﻿ November, 2018 - Part 5

## Why, when the heater is turned on, does the voltage drop in one of the phases?

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 and why is it needed in an electrical circuit

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.

## What should be the allocated power for an apartment if 60 kW is connected to the house?

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?

## Connecting a photo relay and a light switch to control street lighting at home

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.

## How to make a fan switch in a shower cabin if 12V comes?

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 to increase the cross-section of the wire PV-1?

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?

## Mounting the LED on the charger

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?

## How to make a household power overload alarm?

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 the wires to the thermostat?

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.

## How can I improve the lighting in the room if the lamp is dim?

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?

## Is temporary contact of aluminum and copper wire permissible?

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?

## Problems connecting a three-phase meter (control flashes)

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.

## Why there is a high voltage in the network and how to deal with it

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.

## Why does the backlight in the light switch work every other time?

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?

## Turn on the exhaust fan separately from the bathroom lighting

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.

## What kind of machine should I put in the apartment, if it costs 25A in the entrance?

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?

## How to build a short aluminum wire in the wall?

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?

## What devices should be used to control the light and fan together and separately?

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?

## How to make change the input cable to the apartment?

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?

## How to protect the heating cable from falling icicles?

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.

## What if the outlet smells rotten?

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?

## Is it possible to connect a live machine?

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?