2 circuits showing very similar but not exact usage.

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    • January 10, 2022 at 7:00 pm #8218 Report Abuse
      Anthony
      Member

      I have a strange mystery. Two of my ‘circuits’ show almost identical usage but not exactly the same. I have overlaid the usage in excel (see below). The house is very old (UK) and had multiple wires in each fuse (yes, fuses) but I clipped each wire individually. No double pole breakers. Balance hovers between 0 and 1%. I can’t currently visit the house to investigate due to covid so for now I am trying to think how this could happen. Installed yesterday so it has been like this from day one.

      Is it possible the two circuits are joined somewhere else in the house with one wire carrying on to other sockets. Would that result in what I am seeing?

      Perhaps I accidentally clipped two wires with one of the clamps, but wouldn’t the balance be out then?

      Any help much appreciated.

      Two circuits similar usage

    • January 11, 2022 at 1:48 am #8227 Report Abuse
      megachase
      Member

      Do they ever deviate? Maybe 2 light switches side by side with similar loads but on different circuits? Are there any smart switches controlling 2 things? A/V system with powered satellite speakers? Pretty spikey load whatever it is. Should be easy to spot next time you go there. Looks like it matches a sleep/wake cycle.

    • March 15, 2022 at 7:27 pm #8406 Report Abuse
      JonB
      Member

      Is it a ring circuit?  I’m not from the UK, but I’ve read that’s something somewhat common there.

      https://en.wikipedia.org/wiki/Ring_circuit

    • April 4, 2022 at 11:37 am #8441 Report Abuse
      Peter
      Member

      A ring circuit would do this, and the difference is from the load not being in the middle of the circuit. The wire closer to the fuse will show slightly higher current, but both wires will show matching load data.

    • May 22, 2022 at 5:25 pm #8531 Report Abuse
      Anthony
      Member

      Thanks for the replies. I put both wires into one CT and problem solved.

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