﻿ August, 2018 - Part 3

## What diodes to use for the diode bridge?

It is necessary to start a 220 V DC motor with a power of 4.5 kW. What diodes to use for the assembly of a rectifier diode bridge?

## Online calculation of cable voltage losses

Online calculator for calculating cable voltage losses. Formulas with which you can independently calculate the voltage loss in the cable line.

## Inductor calculator

Online calculator with which you can calculate the coreless inductor. Formula for manual coil calculation.

## Is it possible to connect the phase to the switch, and zero to the outlet?

I want to notice a single-key switch on a two-key, connecting the backlight of the kitchen. Is it possible to connect the phase to the switch, and zero to the outlet?

## How to find where the short circuit occurs?

He knocks out an automatic machine that stands on a wall outlet. Sometimes it knocks out right away, and sometimes after some period of time. How to find where the closure occurs?

## Can I use a slow cooker if there is no grounding?

The instructions say that you definitely need grounding for a multicooker. Small family, voltage 220 volts. Can a multicooker be used without grounding?

## Color Resistor Calculator

Online calculator for calculating the color marking of resistors in 4 and 5 bands. Using the selection method, you can determine the resistor value by color coding.

## Connecting a house to two power grids

Can I connect through the electricity meter to both the village and SNT? The point is that when problems with light switch temporarily to another line?

## What introductory machine to put if allocated 15 kW 380 volts?

Allocated 15 kW 3ph. In the shield you need to put a 3p automatic machine on 25a? Or below par? Or put the machine in 32a in the input shield above for example, and in the house at 25a?

## Is it safe to place the electrical panel in the wall adjacent to the hallway and the kitchen?

How safe for living is the presence of a floor electrical panel mounted in the wall of the apartment, from it there is a wiring of 11 apartments. Wall adjacent to residential.

## Is it safe to leave a broken outlet or is it better to turn off the electricity?

Turned on the lamp today in the socket. The lamp in the lamp burst, and the outlet stopped working. Do I need to turn off the electricity before the arrival of an electrician?

## What to choose for installation in the apartment: automatic machine and RCD or difavtomat?

I want to put two machines and an RCD or Difavtomat. What's better? What power reserve is better to put a difavtomat? What is the power for automatic machines, RCDs and differential?

## Selection of voltage relays and RCDs in the apartment

The apartment is a new building. There is a counter at the entrance and AB 50A. In the apartment switchboard I want to install a voltage relay and an RCD, but which ones to choose?

## Online direct wire inductance calculation

Online calculator for quick calculation of direct wire inductance. Formula with explanations for calculating the inductance of a direct conductor.

## Will the wiring withstand the induction cooker 5 kW, if 12 kW is allocated?

Where goes 12 kW. We want to put an induction cooker of 5 kW. In addition to the stove in the house, the rest of the equipment. Will the wiring stand or is it better to put a gas bottle?

## How to connect the outlets in the house: in series or with a star (in parallel)?

Can I put the sockets in one room on one 16A machine, feeding them sequentially on a 3 * 2.5 cable. Or do you need to pull your cable to each outlet?

## How to make the lamp and spotlight work from a motion sensor?

I connected a lamp and a searchlight with a motion sensor to one switch. How to make the lamp work and the projector lights up only from movement?

## Can the fan on the welding machine be replaced?

Please tell me, the 24V 0.33A fan broke during welding. Can I replace with another 24 V 0.20A fan?

## Why is the floor shocking when the washing machine is operating?

The washing machine is in the kitchen, the floor is tiled. When the machine was working, it touched the floor with a wet hand and I was struck by an electric shock. How can this be fixed?

## Why does the machine knock out after interfering with the wiring and no longer turn on?

After interfering with the wiring, the machine is knocked out and does not work anymore. Even if interference with the wiring is not accompanied by short circuits. What is the reason?

## Voltage divider calculator

Online calculator that allows you to calculate the voltage divider on the resistors. A quick way to calculate the current and voltage divider.

## Damaged the wire from the outlet when puttying a hole in the wall

We closed the hole in the wall with stucco, from which the wire from the outlet protruded. Accidentally hit the wire itself, it began to smoke and crack. Is it dangerous?

## How to check the varistor: external inspection and dial multimeter

How is the varistor checked for serviceability. External inspection of a varistor and a proverb by a multimeter or a megaohmmeter. The causes of the malfunction.

## What is a varistor and why is it needed?

What is a varistor, what is its principle of operation and purpose. The main characteristics of varistors. Rules for choosing this protective device.