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Maximum Wattage for One Phase Connection: 3.6KW Devices in Dormitory - Safety & Precautions

Pietia10 65016 18
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Can I safely connect two devices with a total load of 3.6 kW to one phase in a dormitory, and how can I check whether the installation can handle it?

It depends on the dormitory’s protection and wiring, because 3.6 kW at 230 V is almost 16 A, so it may be enough to trip the fuse or overload the circuit [#13454499] [#13454501] In the thread, people noted that some rooms may have only 10 A protection on one line, while others may have 16 A, so there is no universal limit you can assume [#13454614] [#13454581] The safest advice was to check the fuse box and, better yet, ask the building administrator what protection is installed [#13454610] [#13454502] Wire size also matters, not just the fuse rating; one reply mentioned installations with 3x1.5 mm cable, while another said protections are normally chosen to match the cable’s current-carrying capacity [#13455236] [#13455308]
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  • #1 13454488
    Pietia10
    Level 9  
    Posts: 7
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    Hello, I would like to know how many watts can be connected to one phase, I live in a dormitory and I would not like to burn anything but I want to connect 2 devices with a total power of 3.6KW or something can go wrong?
    I will add that I am completely green in this matter.
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  • #2 13454497
    MietekFighter
    Level 21  
    Posts: 466
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    If you go too far, security should work.
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  • #3 13454499
    ziomus90210
    Level 35  
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    HPS? :) 3.6kW is about 16A for a resistive load at 230V, so it is rather absent. It all depends on the overcurrent protection and installation.
  • #4 13454501
    goldi74
    Level 43  
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    3.6 kW gives a power consumption of almost 16A.
  • #5 13454502
    dedito
    Level 39  
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    If so, the fuses may fly. It's best to ask the building administrator.
  • #6 13454578
    Pietia10
    Level 9  
    Posts: 7
    Rate: 7
    From what I understood, 3.6kW gives 16A and 16A is the maximum current consumption on one phase anyway? So if I connected less, let's assume 3kW, it would not be a problem?
    How can I check without asking the building administrator about it?
  • #7 13454581
    goldi74
    Level 43  
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    And it is not known if 16A is the maximum current consumption. Depends on the security features in the dormitory.
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  • #8 13454586
    dedito
    Level 39  
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    Depends on your installation. I usually meet 16A overcurrent protections for sockets in the room, but I don't know how it is in dormitories.
  • #9 13454604
    Pietia10
    Level 9  
    Posts: 7
    Rate: 7
    And I can check somehow without connecting these devices to the network and without asking the building administrator what the network security is?
  • #10 13454610
    dedito
    Level 39  
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    Look at the fuse box. However, I would advise you to give up on it, because it can only result in some misfortune.
  • #11 13454614
    KapitanSTS
    Level 30  
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    Better ask the building administrator because you can have 10 A security for one line. P (power) = U (voltage) * I (current). So count I = P / U comes out 3600W / 240V = 15A. If the administrator has installed "esy" 10A, the protection will work for sure. After all, 10A security was usually available for one room.
  • #12 13454624
    dedito
    Level 39  
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    KapitanSTS wrote:
    So count I = P / U comes out 3600W / 240V = 15A

    We have 230V in Poland.
  • #13 13454641
    KapitanSTS
    Level 30  
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    Yes sorry ;) I forgot that we raised it from 220 to 230 and not from 230 to 240 ;) My mistake, I don't think anything anymore today.
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  • #14 13454642
    ziomus90210
    Level 35  
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    Rather more than 16A, not because standard sockets have max. 16A
  • #15 13454650
    dedito
    Level 39  
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    There is nothing to think about because the author is unfamiliar with the electrician, and if he starts to think about something, it can only be a misfortune. I consider the topic to be exhausted.
  • #16 13455236
    ToJestNick
    Level 31  
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    It is not only about protection, we also do not know the cross-section of the wires (I used to meet installations with a cross-section of 3x1.5mm).
  • #17 13455258
    dedito
    Level 39  
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    ToJestNick wrote:
    It is not only about protection, we also do not know the cross-section of the wires (I used to meet installations with a cross-section of 3x1.5mm).

    Have you come across a method of selecting protections without the current carrying capacity of the wires?
  • #18 13455286
    ToJestNick
    Level 31  
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    Yes ;) I saw an installation with 3x1.5mm cables and 16A protection in one apartment :) Installation made by a qualified electrician, and I do not see something that the 1.5mm cable can withstand such a load.
  • #19 13455308
    dedito
    Level 39  
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    ToJestNick wrote:
    Yes ;) I saw an installation with 3x1.5mm cables and 16A protection in one apartment :) Installation made by a qualified electrician, and I do not see something that the 1.5mm cable can withstand such a load.

    It will endure. My point is that under * normal * conditions, the protection is selected taking into account the load capacity of the cables.
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Topic summary

✨ The discussion revolves around the safe connection of devices with a total power of 3.6 kW (approximately 16A) on a single phase in a dormitory setting. Participants emphasize the importance of understanding the electrical installation, including the overcurrent protection and wire gauge. It is noted that the maximum current capacity can vary, with some dormitories potentially having 10A fuses, which would not support a 3.6 kW load. Users suggest checking the fuse box for specifications and recommend consulting the building administrator for accurate information regarding the electrical system. Concerns about the risk of overloading circuits and the potential for electrical hazards are highlighted.
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