Is 20A Circuit Protection Sufficient for a 4.6kW Induction Hob in a 25A Apartment?

Hello,

I am trying to buy an induction hob. I have 2.5 mm2 connected from the switchgear and 20A secured. The whole apartment is secured with 25A, so I cannot lift this 20A security. The album I am trying on has 4.6 kW. From the formula for power, it comes out to the contact (20A * 230v = 4600W). The question is whether such CDs do not have higher power consumption at the moment. Besides, I wonder if the remaining power supply (slightly above 1.1kW) is enough for the rest of the apartment. I always have an alternative and buy a 3.5kW CD - but I'm afraid if it won't be too weak.

Thanks for the help.
Greetings

If you have one phase in your apartment, then buying a 4.6kW board is not a good solution. In addition, you have to protect the cable, not the receiver.

1.1 kW is a bit of a reserve, but 4.6 kW of the stove is the maximum power.

Take into account the degree of simultaneity. How many times a year do you cook something on all the cooking zones, set to max? And if they are not set to max, they turn on and off. In my opinion, these 20A are enough. 4.6kW is the maximum power and in practice it is not used like this. The second thing is that the stock you have left for your apartment is low. Several devices in a "stand-by" computer TV, and someone suddenly turns on the kettle or a washing machine.

Thanks, I did not think that so many people sit over the forum at lunchtime on Sundays. Elsewhere, I found information that apparently the cookers have the possibility of adjustable max consumption. I will try to check it in the store.

piter244 wrote:

In my opinion, these 20A are enough. 4.6kW is the maximum power and in practice it is not used like this.

Interesting way of selecting security.

The calculation shows that it will withstand even full load, so I was tempted to take into account simultaneity. If in today's apartment equipped with all electrical devices to calculate the protections based on their maximum consumption and assuming simultaneous use, then in half of the cases and 64A would turn out to be insufficient.

piter244 wrote:

If in today's apartment equipped with all electrical devices to calculate the protections based on their maximum consumption and assuming simultaneous use, then in half of the cases and 64A would turn out to be insufficient.

The title post mentions a wire with a cross-section of 2.5mm?.
Does it have any meaning in terms of the selection of security features or not?

Well, I read in the 19A long-term load capacity table for a 2.5mm? cable. At the same time, it is with a reserve. I would not prevent the connection of the board with this one amp.

Łukasz-O wrote:

piter244 wrote:

In my opinion, these 20A are enough. 4.6kW is the maximum power and in practice it is not used like this.

Interesting way of selecting security.

And what colleague proposes?

piter244 wrote:

Well, I read in the 19A long-term load capacity table for a 2.5mm? cable. At the same time, it is with a reserve. I would not prevent the connection of the board with this one amp.

However, I would argue that rounding "down" is a bit safer.

Well, you can put a 16A protection there and buy a board with a lower maximum power. But the author already has a fuse that someone installed there, maybe even on the basis of some design, and he asked about the CD.

piter244 wrote:

But the author already has a fuse that someone installed there, maybe even on the basis of some design and he was asking about the CD.

So you have to take the designer aside. He did not anticipate the album !!!

In table 52C1 the load capacity (PVC insulation, two loaded cores, core temperature 70 ° C, ambient temperature 30 ° C):
column A1 19.5A; column A2 18.5A; column B1 24A; column B2 23A; column C 27A; column D 29A.
Columns A1 and A2 refer to the installation of cables in an installation pipe in a heat-insulated wall (e.g. in wool, polystyrene).
Columns B1 and B2 refer to the installation of wires in an installation tube on a wall, e.g. wooden, or in an installation tube in a brick wall with a thermal resistivity of the wall of no more than 2Km / W.
Column C refers to the installation of wires directly on a wooden wall or in a wall (under the plaster) with a thermal resistivity of the wall of no more than 2Km / W (that is, in virtually any wall).
The column D refers to laying in the ground.
Do we choose polystyrene?

The board should be 4mm2, moreover, in a large part of the manual you will find the same. At 2.5mm, you should not install such a plate. I know from experience that a record on Saturday or before Christmas, a TV set, a computer, a light, a washing machine ... and it's not enough. There is no option for 3f?

15kVmaciej wrote:

This 4.6kW board can safely be protected by C16A and will work without any problems. I am conscious and I know what I am writing.

And why the C characteristic of the security?

mar_cik wrote:

And what colleague proposes?

I already expressed my opinion in the second post. And I consider proposing a 20A security without an on-site visit to be a mistake.

Łukasz-O wrote:

mar_cik wrote:

And what colleague proposes?

I already expressed my opinion in the second post. And I consider proposing a 20A security without an on-site visit to be a mistake.

In the second post, a colleague wrote that with a single-phase power supply, a colleague sees some contraindications for buying a disc.
My daughter's apartment (a family with two small children) is single-phase powered, there is a hob and an oven and a dishwasher, of course a washing machine, only a microwave (such a whim).
In addition, a colleague wrote that the cable should be secured, not the receiver. For as long as I remember, we select the protection for the receiver, and with the protection, we select the cable. If a colleague sees it differently, please describe it using this example.

I would be careful to select a 4.6kW induction hob cable and fuse under the limits, if less powerful solutions are available. All the more so if the entire installation is protected by 25A. Unfortunately, there will be problems in the future - if we add a washing machine (which is definitely in the apartment), an oven, a dishwasher (even if it is not there, it will certainly be in the near future), an electric kettle ... You always have to take into account the maximum load. Practice shows that even when preparing a small party, a lot of it is attached. Just like yesterday, I was at a small celebration, where you couldn't brew tea, because there was pizza in the oven, the washing machine was doing some minor laundry (you remembered about an unwashed sweater before going to school). Of course, we waited a bit and it was ok, but why generate such problems ?? In addition, in my humble opinion, loading the cable 2.5 mm & sup2; it is not safe for various reasons - including fire reasons; after all, there are still some connections, contacts ... And I assume from practice that the installation is assembled once, and then it does not maintain, does not check the contacts, connection elements - boxes, etc. until failure.

Or maybe a priority switch? What does colleague robertgro have in the apartment apart from the aforementioned album?

mar_cik wrote:

In addition, a colleague wrote that the cable should be secured, not the receiver. For as long as I remember, we select the protection for the receiver, and with the protection, we select the cable. If a colleague sees it differently, please describe it using this example.

No, buddy. First, write down where and when you encountered such a principle. Almost or normal.

mar_cik wrote:

In the second post, a colleague wrote that with a single-phase power supply, a colleague sees some contraindications for buying a disc.
My daughter's apartment (a family with two small children) is single-phase powered, there is a hob and an oven and a dishwasher, of course a washing machine, only a microwave (such a whim).
In addition, a colleague wrote that the cable should be secured, not the receiver. For as long as I remember, we select the protection for the receiver, and with the protection, we select the cable. If a colleague sees it differently, please describe it using this example.

I know what I wrote in the second post. Nowadays, supplying apartments in our conditions from one phase is a misunderstanding, if there is no gas in the apartment, it is a failure.
I have no idea what the power allocation of my friend's daughter is. I assume that 5kW, such power allocations, was a standard in the People's Republic of Poland. So I will ask you, as an electrician, do you think this is a good solution? Load installations to the limit and be proud that it works?
Stubbornly recommending such a cooker for an apartment with a standard power of 5kW is a big mistake.

But in the author's situation, the cable was chosen by itself and it is there. This sequence is completely pointless.
Is this how it is designed?
In my opinion, it is primarily the installations of my colleague that are secured. The receiver should have its own protection. Will you put B6 on the circuit to the living room?

Łukasz-O wrote:

In my opinion, it is primarily the installations of my colleague that are secured. The receiver should have its own protection.

If the manufacturer determines that it is necessary.
Therefore, the electrician selects the device wires not a security. The protection matches the wires!
And for devices, it is their designer and manufacturer.

Łukasz-O wrote:

The receiver should have its own protection. Will you put B6 on the circuit to the living room?

This is how you think in terms of the circuits of general sockets and lighting, not a living room, not sockets or lighting, but a specific device powered by its own circuit.

mar_cik wrote:

Łukasz-O wrote:

The receiver should have its own protection. Will you put B6 on the circuit to the living room?

This is how you think in terms of the circuits of general sockets and lighting, not a living room, not sockets or lighting, but a specific device powered by its own circuit.

So what if it's not a salon? At WT there is no division into a lounge and a waiting room. No need to install a dishwasher, washing machine and instantaneous water heater.

I waited for you to write how the stupid manufacturer did not attach the fuses to the engine, you just had to buy it yourself ... But you can and yes!

15kVmaciej wrote:

retrofood wrote:

I waited that you would write how the stupid manufacturer did not attach the fuses to the engine, you just had to buy it yourself

ABOUT! The disc started to spin!
But let's follow this lead, I have 2 asynchronous motors 0.75kW (somehow the manufacturer did not join fuses ), 4x1.5mm? wire, overload protection about 1A each, redundant 3x B6A. What did I do wrong

You have combined in one calf two functions. Electricity and Zam. producer (investor).
But it doesn't have to be dangerous.