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  1. IMG_0047.png

    IMG_0047.png

    • newfutile
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  2. newfutile

    selectivity 60898 b6 to same

    It's a remote bin store fed from the flats communal area,it is in a locked cupboard but it's only a fb key which all the tenants and contractors should have
  3. newfutile

    selectivity 60898 b6 to same

    the time current curves don’t appear to say , also I guess they will only be selective for over currents , at a fault current of 228 amps there cant be any selectivity Eaton seem to suggest?
  4. IMG_0045.png

    IMG_0045.png

    • newfutile
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  5. newfutile

    selectivity 60898 b6 to same

    I have a small Consumer Unit fed from a 6 amp type B mcb to a 6 amp type B,it only feeds 1 light in a bin store . clearly we have no selectivity here ,would changing the feed mcb to a type C possibly 10 amp help achieve this? its only on 1.5 swa so I can’t go too high ,my ZDB is 1.05 ohms
  6. newfutile

    Running lights across scaffolding

    I have always wondered if there Is a need to consider scaffold an extraneous conductive part once lighting and security devices get Installed on it
  7. newfutile

    After a New Consumer Unit, now I need EICR & 100A DP Isolation Switch

    I guess your mean a s type (RCD) Residual Current Device in a tt system,otherwise there in no selectivity and little point in having rcbos,I have never had an rcbo fail only the rcds seem to fail for some strange reason
  8. newfutile

    Where to get spare megger probes?

    I have just purchased the wago test probes and cut the outer plastic about 10mm back to allow the hump on megger leads
  9. newfutile

    Getting a shock in a shower.

    While it’s true we don’t own the installation electricity at work regulations and h&saw say we are guilty of an offence for any dangerous situations left ,and we have to use the get out clause regulation 29 I think 28 If no danger arises from a particular system, item of electrical equipment or...
  10. newfutile

    Central locking fault

    I think that would come under "taking without owners consent" also you need to be insured to drive other vehicles where consent is also needed,.
  11. newfutile

    Grade F1 Smoke detectors

    No not any more only a LD2 D2 is minimum. For new or materialy altered F2 are allowed in bungalows,I enclose the table as its a little confusing.
  12. IMG_0030.png

    IMG_0030.png

    • newfutile
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  13. newfutile

    18th edition revision

    As above use the contents and indexes,they usually go in order so start of the exam maybe scope and definitions and towards the end special locations and prosumers. I always answer those I know for sure and flag the ones I need to look up
  14. newfutile

    UK Change RCD type at CU to enable RCDs at socket outlets

    those old mk rcds are very fast the figure you have quoted is the maximum allowed not the typical times,I have seen mk ones trip at 9 ms , the only real way to achieve any zoned trips are with rcbos . you can’t really have an (RCD) Residual Current Device socket for each appliance unless the...
  15. newfutile

    Struggling with Calculating Energy Usage on 3ph

    If your running all single phase loads then your approach would seem to be correct. is there not 3 phase meter to verify your calculations?
  16. newfutile

    Adjusting tripping time.

    I suppose you could have some type of reverse selectivity / discrimination by running it in over size cable and ocpd bigger than the supply , but the internal wiring would not be protected by say a 50amp mcb and the time current curves would still overlap. it also would not pass a fire risk...
  17. newfutile

    UK Static Type Shock Kitchen Water

    The sink is probably not an extraneous conductive part and probably does not require bonding to the met ,your electrician should have done an ir test on this to the met, he also should have checked ZE to determine the quality of the the main earth. do you have (RCD) Residual Current Device in...
  18. newfutile

    UK Static Type Shock Kitchen Water

    What does the shock feel like ? A static shock is short and sharp bit like a pin -----, a mains shock is like a buzzing a bit like when phone vibrates
  19. newfutile

    240v hoist wiring

    Is there not a danger in using buttons where both could be pressed at the same time?
  20. newfutile

    Click UK switch fuse

    You can see the terminals from the top, in any case work has asked me to address the issue,so I spilt some 16mm blind grommets with a bit of ct1 to keep in place

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