Recent content by mhar

  1. M

    Acceptable departure?

    Thanks for the replies. It was the sort of question where you know the answer but was hoping that because an rcd was tripping on the 150mA test, that would be sufficient. It is one of those jobs turning a bit sour and just want to be done with it, will return there tomorrow
  2. M

    Acceptable departure?

    Been working at a large property with a tt system with a 100mA upfront rcd. Works undertaken in 2012 (inc 3 x split load cu replacements) were not documented and not done to an acceptable standard, I am encouraging the customer to seek redress. When testing my additions the 5 x trip test is...
  3. M

    Main fuse query

    New (WPD) domestic supplies are likely to be 3 phase their employees were informed last year
  4. M

    Testing during a consumer unit change

    I do similar ish. As a rough guide on a £350 board change I will agree a non-refundable £150 worth of testing, sufficient for me to be certain that I will not have any ir issues and that the circuits connected are continuous (RFCs) and cpcs on radials (Zs all points). Also look for borrowed...
  5. M

    earthing system?

    These are the max loop values used by WPD
  6. M

    Distance between Gas and Electric box caravan site

    There is (or was in 2011) a gas reg BS 6891:2005+A2:2008 Installation of low pressure gas pipework in domestic premises, clause 8.16.2 which states distances of 150mm from electricity meters etc. Maybe a good place to start looking
  7. M

    "MISSION IMPOSSIBLE

    SBS do a 12 module x 2 (2 rows of din rails) measuring 279w, 465h and 110d. Haven't used one but would imagine that having one rail for normal and one for off peak would be possible
  8. M

    2 x 10mm2 into socket terminals.

    .
  9. M

    Recommend me a small CU with DP MCBs / RCBOs

    Delaying the install to fit an SBS compact dp rcbo board is a decision you would not regret
  10. M

    255V measured instead of 240V

    Report it, they will send someone out to check and investigate as it is over (slightly) the max permissable. They are having big problems keeping the voltages down within the 216-253V window due to microgeneration so I have been told
  11. M

    Relationship between coax splitter and amplifier?

    The only way you can definitively tell is with a tv signal meter. Signal strength is less important than it used to be, quality is the important factor. Your 40% strength 100% quality is better than my 35% strength 100% quality but in the absence of accurate measurement from a meter, this can...
  12. M

    Main earth sizing

    16mm is the DNO requirement for a pme system. The 'scientific' calculation is the adiabatic equation but you need to know what the DNO ocpd is
  13. M

    Spur from 32MCB

    If you look at appendix 15 you will see that you can spur from the origin in 2.5 which will negate the need for a 20A mcb as you suggested in your post 7
  14. M

    Deta consumer unit

    Could someone please advise on a suitable replacement (or where I can source new) 3 x 20A mcbs
  15. M

    Interruptions on some Freeview Channels

    Look up 'digital uk 700MHz clearance' for updates for your main or local transmitter. There is a lot going on at the moment as uhf tv frequencies are being freed up for mobile phone use
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