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Two Faults.

Zoomup

I went to explore the reason for a failed immersion heater. The element tested out o.k. The rod 'stat had its main operating contacts welded together and the safety trip had operated and switched the element off. I renewed the rod 'stat. Then upon turning on the 20 Amp D.P. switch with neon it flickered the neon momentarily then it died. There was a supply in from a good old 60s M.K. 20 Amp switch down stairs, still operating perfectly, but its neon is a little dim. But the newish 20 Amp D.P. switch by the immersion heater had failed after about 2 years use from new. So I found one fault, and by operating the switch by the heater that switch then failed. You couldn't make it up, and then trying to explain that to the customer isn't easy.

Has anybody else had similar experiences?

Z.

Parents
  • 0

    Saw one recently where the client kindly emptied all the towels and blankets beforehand for access. Loads of stuff in piles around the room. Accessories can quite easily be subject to additional insulation in "normal" use.

    But i take the point about the well insulated tank, building regulations also stipulate insulation of hot water pipes so hopefully not too much lost heat to the local environment.

Reply
  • 0

    Saw one recently where the client kindly emptied all the towels and blankets beforehand for access. Loads of stuff in piles around the room. Accessories can quite easily be subject to additional insulation in "normal" use.

    But i take the point about the well insulated tank, building regulations also stipulate insulation of hot water pipes so hopefully not too much lost heat to the local environment.

Children
  • 0 in reply to OlympusMons

    So, what causes the demise of a wiring accessory that is being used at 30 or 40 degrees C? What actually fails inside?

    Z.

  • 0 in reply to Zoomup

    Don't think that 30 or 40 degrees is the issue.

    Best guess is cheap 20A DP switch (what make?)

    Otherwise poor screw terminal tightening.

  • 0 in reply to OlympusMons

    The airing clothing and bedding will protect the wall mounted switch from the heat of the tank and pipes. It will act like a thermal insulator.

    Z.

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