6 mm. How to make change the cable?
I ask you to help in solving the question: how to protect the self-regulating cable from icicles falling from above? Interested in ways to protect the heating cable from damage.
The smell of rotten cabbage comes from three nearby outlets in the apartment and, in addition, midges fly out of them. What can it be and what to do about it?
I plan to add another machine in the shield. Is it too unsafe to insert a live phase wire into one of the machines, will it spark?
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How to conduct electrical wiring in an apartment - all stages of electrical installation