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  1. C

    Calculating the correct cpc size

    Thanks again for the replies. From fig 3A4 the current that would cause a 20 A rcbo to trip in 0.1 to 5 seconds is 100 A T = 5 Seconds (distrubution circuit) K =115 Putting these figures into the adiabatic equation, I get a minimum cpc of 1.9 mm2 Could someone please advise if i have used...
  2. C

    Calculating the correct cpc size

    Hi everyone, thanks for the replies. Max zs for a 20A rcbo is 2.19, giving a fault current of 105 A, 230/2.19.Using 5 seconds for t as it a distribution circuit, think this is where i'm going wrong. K =115. Putting these figures into the equation gives a cpc of 2.04, far too high i think...
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    Calculating the correct cpc size

  4. C

    Calculating the correct cpc size

    Good evening all, Some help with following would be much appreciated. A 20 Amp rcbo in a CU supplies an adaptable box on the outside wall of a house via 2.5mm2 T & E. From the adapatable box a short lenght of SWA supplies a couple of sockets and light in a shed. My question is does the 1.5mm2...
  5. C

    Connecting rigid conduit to flexible conduit

    Good evening all, My first posting on this site. Some advice on the following would be greatly appreciated. Am I right in thinking that the best way of connecting rigid conduit to flexible conduit is by screwing the gland on the flexible conduit into a female adapter? Or is it acceptable to...
  6. C

    Christopher C New member

    Good evening Rpa07 prefer the installation work, however get a lot of satisfaction out of faultfinding to. Hoping to get involved in a rewire either at work or with a local electrician in the East riding area, to gain more experience.
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    Christopher C New member

    Hello everyone, Just a few lines to introduce myself to this forum. Fairly new to this industry and currently working for the local authority as a domestic electrician, mainly carrying out installation work and faultfinding. Hoping to get involved in some rewires shortly to gain as must...

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