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  1. spark 68

    voltage tester

    Nah! just someone's pi$$ed in shreks beer lol ;)
  2. spark 68

    voltage tester

    All probe combinations on TP+N +E
  3. spark 68

    Max Zs permitted values..

    I wonder if the first figure should read 1667 ?, maybe two different operatives ? and one has put the max Zs for the RCD part and the second has put the max Zs for the MCB part ? just a thought.
  4. spark 68

    Bonding Gas Supply in an Outbuilding

    Okay fair enough, I think we are singing from the same hymn sheet here, when designing a sub-main we go through the assessing compliance bit when we are selecting our cables, and no I wouldn't try to make up the csa as a mix. I was taught that where PME conditions apply that we allow for the...
  5. spark 68

    Bonding Gas Supply in an Outbuilding

    They may well be physically connected, but need to be assessed for compliance individually, as in the OPs case in this long thread, the armourings may well comply as a CPC, but not as a MPB, so ideally he would need a 10mm core to fulfil the MPB part, this is what you yourself were putting...
  6. spark 68

    Bonding Gas Supply in an Outbuilding

    Arghh! we don't, either the core complies, OR the armourings comply for a "straight" CPC, that is what we have been saying, the armourings are earthed for protective reasons where a core is used as the CPC, NOT to make up the csa. Sometimes we use a core for a bonding conductor, and the...
  7. spark 68

    Bonding Gas Supply in an Outbuilding

    Oh! god not again, you cannot split the functional requirements of a single protective conductor across different materials. In this case Armour complies to equivalent 10mm copper = fine core complies to 10mm = fine Neither complies not fine the other parts of that section Armour complies as...
  8. spark 68

    Hager MCCBs Advice needed

    well if it was limited to say 3 pitches per cable that would probably not overload, the (16A MCB/RCBO In X 1.45) X 3 off, it could possibly pull approx. 69 to 70 A for about an hour, but the chances of all 3 pitches pulling that amount together for that length of time would be slim I would have...
  9. spark 68

    Hager MCCBs Advice needed

    Sounds a bit of a pigs ear tbh, how many pitches/points does that MCCB feed ?
  10. spark 68

    Hager MCCBs Advice needed

    I suppose it is possible that overload protection has been omitted, and they are only providing fault protection for the 16mm SWA cable buried underground ?
  11. spark 68

    Hager MCCBs Advice needed

    A quick Google it seems they are rated 15kA Ipf, which may be needed depending what the Ipf is at the intake of that board, how long is the run to the RCBOs/caravan pitch ?
  12. spark 68

    Hager MCCBs Advice needed

    I didn't expect the final RCBOs to be adjustable, I would have been surprised if they were :)
  13. spark 68

    Hager MCCBs Advice needed

    It might be needed as backup protection for high prospective fault currents amongst other things.
  14. spark 68

    Bonding Gas Supply in an Outbuilding

    This is the argument that is raging lol, the regs say we cannot combine them, different materials ;), GN8 says not, they each have to comply in their own right, ie. 10mm ,or equivalent for the armourings. This was partly my fault because I originally looked at a dodgy table which was over...
  15. spark 68

    Non-Harmonized cable in Enclosure

    I didn't think Dave was Shouting Charlie, he is making a valid point though, you cannot really make a sweeping statement that the OP is doing it wrong, the manufacturer has told the OP what they want, whilst he does not have to follow their recommendation it may affect any warranty or cause...
  16. spark 68

    max zs table in the osg

    Well even in BS7671 there is provision to deviate as long as the same outcome or better is achieved, it tells us this in the good book itself. Now most sparks (me included) will just follow the book because we are not qualified to know any better, this is no reflection on our ability and...
  17. spark 68

    a CLEAN power supply to a music system?????

    Seriously ??? If the client is really hearing noises on his Hi-Fi caused by other circuits then I think he has more serious electrical problems to deal with first.
  18. spark 68

    a CLEAN power supply to a music system?????

    I can see you ending up married to that job lol, "Audio phools" will pay silly money for things like "oxygen free" cable with "enhanced insulation" which they can hear makes a difference to the sound, run forest, run :) lol
  19. spark 68

    Eicr bonding

    I thought you's only took the wheels and the radio ? :)
  20. spark 68

    Neutral Earth Fault

    That I don't know, but does the mast have an RA of less than 200 ohms ? ;) Poor old UK is walking the plank, E54 with the sword behind him, and Tony with the cosh lol :) H69 strapped to the front as a figure head lol, on the good ship Electrical forum lol :)

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