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  1. R

    Joys of "Park" homes - Can an RCD be described as "Earth Leakage Circuit Breaker" ?

    agreed, you can do that, it clearly states in the guidlines that you can. you have answered your own question, why ask it?
  2. R

    Joys of "Park" homes - Can an RCD be described as "Earth Leakage Circuit Breaker" ?

    OK 1.Instead of an RCD you can use a MCB as FAULT PROTECTION "IF" the Rod Resistance is low enough to do so. BUT supposing your Rod Resistance was 50 ohms? 230/50 =4.6A on Fault. This wouldn't be enough to trip a 5A Breaker or fuse. Answer? Fit a Time Delay RCD Type S ( time delay 100mA ) as...
  3. R

    What type of circuit breaker would be used for a three phase circuit?

    only need an RCD device if you are supplying the equipment through a socket. Otherwise it's just a triple pole mcb and neutral isn't switched.
  4. R

    Joys of "Park" homes - Can an RCD be described as "Earth Leakage Circuit Breaker" ?

    If you had a high Rod impedance is what I am referring to. If you did have ( for instance 99 ohms ) or less and an overcurrent device would not suffice in protecting your install , how would you have fed a Ring and a Cooker Circuit ? lets just say it was 20 ohms would you feed the supply through...
  5. R

    Joys of "Park" homes - Can an RCD be described as "Earth Leakage Circuit Breaker" ?

    in the Regs 411.5.2. Fault Protection. if your Earth Rod Impedance is low then you can rely on a overcurrent device but the Earth Rod changes all the time depending on the ground conditions, always err on the side of safety. ( my motto ) you do as you like my friend but I am devout RCD man on TT
  6. R

    What type of circuit breaker would be used for a three phase circuit?

    Are you discounting the ADS in favour of the rcd? because that only applies on a TT supply
  7. R

    Joys of "Park" homes - Can an RCD be described as "Earth Leakage Circuit Breaker" ?

    The TT supply must have an RCD of 100mA Time Delay or a 300mA rcd. The circuits downstream must have an RCD of 30mA for Discrimination ( now called Selectivity ) The RCD is an Earth Leakage Device the older types now banned and obsolete were Voltage operated circuit breakers
  8. R

    What type of circuit breaker would be used for a three phase circuit?

    you don't need an rcd unless you are supplying the equipment via a socket outlet of 32A or less. If you are wiring through a local isolator to fixed or immovable equipment you do not need an RCD. A 16A tp mcb will do just fine probably type C
  9. R

    It has always worked fine.. what's the problem?

    It''s a code 1 and must be corrected immediately.
  10. R

    Help with insulation resistance testing on a lighting circuit

    It seems you are confused here. the R1+R2 figure is combined with Ze to give Zs. The insulation resistance readings have their own columns. The IR of 3.17 Megohms is more than enough to satisfy the current regs.

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