RCD for a water heater: how to choose and why it works
Installation of a boiler operating on electricity should be done using protective shutdown tools. The presence of such devices avoids human lesion and ignition of the wiring.
But there are many models for a water heater with various characteristics. You need to choose a defense device correctly, without confusing it with other automatic machines and switches.
We will tell you how the RCD works, what are the differences in the protective device from the difavtomat, explain, and also explain what parameters must be taken into account when choosing a differential switch. In addition, we prepared a detailed diagram of connecting the RCD to the boiler and designated the likely errors of installation.
The power of the electric oven and the hob
The first and most important thing that you need to learn for the competent production of these work is the power of connected devices.
The power of the electric oven and the hob is associated with the selected mode of operation of the device and the number of involved captures. But to calculate the electrical circuit of the connection and subsequent safe operation, we need to know only the maximum capacity of the oven and the stove, which is measured in watts (W) or kilowatts (kW).
The maximum power of electrical appliances is always indicated on the device itself, on its packaging and in the operating instructions. So for the oven, depending on its type, model and the presence of additional functions, the maximum power varies from 2.5 kW to 4 kW, for the hob, this value can take from 6 kW to 9 kW.
For which electrical appliances it is necessary to put an automatic and difavtomat
According to PUE standards, the circuit breaker must protect all the weak and often loaded areas of the chain. There are no single approved list of household appliances connected through protective machines, but as a rule they are placed:
To protect power lines of powerful household appliances, including washing and dishwasher, hob and oven, boiler, air conditioning and refrigerator.
When connecting cable floor heating, facade lighting, alarm, electric heating boilers, outlet and lighting groups.
On the allocated fishing line for a powerful power supply of powerful three.Phase equipment (hobs, pumping stations, boilers)
Modern standards involve the installation of individual protective devices for each electrical circuit in addition to an introductory machine.
Fitting an RCBO in a Consumer Unit
It should be remembered that conventional circuit breakers do not protect a person from current damage during breakdowns in the case or other reasons for its leakage.
With high risks of aging or damage to insulation, characteristic of rooms with high humidity and powerful equipment with heating plants, an RCD (combined with standard automatic circuit breakers) or compact dipavtomats are introduced into the circuit, combining both functions.
When choosing the latter, in addition to the rating and the number of poles, the value of the leakage current (MA) is selected, when the circuit is achieved, the circuit is opened in order to protect a person from lesions of currents. In residential buildings and apartments, it is 30 ma in dry premises and 10. In wet. At the same time, the load is connected to the difavtomats exclusively within the same group of devices, without combining zero conductors.
Automatic switch, DIF automatic or RCD on the hock panel of the electric stove. What to put and how
It is not enough to choose a functional, comfortable and beautiful electric stove. It still needs to be correctly connected and secured from a possible short circuit, overload or leakage currents because modern plates, providing opportunities for culinary experiments and helping us feel like Jamie Oliver and Alena Ducasses at the same time, have become quite powerful devices comparable to industrial equipment.
And require a careful approach to safe connection and use. We will tell you what simple and affordable methods you need to protect the hob from possible problems with electricity.
What will your electrician say
The tips of a professional electrician, if you turn to him for advice, will rotate around the following concepts: “automatic”, “Dif”, “RCD”. If you do not have special knowledge about devices for protecting electrical household appliances, this may cause some confusion.
If you trust the master, but you still want to delve into the problem and its solution, let’s deal with the methods of protecting the electric stove “on the fingers”.
Separate electrolyte for a new slab
To begin with, to connect a modern hob with their average capacities of 6-10 kW, you will have to conduct a separate power cable directly from the electrical panel. Another separate for an electric oven. Over, this should be a copper cable with a cross section of at least 4 kV. Mm. The brand can be a PVS, but most often use VVG.
It is recommended to equip a fishing line for a trimmer to connect the slab with a circuit breaker. This is an important and desired device that will immediately turn off the nutrition of the hob in case of dangers such as a short circuit or unacceptable network overload. It is placed by an electrician in a tenant shield. Only you need to correctly determine the value of the rated current.
How to choose a “automatic” for the hob
The circuit breaker rating is calculated simply. Suppose your electric stove has the maximum connection power of 6 kW (you will learn this digit from the technical documentation for the device).
You need to find out its maximum consumption current. Divide the power into the voltage network:
Choose a circuit breaker, we need that face value that is closest to the number received. Some stores of electrical goods facilitate the task of an inexperienced buyer: for example, in the online catalog of the Axiom Plus store in the “Automatic circuit breakers” the filter on the main characteristics, including the rated current.
See: the closest to our number 32.7 and the face value 32 a. We put a checkmark on this field and receive offers exactly for our stove-worth from 40-45 UAH. European production Schneider Electric (France). From 67 UAH.
Which the circuit breaker cannot cope with
Put the machine on the stove the most reasonable idea. However, this does not provide complete safety. In household electric networks there is another potential threat that is not part of the area of the switch of the circuit breaker. These are differential currents that can lead to a human defeat with electricity or fire. Unfortunately, the machine will not save if you touch the exposed wire or household appliances with a breakdown.
Such risks prevent individual protection devices.
RCD against leakage currents
The most dangerous option is when differential current arising due to problems with the insulation of conductive parts passes through the human body. Protective shutdown devices (RCD) instantly de.Energize the network of the network on which are installed when such a leak is detected.
Therefore, even if you already have an automatic switch in the shield on the electric stove, it is better to put an RCD. Then, if a current leak occurs on the line, it will work, and if the super.Flows, the machine gun.
- Choose the value of the rated current by the step higher than for the machine. For the situation we are considering, this is at least 40 A;
- An important indicator. Sensitivity of the operation. Choose 30 mA for a hob, this is enough to protect a person. There are more highly sensitive at 10 mA, but they can be falsely hard to work, turning off the plate unnecessarily and interfering with cooking;
- By type, stop the choice on the RCD of marking “A”, which will even work for differential currents that occur inside the device.
For our example, in another section, we see that the cost of a suitable RCD for 40 A, 30 mA and type A will cost from 360 UAH., And European production from 410 UAH (model Schneider Electric EZ9R34240 EASY9, 2P, 30MA, 40A).
Devices “2 in 1”
To complete the picture, you still need to tell about the differential machine. This is a device that combines the protective functions of the circuit breaker and the RCD. The Dif body is more compact, which facilitates the installation in the electrical panel.
How to choose a difavtomat: choose a leakage current as for an RCD, and a nominal. As for a circuit breaker. In our case: 30 mA and 32 A. On this page we will filter up according to the specified parameters: it will cost from 250-300 UAH, and for Made In Europe for 478 UAH (Easy9 1P N, 32A EZ9D34632 SCHNEIDER ELECTRIC).
Compare the cost of options
Let’s see how much 2 alternatives will cost (on the example of the designated for the EASY9 series from Schneider Electric):
As you can see, the price is completely identical. For other manufacturers and series, the ratio can fluctuate in one direction or another, but approximately the costs are equal. Like the tasks of both options.Total: Choosing “by degree of readiness”
Your plate is correctly installed, filled with a separate cable and equipped with an automatic circuit breaker of the corresponding face value, but I also want to put protection against leakage currents?
The easiest way to purchase an RCD from the point of view of logic and installation. It connects to the shield immediately after the machine, sequentially in one fishing line for a trimmer with it.
If the house is only being repaired, and the filling for the electrical panel has not yet been bought, the choice is you and your master. You can install a separately circuit breaker and RCD, or by a universal protection device. A difavtomat.
What automatic to put on a hob and oven: what is it
To connect an automatic protective switch in an electrical panel, first the upper part of the switch is installed on the DIN-rack. Pull the eye with a screwdriver and press the lower part. The lower capture is released and snap in their place.
Then connect contacts. If, before that, multi.Core conductors, squeezed by tips were brought up, they will be made back to the upper and lower clamps and tighten the screws. If the vein was without a tip, it is better to remove and clean the old end, then make a fresh, non.Formed conductor with a screwdriver.
After connecting the wires, the voltage is supplied to the machine and check its operation. If everything is in order, connect electrical appliances and see that sparks, cod, heating and other undesirable effects do not appear on the contacts of the circuit breaker. Heating is checked with a pyrometer.
It is important to correctly choose the nominal values of protective machines, the diameter of copper cores and start the phases for the gap, and not the zero wire. In the operating position, the machines are installed by shifting up the switch buttons.
Protection of the hob.
Dear Pro, we understand the shield. Hon surface power 6600 watts, a separate cable to it VVG 34 (we can’t change at 36). It is planned an automatic machine C32 and RCD 32A30M. Your recommendations? What power the difavtomat can be delivered instead of an automaton and RCD? Thanks.
Masters online: 42 orders per week: 2 194 offers per day: 697
Personally, I have: UZO50. 30 Milamper.GOST. The power of the plate is 11 kW.
The wire will be warming can lead to a short circuit
If Dif is used! Then what then do you need an RCD)))))) shorter Dif 32, and try not to use the entire panel at once)))
We already just have a mania everywhere to put an RCD.
Good afternoon, Alla! Let’s start with the fact that 6.6 kW is full power, and only the true culinary fan includes the entire surface at a time and in full power, so there is nothing wrong with 4 kV cable.Mm no, that’s enough. I would not put an assault rifle on 32 amperes in any case, t.To. The machine is needed to protect the cable, the number 32a, written on its surface is only a face value, not a shutdown current. Therefore, put Dif.Automat 20A to increase the service life of the cable and prevent fires, the reason for this thermal and electromagnetic release.
I completely agree with the answer of Paul and Sergey, the only Dif for 25 A, 30 mA advised
6 kW holds a 3×4 cable, a 32 assault rifle is designed for 7 kW, a 25.Kw machine is designed for 5 kW, respectively, if you turn on the hob to the full, there will be problems, if you don’t, everything will be fine. In general, for reference. In most panel houses of the times of the USSR there was a 4. 6 mm aluminum cable, t.E. This is similarly 2.5. 4 mm copper, and many when buying a new headset with built.In equipment, they connect the hob to this cable and use. Of course, some people later have problems with this cable, but I think that these cases are not very many as a percentage of the total number of people who thus connect the hob. So you decide. If you want to get 99.9% of the guarantee that everything will be ok. Do everything right and by the mind, if you want to reduce this percentage, you can put an automatic. How so!
Hello! The copper conductor with a section of 4 mm2 corresponds to a power of 7 kW or 32 A (with single.Phase connection). Why change at 6mm2, I don’t understand! In addition, in any hob, all heating elements are never included at the same time, possibly only at the time of warming up, and then I’m not sure, we must try very hard to achieve this. It is necessary to put DIF 32A/30MA, for example Legrand 411005, or ABV series F202.
Recommended the Legrand or ABB difavtomat, in ABB series DSHMA!!
You want to say that Dif 32a/30ma in the DSH941 series?
��Как правильно подключить варочную индукционную панель,схемы, выбор кабеля, розетки, автоматов
Corresponding to the capacity of the cable and the previous machine
Automatic switch, DIF automatic or RCD on the hock panel of the electric stove. What to put and how
It is not enough to choose a functional, comfortable and beautiful electric stove. It still needs to be correctly connected and secured from a possible short circuit, overload or leakage currents because modern plates, providing opportunities for culinary experiments and helping us feel like Jamie Oliver and Alena Ducasses at the same time, have become quite powerful devices comparable to industrial equipment.
And require a careful approach to safe connection and use. We will tell you what simple and affordable methods you need to protect the hob from possible problems with electricity.
What will your electrician say
The tips of a professional electrician, if you turn to him for advice, will rotate around the following concepts: “automatic”, “Dif”, “RCD”. If you do not have special knowledge about devices for protecting electrical household appliances, this may cause some confusion.
If you trust the master, but you still want to delve into the problem and its solution, let’s deal with the methods of protecting the electric stove “on the fingers”.
Separate electrolyte for a new slab
To begin with, to connect a modern hob with their average capacities of 6-10 kW, you will have to conduct a separate power cable directly from the electrical panel. Another separate for an electric oven. Over, this should be a copper cable with a cross section of at least 4 kV. Mm. The brand can be a PVS, but most often use VVG.
It is recommended to equip a fishing line for a trimmer to connect the slab with a circuit breaker. This is an important and desired device that will immediately turn off the nutrition of the hob in case of dangers such as a short circuit or unacceptable network overload. It is placed by an electrician in a tenant shield. Only you need to correctly determine the value of the rated current.
How to choose a “automatic” for the hob
The circuit breaker rating is calculated simply. Suppose your electric stove has the maximum connection power of 6 kW (you will learn this digit from the technical documentation for the device).
You need to find out its maximum consumption current. Divide the power into the voltage network:
Choose a circuit breaker, we need that face value that is closest to the number received. Some stores of electrical goods facilitate the task of an inexperienced buyer: for example, in the online catalog of the Axiom Plus store in the “Automatic circuit breakers” the filter on the main characteristics, including the rated current.
See: the closest to our number 32.7 and the face value 32 a. We put a checkmark on this field and receive offers exactly for our stove-worth from 40-45 UAH. European production Schneider Electric (France). From 67 UAH.
Which the circuit breaker cannot cope with
Put the machine on the stove the most reasonable idea. However, this does not provide complete safety. In household electric networks there is another potential threat that is not part of the area of the switch of the circuit breaker. These are differential currents that can lead to a human defeat with electricity or fire. Unfortunately, the machine will not save if you touch the exposed wire or household appliances with a breakdown.
Such risks prevent individual protection devices.
RCD against leakage currents
The most dangerous option is when differential current arising due to problems with the insulation of conductive parts passes through the human body. Protective shutdown devices (RCD) instantly de.Energize the network of the network on which are installed when such a leak is detected.
Therefore, even if you already have an automatic switch in the shield on the electric stove, it is better to put an RCD. Then, if a current leak occurs on the line, it will work, and if the super.Flows, the machine gun.
- Choose the value of the rated current by the step higher than for the machine. For the situation we are considering, this is at least 40 A;
- An important indicator. Sensitivity of the operation. Choose 30 mA for a hob, this is enough to protect a person. There are more highly sensitive at 10 mA, but they can be falsely hard to work, turning off the plate unnecessarily and interfering with cooking;
- By type, stop the choice on the RCD of marking “A”, which will even work for differential currents that occur inside the device.
For our example, in another section, we see that the cost of a suitable RCD for 40 A, 30 mA and type A will cost from 360 UAH., And European production from 410 UAH (model Schneider Electric EZ9R34240 EASY9, 2P, 30MA, 40A).
Devices “2 in 1”
To complete the picture, you still need to tell about the differential machine. This is a device that combines the protective functions of the circuit breaker and the RCD. The Dif body is more compact, which facilitates the installation in the electrical panel.
How to choose a difavtomat: choose a leakage current as for an RCD, and a nominal. As for a circuit breaker. In our case: 30 mA and 32 A. On this page we will filter up according to the specified parameters: it will cost from 250-300 UAH, and for Made In Europe for 478 UAH (Easy9 1P N, 32A EZ9D34632 SCHNEIDER ELECTRIC).
Compare the cost of options
Let’s see how much 2 alternatives will cost (on the example of the designated for the EASY9 series from Schneider Electric):
As you can see, the price is completely identical. For other manufacturers and series, the ratio can fluctuate in one direction or another, but approximately the costs are equal. Like the tasks of both options.Total: Choosing “by degree of readiness”
Your plate is correctly installed, filled with a separate cable and equipped with an automatic circuit breaker of the corresponding face value, but I also want to put protection against leakage currents?
The easiest way to purchase an RCD from the point of view of logic and installation. It connects to the shield immediately after the machine, sequentially in one fishing line for a trimmer with it.
If the house is only being repaired, and the filling for the electrical panel has not yet been bought, the choice is you and your master. You can install a separately circuit breaker and RCD, or by a universal protection device. A difavtomat.
What machine is needed for a dishwasher?
Poems of protection of the protection and RCDs for connecting the dishwasher are considered depending on the current consumed, but in most cases there are two options: a protective machine for 16 A and RCD with a leakage current of 10 mA. In this case, the cross section of the cable cores should be 2.5 mm².
In addition to an automatic protective switch on the oven, it is recommended to install an RCD. The machine protects the fishing line for a trimmer from overheating and from short.Circuit currents. At the same time, he is not able to protect against breakdown to the case, and this is a real danger.
