How many phases do you need for an electric stove?
You can connect an electric stove to 2 phases, but I recommend, when you connect a 360 volt stove yourself, connect to all 3 phases, for less stress on the electrical box.
The electric stove itself is allowed to connect to both 220 and 380 volts. Do not even pay attention to the fact that you can connect to 220 volts, with such a connection stove will not work at all 100%, and the “eat” electricity will be more than 380 volts.
Regardless of whether the socket outlet will be installed for a cooker hob or an oven, it is the power socket that must be installed for them. There are quite a few varieties. each manufacturer can do the design at its discretion, while respecting the requirements of GOST or PUE. Its main difference from the household is the ability to work with currents of high power, which is reflected in the thickness of the conductive contacts.
The vast majority of electric stoves, hobs and ovens have external metal parts, which in adverse circumstances can be live. To protect people and equipment from electric shock in such cases, apply grounding, contacts which in conventional sockets are like clamping tendrils. The socket for the oven can not be equipped with such protection, as it is insufficient for high amperage currents. As a result, the socket grounding contact is made on the plug itself separate pin. Some people mistake the three-pin plug for a three-phase, but it’s really a phase, zero and ground.
Choice of power cable
According to the requirements of the ПУЭ, p.7.1.34 (and not just the PUE), residential wiring must only be copper. No aluminum cables are out of the question. There is an exception, but it certainly does not apply to apartments. The point is that it is allowed to lay aluminum cables in residential areas, but with a cross section of 16 kV.mm and above. You wouldn’t run a section like this in an apartment, would you? I hope everything is clear on this.
So, the power cable to the electric stove should only be copper.
Next, we need to decide on the power supply. If you have a single-phase power supply in your apartment or house, then the supply cable should only be three-core: phase L, ground N and PE.
If you have an old electrical installation, and even without grounding, then read very carefully the article on how to perform the division of the PEN conductor to N and PE, to switch from a TN-C grounding system to TN-C-S. There are all the answers, how to act in this case.
The same applies to those who have a three-phase power supply at home. Only in this case, the supply cable should be five-core: phase A, B, C, zero N and ground PE.
So, with the number of wires in the cable are defined.
What should be the cross-section of the cable? According to the Code of Rules SP 31-110-2003, paragraph (2) of the Code, the power supply must be connected to the mains.9.2 To power the stove from a single-phase 220 (V) network, the cross section of the supply cable must be at least 6 kV.mm.
This is a generalized value. In fact, the cross-section of the cable can vary both to the lesser and greater, depending on the power of the stove. For example, it is not advisable to power the electric stove with a capacity of 7 (kW) cable with such a margin. You can use a smaller value with the appropriate choice of nominal circuit breaker, such as VVG (3×4) or PVS (3×4), and on the fishing line for trimmer set automatic device 25 (A).
In the case of a three-phase network, the power cable to the electric stove must be five-core (phase A, B, C, zero N and ground PE) section of at least 2.5 kV.mm.
Why? Yes, because such a cable can supply three-phase loads up to 16.4 (kW), which is good enough for almost any electric stove.
Here is a table with the recommended cross sections of wires and cables to help you. You can also use the program electrician.So, knowing the power of the stove, you can accurately find the cross section of the cable.
Still have to choose a cable brand. To do this, I recommend you go to the link to a separate article, which lists the recommended brands of cables and wires, depending on the conditions of installation. Here is a piece of advice: Do not use stranded wire of PUNP brand.
I also suggest you to read useful:
And one more thing, the power line for the trimmer to the stove must be laid separately, and it is not allowed to combine it with socket lines or lighting lines. This is also clearly stated in SP 31-110-2003, p.9.2.
It is good, if the manufacturer has equipped their products with a power cable. To connect it will not be difficult, because it remains only to properly distribute the wires in the plug or on the terminal block, but often such a cable is missing, and it is necessary to purchase separately and connect it yourself.
Below we will consider how to connect the cable to the stove, working from a single-phase, two-phase and three-phase network.
In the case of the wire brand, the best solution would be PVS or KG. The first type stands for vinyl connection wire. This product has conductive copper conductors, each of which is protected by insulation and all of which are in a white jacket. Such a power wire can withstand voltages up to 450 V, and the insulation material does not burn, which allows the wire in question to be heat resistant.
It is also distinguished by its high strength and excellent bending resistance. It can even be used in unheated and humid buildings, where it will last 6-10 years, depending on the operating conditions. Excellent for connecting electric stoves.
If we talk about wire type KG, its name stands for flexible cable. Its sheath is made of a special type of rubber. In addition, the same jacket protects tinned cores made of copper. Between the wires is a special film, which performs a protective function. It should not allow the cores to stick together due to heat from use.
A typical KG wire contains from 1 to 5 wires. As you can see, the core cross section determines the power that the cable can handle. Operated this cable at a temperature range from.40 to 50 degrees. KG cable can withstand voltages up to 660 V. Usually this wire has the following designation: KG 3x51x4. This means that there are three-phase cores that have a cross section of 5 kV. mm, and one grounding conductor with a cross-section of 4 sq. mm.
Regardless of what kind of wire will be chosen to connect the electric stove, it should be bought with a reserve of length to be able to move the product. In addition, the wiring going indoors and at the entrance to the apartment must be of good quality, which should also be checked before wiring.
Preparing to connect an electric stove
In some cases it may be necessary to lay a separate cable, accompanied by minor repairs. This is due to the requirements of PUE and other regulations, which provide for a separate continuous cable with copper conductors with a minimum cross section of 4. 6 mm2. The wire is laid from the input panel directly to the appliance.
To protect the leased line, circuit breakers are used that match the load. Cross-section of the cable is chosen according to the table on the basis of current or power value. The correct choice of cable is essential. When buying it is advisable to check the diameter of the strands with a caliper or micrometer and compare the data obtained with the parameters stated in the certificate. To connect to a single-phase network will need a three-core cable of 1st or 2nd class, brand VVG or PPV.
The choice of automatic protection device is made in accordance with the power of the stove. It is not recommended to connect other electrical appliances to the same line. Additionally installed RCD, whose leakage current does not exceed 30mA. Its rated current must be higher than that of the breaker. This measure provides protection against electric shock in the case of a faulty stove or an insulation fault. For a more compact placement in the switchboard can use a differential circuit breaker, which combines the qualities of both protective devices.
Connecting electric stoves Hansa, electrolux, Bosch, zanussi and others
Electric stoves have been part of our daily life for a long time now, but unfortunately not everyone knows how to connect them.So, if you have purchased one of these stoves and are going to connect it yourself, this article will help you in this. In this article we will try to explain step by step how to do it correctly, and most importantly safely!
It is also worth noting that, although electric stoves and are considered household, but consumed enough power. this is worth considering both the installation and further operation of electric heating appliances at home.
Before installation, carefully read the installation instructions. If any items have caused you doubt, it is better to entrust the installation to a qualified electrician. Remember that the manufacturer’s warranty does not apply in case of connection of the electric stove with violations of the rules and regulations for the installation of electrical equipment.
We suggest you consider how to choose the right accessories for installation: cable, plug, socket, circuit breaker. Connect the electric stove and oven to a single-phase, two-phase, three-phase power supply network of 220 and 380 volts with your own hands.
Independent connection of the electric stove
Before you begin any work on the connection of electrical equipment to the network, you must carefully study the technical passport of the product, which must be attached, as well as familiarize yourself with such normative documents as PUE 7 edition and PTEEP.
Step-by-step instructions for connecting electric stoves electrolux ekc, zanussi, Hansa, gorenje, Bosch, ariston, Beko, Hotpoint, indesit, greta, kaiser, aeg, nord ep, Samsung to the power grid:
Step 1. Cables, Circuit Breaker and RCD
The electrical supply to the stove should be run with an independent cable going directly to the electrical distribution box of the apartment. For cable routing from the switchboard to the socket, you can use the following types of cables: VVG; VVG-NG; PVA; SHVVP. And from the socket to the stove, it is better to connect multicore wires, such as PVS or KG, which are more resistant to bending during repeated use.
The cross-section of the cable depends on the voltage of the network, the number of phases and the power consumption. Knowing these parameters, you can choose a suitable cable from the table. The cross section of the conductors is better to take a reserve of one order of magnitude more.
Connection should be made from a separate circuit breaker. The nominal current of the automatic circuit breaker must be one higher than the consumption current of the electric stove.
Electric Power (3 of 3) Calculating the Cost of Electric Power
All of the characteristics of the electric stove can be found in the technical documentation that accompanies the purchase, as well as to indicate them on the case. The time-current characteristics of the circuit breaker must be group C.
It is also desirable to install and safety device (RCD), which will protect people from electric shock, in case of accidental contact with faulty equipment. The RCD should be installed near the circuit breaker, and connected after it. Its rating should be an order of magnitude smaller than the automatic circuit breaker. Earth leakage current is less than 30 mA. All screw terminals must be clamped carefully, since a large current will flow through them.
Step 2. Installing the outlet
Not every apartment, kitchen has a power outlet intended for connecting powerful appliances that consume more than 3 kW. This is usually a single-phase power outlet that is rated at 32 A or 40 A.
We suggest you consider how to choose and install the correct socket for the electric stove:
Choosing a Backup Generator Plus 3 LEGAL House Connection Options. Transfer Switch and
Turn on the circuit breaker in the switchboard of the apartment. Use a multimeter to check for voltage on the phase contacts of the outlet.
Step 3. Open the back of the stove
To connect the cable to the stove, you need to find and unscrew the small cover on the back of the stove that covers the terminals for the wires.
The back wall of the household stove
Once you have removed the cover you need to fix the cable. This is done in order to avoid accidental pulling of the cable from the hob. Insert the cable and fasten it to the hob body in the special clip.
The hole for the wiring of the ZWI cable
Step 5. Installing the copper jumpers
Depending on the number of phases of the power supply, the wiring is done differently. In order to properly coordinate the connection of the stove to the various power networks, special copper jumpers are included with the terminal block. According to the circuit you have chosen, install the jumpers in the socket and tighten the screws where the wires will not be connected.
Connecting the wires to the household stove
Step 6. Connect the wires
Connect the isolated neutral and ground with the jumper
After connecting all the wires, once again check the wiring diagram, make sure there are no errors. Tighten the clamping screws firmly. But remember: in all the stoves, the plugs are made of a delicate material, don’t use too much force or you will damage them. Now you can close the cover and tighten the mounting screws.
The final connection of the wires to the household electric stove
Step 8. Connecting to the mains
Before connecting the oven to the mains, make sure that the circuit is assembled correctly, all the live parts are closed. Turn on the circuit breaker and RCD, check the presence of voltage in the socket. Plug in the hob. According to the instructions, make sure that all its functions work properly.
Video instruction on how to connect the electric stove
Connecting the stove in a single-phase network
Unlike in a private home or commercial enterprise, in an apartment is not possible to connect the electric stove to the three-phase network. Therefore, we will consider single-phase connection used in apartments. Most stoves have the following terminals to connect the wires: L1; L2; L3; N1; N2; and a ground contact.
What is a three-phase mains?
A three-phase grid is a way of transmitting electrical current when alternating current flows through three wires, and one wire returns back.A three-phase circuit consists of three phase wires and one neutral. This is possible because the phase of the alternating current in each of the three wires is 120° displaced with respect to its neighbor.
Three-phase power supply system is a particular case of multiphase AC electrical circuit systems, in which the sinusoidal emf of equal frequency generated by a common source, shifted relative to each other in time by a certain phase angle. This angle is 2π/3 (120°) in a three-phase system.