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  1. E

    How to calculate the effect of ground Enhansing material (GEM) in Earthing

    How to Improve Resistance to Ground - Technical Articles - https://eepower.com/technical-articles/how-to-improve-resistance-to-ground/#
  2. E

    Extranous conductive parts

    I think it may depend on the ions present in tap water which may vary from area to area. Distilled water has no conductivity.
  3. E

    RCD Tripping times question

    Are they AC or Type A RCBOs ? Are you testing at the Distribution panel?
  4. E

    Extranous conductive parts

  5. E

    Installing RCBO-Surge Protector inside Meter Cupboard

    This video is worth a look . Not enough Space & heating up are 2 could reasons not to.
  6. E

    Does this look, feel, smell or sound right? - Categorising Observations

    Damage, deterioration, defects and conditions within the installation that give rise, or potentially give rise, to danger.
  7. E

    UK Selectivity : What does it mean specifically, especially in relation to EV chargers

    I think this is current .
  8. E

    R1 R2 Chestnut time again

    If you have measured all tests correctly on a ring final circuit & checked the r1 + r2 /4, you will have all the necessary check sums & measured results ( Ze, Zs Zdb) to fill out the cert. So whats the problem ! Maybe( R ) Stands for Radial !
  9. E

    Bathroom fan: do UK regs require connecting via lighting circuit?

    So are we expected to fit a fan & test the flow rate & notify the LBC with a cert or is this for larger ventilation systems. The regs are getting that mad that they have brought out Document O for overheating .🥱
  10. E

    electrical level 3 302 exam paper b

    Practice Exam Questions for Electrical Science and Principles - https://www.efixx.co.uk/Apprentice%20Hub/science-and-principles-practice-exam-questions
  11. E

    Bathroom fan: do UK regs require connecting via lighting circuit?

    Does this ventilation work come under Document F Now?
  12. E

    When electrics go wrong!!!

    Thought I would share this burnt-out Inverter that I discovered. The customer wondered why it had stopped generating! This was caused by water ingress & water pooling in the bottom causing a short between the grid connection 3 phases & which must have short-circuited the DC MC4 input before...
  13. IMG_2511 edited.jpg

    IMG_2511 edited.jpg

    • Electro-tech
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  14. E

    4mm for a 3.4kw oven?

    Below is cable calc for 25m Clipped direct.
  15. cable calc.PNG

    cable calc.PNG

    • Electro-tech
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  16. E

    SWA/SY cable in a fibre duct

    If you need Ip rated trunking, probably cost a Le Grand.
  17. E

    How to avoid overloading your inverter?

    If the inverter is grid-tied then surely the excess power needed would be supplied from the Grid. Depending on the make of inverter you may be able to view it from an app if necessary.
  18. E

    304 written exam mock test

    Maybe , not sure how current. Level 3 Electrical Installation Mock Test 4 (304) - Electrician Training - https://electriciantraining.co.uk/level-3-electrical-installation-mock-test-4-304/
  19. E

    Loading of an AC DB against selection regulations?

    Do you know what the overcurrent value of the 160A MCCB was set to, as this may be the downfall of the problems, thinking let's load the MCCB up more to stop tripping. Unfortunately, as you say no Diversity for AC in BS7671 so this leaves it to the engineer to decide the design.. I did come...
  20. E

    Cable calculation exercise

    This may be useful, also you can work out the Zs for the circuit to comply with the chosen OCProtection device impedance.

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