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Overheating Boiler Plug and Cable: Replace Plug or Entire Cable?

MIO24 35508 10
Best answers LABEL_AI_GENERATED

Why is my boiler plug and the first 15–20 cm of cable overheating, and should I replace the plug or the whole cable?

The overheating is most likely caused by high contact resistance in the plug, so replace the plug; if the plug and socket have already been hot, replace the socket too [#14295998][#14296072] Since the cable heats up starting right at the plug, the fault is more likely at the plug/socket contact than in the entire heater cable [#14295998] You should also have the continuity of the installation conductors checked, not just the circuit feeding that socket, because a lost PEN continuity or similar wiring fault can be part of the problem [#14295938][#14296017] Measure the short-circuit loop impedance before and after replacement, as recommended [#14296072] If you are not sure, call a qualified electrician because this is a dangerous situation [#14296026]
AI summary based on the discussion. May contain errors.
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  • #1 14295912
    MIO24
    Level 8  
    Posts: 44
    Rate: 42
    Hello
    I have a problem with the heating cable and the boiler plug (the pins are so hot that they burn, the cable heats up to 15/20 cm from the plug). I will add that the cable to the socket is 3x2.5. The original plug is flooded, I don`t know what to do now because everything the socket has already been checked, including the new one, now I`m wondering whether to replace the plug or maybe the entire cable from the heater itself? the cable there is not too thick, probably 3/1 mm or 3x1.5 I am asking my colleagues for help. Thank you in advance. Matthew
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  • #2 14295938
    kkas12
    Level 43  
    Posts: 17403
    Help: 1076
    Rate: 4315
    The reason may be potential equalization between the boiler grounded through the foundation and the PEN cable which has lost continuity.
  • #3 14295947
    MIO24
    Level 8  
    Posts: 44
    Rate: 42
    Buddy, tell me in simple words, I`m a beginner.
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  • Replace the plug to eliminate transition resistance

    #4 14295998
    ronwald
    Level 27  
    Posts: 876
    Help: 85
    Rate: 68
    MIO24 wrote:
    Hello
    I have a problem with the heating cable and the boiler plug (the pins are so hot that they burn, the cable heats up to 15/20 cm from the plug). I will add that the cable to the socket is 3x2.5. The original plug is flooded, I don`t know what to do now because everything the socket has already been checked, including the new one, now I`m wondering whether to replace the plug or maybe the entire cable from the heater itself? the cable there is not too thick, probably 3/1 mm or 3x1.5 I am asking my colleagues for help. Thank you in advance. Matthew


    You are heating up at the transition resistance P=I²*Rp inside the plug.
    Replace the plug.
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  • #5 14296008
    MACIEK_M
    Level 29  
    Posts: 1179
    Help: 111
    Rate: 462
    Probably poor contact in the socket. Replacing the socket should help.
  • #6 14296017
    elpapiotr
    Electrician specialist  
    Posts: 12212
    Help: 1015
    Rate: 3533
    MIO24 wrote:
    buddy, what about normal language?
    In this normal language, you need to take a meter and check the continuity of the wires in the installation, not only the one supplying this socket.
    PS. Mate MACIEK_M, of course
    MIO24 wrote:
    I don`t know what to do now because everything related to the socket has already been checked, including the new one
  • #7 14296026
    kkas12
    Level 43  
    Posts: 17403
    Help: 1076
    Rate: 4315
    Quote:
    buddy, what about normal language?


    In "normal" language it would sound like this:
    Contact Kumaty elektrykie m, because it is a very dangerous situation.

    Of course, the reason may also be what my colleagues said.
  • #8 14296043
    MIO24
    Level 8  
    Posts: 44
    Rate: 42
    Ok, I`ll check the resistance, if it`s OK, I`ll replace the plug (please advise me which plug to choose)
  • #9 14296072
    kkas12
    Level 43  
    Posts: 17403
    Help: 1076
    Rate: 4315
    If it was hot, it was hot, so you should replace both the plug and the socket.
    Measuring the short-circuit loop impedance before and after replacement is also desirable (read: required).
  • #10 14296144
    MIO24
    Level 8  
    Posts: 44
    Rate: 42
    Only the contacts don`t show anything that would indicate something is happening in the socket, I can`t see the plug because it`s flooded.
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  • #11 14296303
    kkas12
    Level 43  
    Posts: 17403
    Help: 1076
    Rate: 4315
    Since you know everything and prefer the path of least resistance, I`m closing the topic.
    Especially since all the explanations have already been given.
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around a heating cable and boiler plug that are overheating, causing concern for safety. The original plug is flooded, and the user is uncertain whether to replace just the plug or the entire cable. Responses suggest that the overheating may be due to poor contact in the socket or high transition resistance within the plug. Recommendations include checking the continuity of the wires, replacing both the plug and socket, and measuring the short-circuit loop impedance. The user is advised to consult an electrician due to the potential danger of the situation.
AI summary based on the discussion. May contain errors.
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