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Kettle heating element wire burnt out - is my element cactus?

Discussion in 'Electronics, Hardware & Software' started by mr_wibble, 12/10/17.

 

  1. mr_wibble

    Beer Odd

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    Posted 12/10/17
    G'day,

    My kettle failed to heat water past 35C when I turned it on yesterday.
    It worked fine 2 weeks ago (last time I turned it on).

    So I open up the connector box to find one of the wires has burned out:
    failed_wiring.jpg

    The wire is 4mm conductor rated to 20A, 4500w element at 240V ≈ 19A.
    It is within specifications in terms of load.

    Is this sort of failure caused by the element, wiring, or something else?
    Perhaps it was not getting a good connection to the terminal.

    Is the element probably going to be cactus?

    I guess I can re-wire it this afternoon, but would like to order a new element ASAP it it's going to be stuffed.

    thanks,
    -kt
     
  2. MHB

    Well-Known Member

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    Posted 12/10/17
    Mostly its caused by a bac connection between the wire and the element, a drop of water/wort/condensation can lead to a bit of corrosion which causes increased resistance and creates a hot spot.
    I like to crimp the wire into an appropriate copper or brass connector, clean the contact point on the element and tighten it up. You can get a paint/paste type stuff that will keep water out of the joint, might be worth asking an electrical supplier what they have available, I know its often used in control boxes and on electrical contacts around swimming pools.
    Odds on the element is fine.
    Mark
     
    koshari likes this.
  3. mr_wibble

    Beer Odd

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    Posted 12/10/17
    Cool, thanks for that.

    It's going to be a PITA to disassemble it and repair.
    Guess I wasn't planning to brew this weekend anyway.
     

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