# Advice 1: Why you need a line of 380 volts

Basic equipment in the house works, feeding from the line voltage 210-230 V. Accordingly, the input often do with a single-phase supply 220 V. However, for heating or climate control uses equipment that requires three phase power supply of 380 V. Also, when a large number of connected devices make sense to split a supply line into several phases to protect the entire system against overload.

## Where does the 380 volts

Air lines between towns, cities and large enterprises are high-voltage high-voltage lines. With this voltage transfer of electricity involves fewer losses. Even taking into account the work of stepdown transformers. At CTU, standing in the settlements with residential houses, blocks of apartment buildings (factories usually entire substations), high voltage is converted to 380 volts.

There are 4 wires, sometimes they used a system of five wires. Three wires – a separate phase. One wire is zero. The voltage between any separate phaseof mi is 380 volts. This line voltage. The voltage between a single phase and neutral wire is 220 volts. This is the phase voltage. Phase never connects, not even touch, otherwise it will short circuit.

## What is 380 volts

In the apartment, employing only a TV, a fridge, and occasionally the vacuum cleaner, the load is small, so you can do just two wires: phase and zero. When talking about the house where there is a garage and workshop or a sauna, and a pool where the weight of household appliances, ventilation system or is being heated with electric heaters, it is better to have four wires and provide a linear voltage of 380 volts.

This allows to distribute the load over the phases. For example, a garage and a sauna to "sit" on one phase, the kitchen on the other, everything else third. Phase separation occurs when you install a distribution panel. For power equipment, for example, electric motor, welding machine, electric boiler, electric or splitsistemy, you will have 380 volts on the plate in the house.

## How to connect a line of 380 volts

When connecting at home is calculated by the project power consumption. The fact is that when connecting a power supply company allocates a limited amount of power. For example, 3 kW with 220 V and 3 kW 380 V, which are taken from the nearest support. Anything above connects directly with the nearest transformer. The cables from the transformer to your home is usually laid at the customer's expense, that is payable by you.

If you need in the house and 380 In the economy, you have to stretch a line or a cable laid on the ground. Calculation of the cross sections, project and gasket done by specialized firms. You only pay for all the work. This means that you must carefully prepare a list of possible equipment requiring connection to 380 V. This minimizes your costs in the future.

# Advice 2: How to connect 380 volts

The electrical system of a modern home or an industrial building is properly designed, built and installed the system devices of the highest quality. Correctly designed and installed wiring to ensure reliable operation of household electrical appliances and personal safety.
You will need
• a screwdriver, a knife, a phase tester, pliers, ring spanners 14 and 17 (you can use carob 14х17), a warning sign "do Not switch! Work on the line, if necessary tips for finishing multi-strand wires.
Instruction
1
Before you start, you need to de-energize the switchboard in which they will be working. On the switch, post a warning poster. To check the absence of voltage use the display with a screwdriver. Just touch the tip of the screwdriver all contacts and the index finger need to touch the contact on the handle.
2
After we verify the absence of voltage taken for training the plug-in cable. To do this, with a knife carefully remove the top insulation of the cable by a distance that will allow you to easily manipulate the cable shield when connecting. The next step will prepare the cable wires. The same knife remove the insulation from the wires. pliers (pliers) are preparing contacts (the ends of the wires vygeboom as circles). Key Unscrew the clips in the panel and connect our cable. When connecting you should pay attention that the cable is three wires one section, and the fourth less. It is used as the zero and is connected primarily to the zero bus. When connecting the cable, the stranded wire which is used tips for making contacts.
3
If the load is connected at the other end of the cable using a phase tester, which determine the direct sequence of phases (ABC). Upon completion of installation, the robot removed a warning poster and connect 380 V.
Note
In conclusion, don't be too arrogant! If you are unsure or in doubt, better call a technician because the electricity does not forgive mistakes.