Connect an RCD for a washing machine

What should be the differential current of the RCD of 10 mA or 30 mA?

Greetings all readers of the site “Electric in the house”. For home use, the devices of protective shutdown with differential current of 10 mA and 30 mA are popular. Today we’ll talk about what current of 10 mA or 30 mA leaks in the apartment, as well as where and in which rooms it is preferable to establish protection with one or another charter.

RCD has much in common with a conventional circuit breaker. But, despite the similarity, the RCD is intended a little for other purposes. The RCD prevents the occurrence of fires associated with a malfunction of the electrical wiring, another important factor in its work is to prevent human electric shock.

Many doubt the advisability of installing an RCO. Let’s just say: there should be no doubt, it is a really necessary and useful device, thanks to which you can win more than to lose, especially when you consider that your own life is at stake.

Pay attention to the device. Some have difficulty in terminology. This applies to such concepts as “differential current” and “nominal current”. The leakage current is called differential current, it interests us first of all. This parameter I∆n is indicated (the size of the setting). So what is the current of the RCD of 10 mA or 30 mA in the apartment?

RCDs with differential currents for 10 mAs are installed in wet zones (bathrooms, showers, saunas), as well as on a separate fishing line for a trimmer for connecting one consumer (washing or dishwasher, water heater, warm floor, etc.P.)

RCD. connection, purpose, choice and principle of operation based on the above, we can conclude that existing protection measures and without an RCD reliably protect a person from electric shock. Ask, I’m in touch!

RCD for a washing machine: principle of operation, installation rules

According to the standards, the protective shutdown device is required to work from 0.5 to 1 leakage current for which it is designed. Roughly speaking, the mechanism works, starting from half of the work current declared by the device. If the device is 30 mA, then it will work with a leak from 0.015 to 0.03 amperes (from 15 to 30 milliamps).

Why are we considering the current of shutdown of the RCD in precisely 30 milliamps? Yes, because there is such a parameter as a “non-traffic current”. In other words, the current of non.traffic is a current in which a person will not be able to tear himself away from the wire without outside help. And 30 mA. this is a current of non.traffic.

Accordingly, in order to protect a person from electric shock, it is necessary to set an RCD designed for a circuit breaker rating of 10. 30 milliamps (not more than 30 mA).

Where to look for a parameter indicating the leakage current? See the body of the protective device, find the designation I∆n. This is the disconnection current rating, it will immediately become clear there: the TC of the RCD is 10 mA or 30 mA.

We also give a list of consumers for which an RCD with a setting of 10 mA is used:

  • one. Lighting and sockets on balconies or loggias
  • 2. Warm floor in the toilet, bathroom, shower
  • 3. Lighting in the bathroom
  • four. Sanctics in the bathroom, toilet
  • 5. Dishwashers
  • 6. Washing machines

Sometimes there is a practice of installing double differential protection. In other words, this is when one device, such as a warm floor, is connected to an RCD of 16/10 mA, and this RCD is connected to an RCD of 40/30 mA.

Why is it a little uncomfortable? Because it will always be unknown which device will work: most often the group RCD will work, turning off the rest of the consumers. You need to understand that the current of the RCD of 10 mA or 30 mA is different devices with different tasks. And only on you depends.

Many “sofas specialists” are skeptical of devices with a leak of 10 mA, motivating this that the setting is very small and the RCD will be falsely hard to work and constantly turn off for no reason.

Most importantly: if the installation of the wiring is completed high quality, all standards are met, then the RCD will never work.

It is naive to believe that the RCDs were invented only to protect a person from a shock blow. There are an RCD with a face value of 100, 300, 500 mA. They are called fire. From the name it becomes clear what is about, so we will not dwell on this issue in detail.

RCD for a washing machine: principle of operation, installation rules |

Let’s start with the installation methods and the procedure for connecting conductors. Everything is very simple, there are no special difficulties. In most cases, it is mounted on a dinreik. There are special ledges for this that hold the device in place.

Electric connection

Difavtomat connection diagram is usually on the case

In some rulers, you can connect a fishing line for a trimmer in the upper and lower nests. An example of such a device in the photo above (left). In this case, the scheme is written numbering through the fraction. 1/2 above and 2/1 below, 3/4 at the top and 4/3 below. This means that it does not matter from above or below connecting a fishing line for a trimmer.

Connecting a difavtomat on a camshaft

Before connecting the line from the wires, the isolation is removed at a distance of 8-10 mm from the edge. On the desired terminal, the fastener is slightly weakened, the conductor is inserted, the screw is tightened with a fairly great effort. Then the wire is twitched several times to make sure that the contact is normal.

Checking performance

If when pressing the “T” button, the difavtomat worked, it is efficient

Further check. connecting a simple load to each outlet. By this, you will check the correctness of the outlet groups. And the latter is the alternate inclusion of household appliances, on which separate power lines have been instituted.

How to choose a machine for a washing machine?

There are situations when, when the washing machine is turned on, protection is triggered, which leads to disconnecting all electrical appliances in the house. There may be several reasons for this: (see. also: what to do if the machine is knocked out when the washing machine is turned on)

  • When included in the wiring, there really was a jump in the voltage or leakage of the current;
  • Improper installation of a protective device;
  • The difavtomat that is not suitable for the parameters of the mains is installed, therefore, when turned on, the defense is false operation;
  • The network wire of the washing machine is closed;
  • A control unit, a heating element or a washing machine engine failed;
  • Malfunction of the protective device itself.

Competent choice and proper installation of an RCD or difavtomat for a washing machine, will help maintain the performance of the washing machine, protect it from current changes and current leakage, but also protect the house from fires, and family members from current damage. It is better to take care of protection in advance than then eliminate the consequences of the malfunctions of the mains.

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For lines with a group of outlets and outdoor lighting, difavtomats with a leakage current of 30 mA are put, on the lighting line inside the house they are not usually put. to save money.

Category B. If the current is exceeded by 3-5 times, C when the face value exceeds 5-10 times, the type D is disconnected at loads that exceed the value by 10-20 times. If you do not understand something, write to me!

How to choose a machine for a washing machine?

As it turned out, the usual RCD for the washing machine is not able to protect against all risks. It is better to put a difavtomat. a device that is within the power of this task. Which device to put and how to choose it correctly? After all, this is a fairly new device in the electrical appliances market. To competently select and put a suitable difavtomat, you need to know and take into account several mandatory characteristics:

  • Power. As with the purchase of any protection device, the difavtomat is selected in accordance with the power of the network (single.phase and three.phase);
  • Rated voltage. Characteristic showing the range of operating voltages of the network. In a single.phase network, it is 220 V, in three.phase. 380 V;
  • Automato face value and producer features. For household electrical networks, experts recommend choosing an automatic machine with a characteristic denoting the Latin letter “C”. As for the digital designation, for the outlet network, as a rule, the difavtomat C16 is selected, less often C25;
  • Features of the RCD. The most effective difavtomat with a RCD for a washing machine is considered class A. Simplified, class class, for such a consumer is not always suitable.
  • Additional protection. If the difavtomat is not equipped with a special protection against a cliff of the zero conductor, then when one of the conductors fails, the RCD often does not work on a current leakage.
  • Nominal current. Experienced experts advise to put protection at 0.03 amperes. Of course, a device designed for 0.01 ampers is more reliable, but its price category is higher. For household networks, in fact, such protection is not required.

The principle of operation of the machine

Before you start using expensive household appliances, it is necessary to decide which method to protect it will be the most effective.

The standard protective shutdown device consists of:

  • plastic case;
  • current transformer;
  • electromagnetic relay;
  • current release;
  • mechanism producing self.testing;
  • In new devices, there are additionally electromagnetic cuts.

With the normal condition of the network, the relay does not work, but if an increased load is on the wiring, the installed machine forcibly de.energizes the circuit, tearing it.

This situation may arise when the voltage jump occurred on the network, a person touched the bare wire, water will fall into the wiring. In the case when a protective machine is triggered, there is no need to replace it. Unlike fuses, this device is designed for repeated use.

The maximum protection of the washing machine will provide a modern device. a difavtomat that combines a standard RCD and automatic. In addition to the fact that this device provides the entire range of necessary protection, it also saves place in the distribution shield.

In the standard design, the device has a case of plastic material, transformer, relay, release, self.testing mechanism. New devices as an addition are equipped with electromagnetic cut off.

A similar situation is possible with voltage jumps, moisture enters the bare wires. When the protection is triggered, there is no need to change it. The main difference between the RCD for the washing machine is that it is intended for repeated use.

What RCD is needed for a washing machine

As already noted, protective shutdown devices are almost always used together with the circuit breaker. This feature must be taken into account when resolving the question of which RCD to put on a washing machine. The main criterion for choosing, the rated current of the operation is considered.

In both devices, these values ​​are closely interconnected. For example, if the machine gun has 16A, then the RCD installed after it should have a parameter a step higher, that is, 25A. This precaution allows you to protect the protective device from exposure to large currents, the values ​​of which are close to the operation of the circuit breaker.

For washing machines will be preferable to RCD A, responding to alternating and constant currents. The fact is that in modern household appliances, including washing machines, power supplies are installed, which include electronic semiconductor elements. As a result, in the power supply, the sinusoid alternating current is converted into a pulse half.period. If the leak occurs in this place, then the simpler device of the speakers on it simply will not react and will not work.

The leakage current parameters are selected standardly, in two versions. 10 or 30 mA. When choosing, you need to take into account the length of the supply line, the place of installation of the RCD, the humidity of the room, the condition of the insulation of the wires and other factors. It is undesirable to install an RCD for 10 mA, since it is most sensitive and can cause frequent false works.

What other protection options are there?

The RCD is installed in order to protect a person from electric shock, but they do not protect the electric circuit from all possible risks. To prevent breakdown of equipment, the automatic machine is included sequentially from the RCD: it is designed to protect the electrical cops from short circuit and voltage jumps.

washing machine motor

How much amperes the protective automation should be calculated? Experts note the following pattern: when installing the device for 16 A, the RCD for the washing machine set behind it should be designed for a larger current, for example 25 A. You can provide protection in two ways:

Washing machine connection diagram to the power supply system

For a washing machine, it will be better to conduct wiring, which is fed directly from the electric distribution panel. The RCD is installed in a place convenient for use, but better outside the bathroom. The outlet connects to the mains only after the protective shutdown device.

connect, washing, machine

What can not be done when connecting a washing machine:

  • Close the body of the washing machine with metal tap pipes or a heating system (in other words, you can not get caught);
  • Cut the grounding and zero contacts in the outlet. this will lead to the operation of the RCD.

The reasons for the operation of the RCD

It knocks an RCD when the washing machine is turned on, but still sometimes this happens. And in this case, do not immediately call the master. For starters, it is worth it to try to establish the reason for the operation of the protective apparatus on your own, and then decide what to do next.

There are a large number of reasons why the RCD works, the most common of them will be given below:

  • The device of protective shutdown is not correctly selected. If the RCD was selected without taking into account the characteristics of the washing machine, and its energy intensity is lower than the necessary, then it will instantly turn off, perceiving the inclusion of more powerful equipment as overloading the network;
  • Problems with electrical wiring. The old or not suitable power wiring may not withstand the load, which can also lead to the operation of the machine (in this situation, the RCD protects the old or weak wiring from fire);
  • Electricity leak on the technique housing. In this situation, if the zero wire is closed with the body and additional grounding is created, the protective device is automatically shut off;
  • A malfunction of the heating element, electric motor or network filter, closing contacts and buttons can also lead to the operation of the RCD. In this situation, in the absence of knowledge in the field of electrics, it is better to contact specialists.

Rules for choosing an RCD

The most frequently asked question when installing and connecting washing machines: is it necessary to install an RCD for a washing machine? The answer is simple. yes, you need. After all, the washing machine, in itself, is enough energy.consuming device, and also works in an environment with high humidity, due to which it belongs to the category of increased danger. That is why the installation of an RCD is necessary when connecting to the power supply network of washing machines.

So that the washing machine serves for more than one year, and its operation was safe, it is important to choose the right device for a protective shutdown. To do this, you must be guided by the following rules:

  • The power of the device. The choice of RCD for a washing machine in power is based on the rated power of the mains. There are single.phase and three.phase devices.
  • Network voltage. Single.phase RCDs are designed for 220 V, and three.phase. 380 V.
  • Current strength. The most common RCDs recommend by experts have protection for 30 mA. You can install 10 mA, but for household electrical equipment a similar degree of protection is not required.
  • Features of the design of the RCD. Since the washing machine has a high level of electrical consumption, it is better to choose a protective shutdown device of class A. It is also possible to install an AC class, but this type does not always qualitatively perform its function.
  • A feature of the release and marking of the machine. For a power grid in an apartment or a private house, an RCD is suitable with the marking “C”. There are also devices with digital marking, in this case the choice of the device with the marker C16 or, more rare, C25 will be correct.
  • Additional protection levels. In some models of the RCD, there is no protection system when cutting a zero conductor, which leads to ignoring the current leakage device.

Washing machine trips electric fuse board, Breaker or RCD

How is the RCD Automatic?

The well.being of household appliances in our dwellings often depends on worn electrical substations that are not designed for heavy loads. One voltage jump is enough to lose all devices powered by electric networks in one fell swoop. To save the washing equipment from the vagaries of electric networks, it is provided with a separate RCD. It consists of:

  • hulls;
  • transformer;
  • chain rupture mechanism;
  • self.diagnosis mechanism;
  • electromagnetic it is in the models of the latest generation.

The operation occurs during critical loads, the machine, opening the circuit, stops the passage of electric current. a person and a technique in safety.

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A dangerous situation will occur, for example, if a person touches the bare wires or when water enters him. Automation, having worked, prevents electricity damage and breakdown of expensive equipment. The sensor can work many times, and it is not necessary to change it, unlike fuses.

Requirements for sockets

To connect washing machines to the network, sockets with grounding contact are used (they are also called euro.zoom). It is better to use a socket with ceramic reinforcement.

Important. The use of extension cords, tees and adapters in an electrocope is undesirable, as it can lead to short circuit in case of weak contact, overload or water getting.

If the outlet is installed in the bathroom, then a special device with a high protection class is chosen, designed for use in conditions of strong humidity.

Grounding the washing machine

Let’s start with the installation of the ground circuit. To do this, on the street near the wall of the house or in the basement, 3 segments of a galvanized pipe at least 50 cm are clogged into the ground. Steel stripes or corners 50 cm or more are welded to them. It is advisable to place the pipes in the tops of the triangle, but it is permissible to be placed on one straight line if the place does not allow. The wire is screwed to the pipe, which is extended to the apartment and dried in the shield. To connect the washing machine to the network, the socket of the European standard is installed, which is connected to a separate difavtomat in the shield. It is chosen based on the calculated current consumed by the washing machine. The following is an example of the calculation, which allows to evaluate the value of this current. It is determined from the nominal electrical power of the consumer, the value of which is indicated in the instructions for the operation in the section of the technical characteristics. The power taken in watts must be divided into network voltage (220 V). 20% are added to the resulting value and the average current is obtained. After that, you can choose a protective device with a shutdown current equal or slightly more than the calculated.

The power of most modern washing machines varies from 2 to 2.5 kW. These data are indicated for the documentation for the device. Knowing power, determine the necessary cross section of the supply wires.

Attention. To power the washing machine, a copper three.core cable is laid (phase, zero, earth).

Most often, in apartments for the washing machine of the machine, the section of the wire of 2.5 kV is used. m. In addition to the washing machine, this section will allow you to connect a hairdryer, electric browing and other small equipment to the same outlet. Accordingly, to protect this outlet line, a circuit breaker with a nominal current 16 (A), a characteristic C and RCD by 25 (A), 30 (MA) are used to protect this outlet line.

How to install a new Washing Machine in 7 Simple Steps


Before laying the cable, the location of the outlet is determined. In this case, take into account the height of its placement and removal from the distribution shield.

Having decided on the cable laying route, it is marked on the wall with a marker, as well as a place for a socket. In the wall, the channel and a hole for the outlet are stroke, removing the reinforcement along the way with an angular grinder. After that, the electric cable is pulled from the shield to the outlet.

RCD for a washing machine: principle of operation, installation rules |

The use of powerful household electrical devices, on the recommendation of manufacturers, requires the installation of reliable network protection. The accompanying documentation of large household appliances, as a rule, contains specific information about devices, the installation of which is necessary in the household network to ensure safety.

In fact, one cannot draw up a specific scheme that will be universal, It is necessary to take into account the entire load on the network and make an uniform distribution of all elements (switches, equipment, sockets). Sometimes it is better to install a separate RCD for a specific outlet used to power energy.intensive technology.

But, nevertheless, the connection of the RCD to a single.phase network can be reduced to several most popular options that may serve as the basis.

Scheme 1. Installation of a general RCD

An incoming power fishing line for a trimmer is considered the ideal location of the RCD of an apartment or house. First, they have a two.pole machine gun, then an RCD, and after a set of machine guns for each individual electrolyte or electrical appliances.

Suppose that there was a touch of a phase wire to the device included in the network with a metal case, as a result of which a current leak occurred. RCD work and shutting off the voltage on all lines. Establishing the reason for the disconnection in this case, with such a switching scheme, will be quite problematic. And this is a minus.

But such a connection of an RCD is economically profitable, you need to buy just one protective device. In addition, there will be little space in the electrical panel, which means that the shield itself will not need very large.

The device keeping records of the used electricity in this version of switching is better to place between the automaton and the RCD.

On a note! If it is necessary to block the supply of electricity to housing, it is recommended to turn off the general machine, and not the protective device, although they are usually located nearby, and they look very similar.

Scheme 2. installation of general and group RCDs

In fact, the principle of operation of the RCD in a single.phase network according to this scheme does not differ from the previous two. Everything is reduced to additional installation, in addition to the main RCD, protective devices in front of each working circuit, t.e. control of any possible current leakage will be duplicated. The safety of this option is undeniable.

However, when installing such double protection, selectivity is required to observe, t.e. take into account the normative indicators of current strength at the general and private RCD and the time of their work. Protection on the contours should be more sensitive and fast. This is necessary to exclude the simultaneous triggment of both devices.

The main advantage of the scheme is the disconnection of a separate circuit, on the site of which there was an emergency situation. The disconnection of the entire network is not excluded, but this happens in rare cases and only if the local RCD:

Installation and connection

Put a protective machine on your own is not difficult. You can place it in an electrical panel. If the space is not enough there, then the installation is performed near the washing machine, near the outlet. Only a moisture.resistant socket should be used to connect.

  • If you connect through the shield, then stretch the VVG wire to the washing room. 3×2.5 mm in size.
  • Take the indicator to find out where the phase is and where zero is. The approximate connection scheme is below. Connect these wires to a difavtomat.
  • After the conclusions of these wires, connect to the outlet or extension cord with the RCD.

That’s all. You installed a separate machine for washing machine. If you want to connect more equipment, the circuit will become more complicated, since for each device you need to install a separate RCD.

We talked more about how to connect a washing machine to a network without grounding in previous articles.

How to install and connect a washing machine | Washing machines | Blog | The DNS club in accordance with the PUE bathroom is classified as a wet room in which special requirements for electrical wiring are presented. Ask, I’m in touch!

Why extension cords are prohibited?

A power of more than 2 kW is transmitted through the supply wires. Therefore, all opening connections must provide perfect contact. This allows euro.zones with a large area of ​​contacting contacts. But without losses, it does not do it, and the extension cords only increase them. The consequence of losses. heating. Extension cords often include in ordinary outlets. with the help of adapters, losses grow even more. Due to the constant heating, the contacts are burned-forks and sockets deteriorate. As a result, a fire occurs.

Do I need to put grounding?

In modern washing, the case has a potential, half the network potential. 110 in. Thanks to the grounding wire, this potential flows to the ground. Why is it done? The point is the features of network filters that overwhelm the electrical mechanes produced by a washing room during operation. The body of the device is connected to the power grid not directly, but through the filters.

Grounding allows you to protect a person from an electric shock if the insulation damage occurs. If there is no grounding, a person, touching the body, feels tingling, and sometimes more serious blows. In a wet room, a washing machine can apply a serious electrical injury. up to a fatal outcome.

By installing a difavtomat on the washing machine, you solve two problems at once-exclude a breakdown of equipment due to problems in the mains and protect its users from electric shock.

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