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  1. M

    Separating PME & TT earthing for outbuildings

    I believe others have used a standard plastic stuffing gland to isolate the amour from SWA, I guess as long as it grips & supports the cable and you cannot access exposed conductive parts from each earthing system at the same time (411.3.1.2) then all is ok
  2. M

    Separating PME & TT earthing for outbuildings

    In its current configuration, the earth rod is classed as an extraneous conductive part as currently the PME earth is in use at the workshop. However you want to isolate the PME earth and change to TT, in that case the earth rod will become the earth electrode for the workshop TT system.
  3. M

    Separating PME & TT earthing for outbuildings

    That make TT easier then, H Wouldn't it be main bonding
  4. IMG_20210412_175327183_1.jpg

    IMG_20210412_175327183_1.jpg

    • marcuswareham
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  5. M

    Separating PME & TT earthing for outbuildings

    Although you say currently you have an earth rod connected to the PME earth at the workshop, this earth rod could be counted as an extraneous conductive part, if you were to leave it this way with that earth there would need to be a minimum of a 10mm conductor connecting that earth rod to...
  6. M

    Separating PME & TT earthing for outbuildings

    The minimum size for a bonding conductors with a PME supply is 10mm see Reg 544.1.1 & table 54.8 I believe this is todo with high current under PEN fault conditions and the potential for diverted neutral currents
  7. M

    Separating PME & TT earthing for outbuildings

    It is up to the designer to assess the risks associated with a broken PEN conductor, and then put mitigation in place to reduce the risk, if the risks are unacceptable. One way of mitigating against a broken PEN conductor risk is by making the outbuilding TT, although this is not as simple as...
  8. M

    Separating PME & TT earthing for outbuildings

    There could be other extraneous conductive parts we don't know about, do you mean do the calculation for the earth rod and cable coming into the building or for the conductivity of the floor A cable coming to a building connected to an earth rod in the ground surely would obviously bring an...
  9. M

    What earthing arrangement would you use

    The situation is: Power is needed inside a greenhouse to power a specialized greenhouse heater, a timed motorized window opener and a light. The lights can be double insulated but the heater and windows device are both class 1. The greenhouse has a metal frame that is in good contact with...
  10. M

    Separating PME & TT earthing for outbuildings

    In theory both buildings could use the PME earth instead of TT, if you remove the rod at the workshop then there is no extraneous conductive parts at either building so no need for 10mm bonding conductor back to the house. Although a lot of people would favour the option I just mentioned, I...
  11. M

    What connector is this?

    Iv just noticed it says "Bulgin England" on it, first time i read that i could have sworn it said "made in England" now i feel silly ?
  12. M

    What connector is this?

    Perfect thank you very much, i get free delivery from farnell also so thats easy
  13. M

    What connector is this?

    Its powering a bit of bespoke made equipment for a theatre, one of the solder lugs inside the connector has broken, unfortunately there is no space to fit a more standard IEC connector on the equipment, I was going to suggest a stuffing gland and a bit of flex with a plug on, but owner...
  14. M

    What connector is this?

    In fact I think i might have just found one on ebay
  15. M

    What connector is this?

    Does anyone know what connector this is and where one could be sourced from, think its from around 1970s (Before me) Thanks
  16. IMG_20210411_154922193.jpg

    IMG_20210411_154922193.jpg

    • marcuswareham
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  17. IMG_20210411_154924690.jpg

    IMG_20210411_154924690.jpg

    • marcuswareham
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  18. IMG_20210411_154942866.jpg

    IMG_20210411_154942866.jpg

    • marcuswareham
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  19. M

    Basic question on Phase 3 / Phase 1

    You can also get smaller DMX dimmers such like: https://www.amazon.co.uk/qtx-DP4-4-Channel-DMX-Dimmer/dp/B004CYVZAE&ved=2ahUKEwjl9rWHre7vAhWjhf0HHVKxAeQQFjABegQIBhAC&usg=AOvVaw2caf86m82WFcZiQQCt61j0&cshid=1617874771938 The power input is a standard IEC so a 13A "kettle lead" can power it...
  20. M

    Basic question on Phase 3 / Phase 1

    What sizes is the red connector, it should say an amp rating on the side (16A, 32A, 63A or 125A) You can buy ready made adaptors like this: https://www.essentialsupplies.co.uk/16a-230v-plug-to-16a-415v-socket.html Changing the connector on the dimmer pack for one suitable for your...

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