Recent content by rich.250

  1. rich.250

    Back fusing

    Westward. This is in a intake room adjacent to the site transformer around 100m from the industrial unit and has restricted access. I have proved it will disconnect under the measure fault current by using 35mm insulated and sheathed cables to supply the new DB. The existing trunking will be...
  2. rich.250

    Back fusing

    Thanks for all the replies :) I thought it would be as a busbar system. The fact that I have proved it will disconnect quicker than the maximum time allowed by calculation doesn't mean that the cable will withstand said fault for 0.1seconds? How would I calculate withstand current of the...
  3. rich.250

    Back fusing

    I would give likes, but.......... Lol Sent from my iPhone using Tapatalk
  4. rich.250

    Back fusing

    I was thinking along the lines of a fault on the 2m cable inside the galv trunking. However slim it may be. Or am I over thinking this? Sent from my iPhone using Tapatalk
  5. rich.250

    Back fusing

    I have just re done my calcs, 35mm is very close but on the right side. Am I right with the following? Doubting myself now. T =kxs/ 11500 (All the above squared) So 13225 X 1225 = 16200625 / 132250000 = 0.1225 sec Information for fig 3a3c shows with 11,500 fault current the device will...
  6. rich.250

    Back fusing

    Hi Guys, We have an installation we are about to carry out some extras on. One of which is a small 3 phase DB adjacent to the main switch fuse in the remote DNO's building next to the transformer to install power to 3 caravan hook up points. (Max 20a per phase) Some background info, The...
  7. rich.250

    hob wiring

    He obviously lost the supplied links for the 230v set up..... As above it isn't safe or compliant. Name and shame! Sent from my iPhone using Tapatalk
  8. rich.250

    Thinking of ditching niceic

    I do agree with you also Andy. More emphasis needs to be put on the QS's who should ensure there staff are all qualified and working to a good level. Problem being it cheaper to have one muppet QS taking responsibility for a load of semi skilled...... Sent from my iPhone using Tapatalk
  9. rich.250

    Thinking of ditching niceic

    I don't see how the assessment is compatible between the two.... As an NICEIC approved contractor we have to show 5 different jobs picked by the assessor from ten. Not two circuits!! We get a lot of work from being NIC approved contractors and some of which I didn't have a clue that's why they...
  10. rich.250

    settle an argument please (bathroom zones)

    We always got mains fans in zone 1. Normally ip45. Same for ip65 mains voltage lighting. It's only zone 0 that specifies low voltage. Sent from my iPhone using Tapatalk
  11. rich.250

    EICR and smoke detectors

    Another so called spark who obviously shouldn't be doing EICR's. Sent from my iPhone using Tapatalk
  12. rich.250

    AM2 assessment

    One of my lads failed his AM2 first time because he didn't follow the lighting drawing. Which wanted the feed ran all the way round to switch 3, he just wired it shortest route..... If you took the feed to the light and the course is still the same I would say that was the main issue. Sent...
  13. rich.250

    10mm DI tails in henleys

    10mm tails are fine. 6mm would be adequate for the load. If it's a 63A rcd then in theory any self respecting installer would not put more than 20A on the spare anyway. If your concerned just put a max load label on the CU. Sent from my iPhone using Tapatalk
  14. rich.250

    Ferrule clamping

    This is what I use: http://www.swaonline.co.uk/cable-terminations/selektabox/selektabox-bootlace-ferrules Covers all your normal flex sizes, including every rcbo I have come across. Sent from my iPhone using Tapatalk
  15. rich.250

    Dodgy trade pictures for your amusement! - 1 Million Views!

    Sounds about spot on, Apart from the drop cable is a bit of SWA just stripped back and joined with 60amp choc blocks lol I looked at Pen conductors during the EICR but due to it saying that they cannot be used within an installation I disregarded it completely and assumed it was a massive...

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