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  1. S

    Lots of earth leakage from ovens

    Just an update for anyone interested, I got another rod in outside today, which has lowered the Zs db to a more healthy 53ohms. The oven elements IR still fluctuates quite a lot, still occasionally dropping below 1 Mohm after being switched off, but hasn't caused the rcd any trouble, and numbers...
  2. S

    Lots of earth leakage from ovens

    Must be something like that, really hoping they'll dry up/fix themselves with more use, otherwise that's 6 to replace or 2 new ovens to get! All the elements read lower than they should on IR. They're probably 8 years old, but as mentioned earlier have seen no use at all for the last 20 months.
  3. S

    Lots of earth leakage from ovens

    The gas has literally just been re piped in plastic by Northern gas, the driveway is still dug up, think the flow rate was too low so they needed to put a bigger pipe in, anyway it's plastic. Can't see the incoming water pipe or any bond there might be to it, its hidden under the floor. There...
  4. S

    Lots of earth leakage from ovens

    Ah, the moisture settling in different parts of the element depending on temperature sounds like it could be consistent with what I'm measuring! Both ovens are currently fine running on an RCD, the leakage has decreased significantly from yesterday, but IR readings still aren't great. Perhaps...
  5. S

    Lots of earth leakage from ovens

    But something weird happens where after running all the elements for a few minutes, the insulation resistance drops I've seen it as low as 0.26Mohm, but this is when the oven is off so nothing trips. A few mins later the IR rises up to acceptable levels again.
  6. S

    Lots of earth leakage from ovens

    Yep, just done the initially problematic oven now, the worst element of the lot which is the fan element is testing at 1.4Mohm, just about passable! Top and bottom elements are at 16 and 12Mohm. All the elements combined are reading 1.3Mohm.
  7. S

    Lots of earth leakage from ovens

    Some testing has revealed a problem: checked the Zs at the oven and got 815ohms! Zs db is similar, it's a TT system but the rod is under the floor so the soil will be very dry - not an effective earth connection. Clearly this needs rectifying. Both rcds have good trip times, and ramp test at...
  8. Screenshot_20240219_110532_Gallery.jpg

    Screenshot_20240219_110532_Gallery.jpg

    • Steve T
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    • Category: Electrical Videos
  9. Screenshot_20240219_110535_Gallery.jpg

    Screenshot_20240219_110535_Gallery.jpg

    • Steve T
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    • Category: Electrical Videos
  10. S

    Lots of earth leakage from ovens

    I clamped the main tails into the CU to check leakage, my 10-25ma reading is just for each oven, not the overall reading. Overall was much higher! Thats the odd thing, I thought after 1 hour the elements would surely be dry, but appeared to cause a trip anyway, and 3 hours later no more...
  11. S

    Lots of earth leakage from ovens

    Hi all, There's 2 single fan ovens in the house my mother recently moved into. Posh elecronic AEG units. It's been sat empty for a year, so the oven elements will have had a chance to accumulate some moisture. There's a dual RCD consumer unit, the ovens are on separate RCDs. One of the ovens...
  12. S

    Crabtree loadstar breaker compatibility

    Hi all, I needed to replace an MCB for an electric shower with a different rating, it's an older Loadstar consumer unit, and crabtree told me word for word that the new loadstar MCBs are compatible with all the older loadstar boards, I am not sure I agree. Pictures below for your thoughts...
  13. Screenshot_20231206_140019_Gallery.jpg

    Screenshot_20231206_140019_Gallery.jpg

    • Steve T
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    • Category: Electrical Videos
  14. Screenshot_20231206_140022_Gallery.jpg

    Screenshot_20231206_140022_Gallery.jpg

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    • Category: Electrical Videos
  15. Screenshot_20231206_140024_Gallery.jpg

    Screenshot_20231206_140024_Gallery.jpg

    • Steve T
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