All about washing machines

The voltage on the housing of the washing machine

The voltage on the housing of the washing machineIn the process of using the washer, some housewives feel unpleasant tingling sensations when touching the equipment body. These are nothing but small electric shocks. Such an incident occurs when there is voltage on the washing machine body. We will figure out what to do in such a situation to reduce the likelihood of electric shock to the user.

Connection to a two-wire network

If your machine is connected to a two-wire power supply, then even with the equipment in good working order, voltage can go to the case. A prerequisite for this is a certain feature of the network filter, which is equipped with each washer. The network element is a pair of interconnected capacitors, one of which connects the "shell" of the machine and the phase, and the second - the housing and the zero cable.there is no grounding in a two-phase mains

Manufacturers of washing equipment usually produce equipment focused on connecting to a three-wire network having a separate protective conductor. In this situation, the surge protector will function to its full potential, perfectly coping with its task. So, the common cable takes on a potential of 110V, but at the same time the charge completely leaves the washing machine.

But in fact, such washing equipment, unknowingly, is often connected to a two-phase power network. In this case, a voltage of 110V is accumulated on the body of the machine. Using such a washer, you can easily feel an electric shock, which is usually short-term, but very painful.

For inclusion in a two-wire line, you should not buy washing equipment that was assembled in Europe, and was originally oriented to the European market, this is not entirely safe.

Worn out wiring

The bare power wiring inside the washer is far from uncommon. Experienced craftsmen have often had to deal with situations in which the insulation simply worn away over time due to constantly experiencing vibrations. Bare cables can be found in almost new cars, they can be bitten by mice or rats.

In this situation, the presence of a phase on the case is noted. At first, the voltage can be small, but subsequently it is easy to get a shock of 220 volts. Often, the machine is installed in the bathroom, and with high humidity, the chance of electric shock becomes even higher.

Exhausted wires are a serious problem that endangers the health and lives of users.

from vibration, wiring and chips get damaged and closeIf only an unpleasant sensation can be obtained from the not quite accurate operation of the line filter, then “tired” insulation can cause great harm to the user, therefore, the cause must be eliminated as soon as possible.

It is very important to build a potential equalization system in the bathroom. All equipment located here: pipes, a shower cabinet, a ventilation duct and the washing machine itself must be reliably connected to each other using an equalizing electrical connection.

However, equalization systems of potentials to ensure complete safety of family members are few. One chain still remains unprotected. We are talking about the system washer housing - the human body - the floor covering of the room. What to do in this case for more protection? There are 2 options:

  • turn on the residual current circuit breaker in the circuit;
  • ground the “body” of the machine.

RCD in a two-phase network will have a slightly different principle of operation. It will not work when the wire is broken. Protection is activated when the user touches the “shell” of the washing machine. The fact that the RCD is triggered only after touching the case is not entirely pleasant, but the likelihood of electric shock will be minimized.

Since the current strength will be minimal when touching the case, the residual current circuit breaker can be selected with a rating of up to 30mA. It is better for owners of houses and apartments with outdated two-wire electrics to purchase sockets immediately with built-in RCDs, so there will be much less problems with false activation of protection.

Ground the machine

Grounding household appliances is the most reliable option to protect yourself and your family from electric shock. In case of breakdowns in the supply wiring, the current will simply be redirected to the ground electrode and will be completely safe for humans.

With the organization of protective grounding, one can encounter various problems. Do not use water and sewer pipes as a grounding element. The rules also categorically prohibit connecting the neutral and working cables without the use of a device that evaluates grounding. So, if your house has a two-wire network, you will only have to hope that the access switchboard is grounded, otherwise, it will not be possible to secure the washing equipment.

To deal with the issue of grounding in your high-rise building, you must contact the organization serving the house: management company, HOA, center for calculating utility bills, etc.

If you own a private house, built on a land plot, the ground loop can be organized on your own. However, keep in mind that these works will require a lot of effort and time from you, but in the end you will receive a guarantee of complete safety for yourself and family members when using the washer.

The first step is to determine the place where the ground loop will be drawn. In the event of a power outage, the voltage will go to the ground pins, so the likelihood of a person being there should be reduced to zero. The presence of a living creature in the place of the discharge of electric current into the soil can lead to his death. It is very important to place the electric taps in an unvisited place. It is preferable to organize a grounding loop behind the house, not more than 1 meter from the foundation of the building.

Around the place of electricity drainage it is better to erect a small fence enclosing the danger zone.

Once the placement is selected, you can proceed to create the structure. The algorithm of actions will be as follows:

  • use a shovel to dig an equilateral triangle (each rib is about 1.2 meters long and has a furrow depth of 0.5 to 0.7 meters);
  • Dig a similar trench to the porch of the building;
  • take the prepared reinforcement and hammer into each vertex of the triangle a metal rod 2 meters into the ground, leaving only the upper ends. They will perform the function of electrodes;
  • fold metal corners having a thickness of 3.5 mm or more into a triangle. The corners of the figure should touch the electrodes. After the structure is folded together, proceed to welding the tops;
  • in a trench leading to the porch, lay a metal plate, one end of which should be welded to the top of the resulting triangle;
  • connect the ground wire to the plate with a bolt;
  • fill all the trenches with soil.

organization of grounding in a private house

It is important to pay attention to the soil quality of the site. If a sand cushion prevails in the area, it is necessary to increase the conductivity of the soil with saline. Special liquid should be poured into the base of the electrodes.

After all, you will need to measure the resistance of the resulting grounding in the house. For these purposes, it is best to use a special device, but its price is too high. What to do if there is no opportunity to purchase a multimeter?

It is possible to check the operability of the system with a simple lamp consuming at least 100 watts. Connect it with the first contact to the ground wire, and the second to the phase. A lamp burning with bright light will indicate the correct installation.If the lighting is dim, then the contact is weak and the joints of the structure should be redone. A completely unlit lamp indicates an error in the design, here you will have to completely revise the entire ground loop. What conclusions should be drawn from this material?

  1. If your home is equipped with three-wire wiring, and the machine punches into the housing, make sure the connection of the grounding circuit is intact. To do this, check the voltage between the washing machine and the phase contact with a tester;
  2. In the case when the apartment has a two-wire power supply network, try to make a separate grounding for the washer and arrange potential equalization;
  3. If it is not possible to create a separate grounding, equalize the potentials in the room where the washing equipment is installed, and turn on the residual current circuit breaker at least 30 mA.

If there is voltage on the housing of the washing machine, measures must be taken to eliminate it. Such a situation is extremely unsafe and can lead to electric shock to users of equipment.

   

Reader Comments

  • Share your opinion - leave a comment

Add a comment

Read also

Error codes for washing machines