Bezopasnost requires attention

How earth electrodevices?

Metal cases of electroinstallations and devices (washing machines, electrowater heaters, conditioners etc.) should be necessarily earthed by connection with a zero wire of the electric system. Use of metal pipes and other details of a waterpipe, heating or a drainage system for grounding (zanuleniya) is forbidden.

How correctly to make grounding?

In the socket it is necessary to connect a crosspiece to the "earthen" plug from a "zero"wire. To make all it it is necessary competently not to mix "zero" and "phase". The error can lead to that all electrodevices which you tried to secure will burn down.

Whether there is a universal method of grounding?

In this case do repeated zanulenie. Conduct one more wire from the socket to a switchboard in a corridor and attach it to the board case. Sometimes electricians name this wire «pure zero».

In new buildings this «the pure zero» is made to each socket and used as grounding. In older houses — constructions 10-15 summer prescription — with electric stoves, it though enters into apartment, but is connected only to one socket on kitchen.

How to supply an electrosecurity?

The optimum system for protection against transhipment and short circuit currents is the modern thermomagnetic automatic switch. Such switch continuously measures a current in system and if the current exceeds certain significances, automatically interrupts its giving. The switch should possess proper disconnecting ability above a settlement current of short circuit in a chain in which it is built in.

What for the system of protective switching-off (UZO) is necessary?

It reacts to «a leak current» and during the 100-th shares of second disconnects an electricity, protecting us from defeat by an electric current.

Originally UZO it has been invented for protection against a fire. The wires laid, for example, for falshpotolkom, are covered in due course with a dust. Isolation infringement conducts to their heating, iskreniyu and, as consequence of these negative processes, — to dust ignition. Thus, UZO unites two functions of protection:
  • Thermomagnetic at short circuits;
  • At current leak on the earth.

UZO — the differential automatic machine which catches the slightest leak of a current and disconnects contacts.

UZO happen two kinds:
  • Electronic, dependent on pressure of a food;
  • Electromechanical, independent of pressure of a food.

Last — is more expensive, but have bolshey sensitivity.

How to repair electroadjusting systems?

To repair switches, sockets and other electroadjusting systems does not follow. It is just necessary to replace them new. If will scorch or the wire will break off at input in an electrical household appliance or the fixture the wire can or be truncated (having thrown out the damaged plot), or to replace new. Purchasing this or that wire, it is necessary to explain in detail to the seller for what it will be intended. For example, for a food of heating devices cords with nagrevostoykoy isolation are necessary, and to you can offer a standard variant.

What malfunctions can occur in electroadjusting systems?

Characteristic malfunction of switches is mechanical jamming ryichazhka or keys. At switch survey the broken off contact springs, the burnt slightly contact plates, the broken off plastic details, cracks in the bases and covers can be found out. As a rule, such switches are not subject to repair and are replaced with the new.

In sockets the springs compressing contact nests therefore plug connection heats up in due course weaken, contacts are covered with a deposit and melted off. It is necessary to compress or replace springs and to supply contact at which pins of plug plugs are densely kept in socket nests. In the absence of spare szhimnyih springs, and also in the presence of cracks and having chopped off in the basis and a cover plug receptacles are subject to replacement.

Sometimes in one socket through a tee-splitter connect simultaneously some powerful electrodevices. Whether such load is dangerous to one socket?

It to do it is not recommended, as the big load on wires making to the socket leads to an overheat last and to fast drying of isolation. Source: the Newspaper "Building" #42 (2004) heading «Stroyinform»

It is introduced: on November, 27th, 2007

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