Recent content by johnnyjb

  1. J

    Insulating ceiling - flat roof

    Thanks for the replies What about using rockwool (or sheets of foil backed kingspan foam) between joists instead of standard fiberglass rolls
  2. J

    Insulating ceiling - flat roof

    Hi i was wondering could some one help me with my query? I have a ground floor single story extension with a flat felt roof and want to insulate the inside ceiling. I was thinking of installing insluated slabs and plastering , but friends have told me that it is easier to put rolls of...
  3. J

    fireman switch

    Hi i know a fireman switch is usually located outside a building to disconnect high voltage lighting in case of a fire our other situations but could anybody give me other examples of when they are needed and what they are used to disconnect ... main supply for building??? ect.. Thanks
  4. J

    Economy 7

    Hi i was windering is there different types of economy 7.Some places i seen have a seperate board and some dont.Can you get economy 7 to supply all your house , apartment ect.. or is it just for the heating element of the premises or is it a bit of both ...
  5. J

    SWA into a consumer unit

    HI i was wondering what you people on here would find best when terminating an swa at a consumer unit , regarding the armour.
  6. J

    Day Night meters

    Thanks Lectrician Is there any specific reason why it is a neutral being switched
  7. J

    Day Night meters

    Any body got an answer for me?
  8. J

    Day Night meters

    Hi i was just wondering could any body shine a light on a query i have regarding the dual rate meters. Ive recently seen a meter room for apartments and was looking at the arrangement. Obviously enough there is the live neutral going through the day night meter but ther is also 3 x 1.5 mm...
  9. J

    Switch Rating

    Ok thanks gary and rf sorry bout the delay replying
  10. J

    Switch Rating

    Hi , i was looking at the back of some plastic roker switches at work and the writing on the switch said 10 ax . It was obviously a 10 amp switch but what did the x represent. I thought it might be for inductive loads. Ive never seen a switch give its inductive rating, ive seen it on an APT...
  11. J

    consumer unit connections

    Great to see the same people i had an 'arguement' with last week are still hitting the headlines. Grow up its a diy forum,if you wanna be superman register with a more professional site and suck your thumbs.
  12. J

    impedance values

    This forum is good but some arrogant know alls surface now and again and think that their post count in their profile allows them the right to be smart and it really annoy me. This is getting off topic.
  13. J

    impedance values

    Ban All sheds as usual being snotty , not answering a question and trying to humiliate a poster. If you went to the effort of replying why didnt you answer the question instead of pointing out how badly the post was worded.Too much free time
  14. J

    impedance values

    Is it that if theloop tester gives a reading over 80 percent than a more precise measurement needs to be done or is it over 80 if manually measured
  15. J

    impedance values

    Hi im a small bit confused about finding the values of the loop impedance of an installation. I fully understand the path of the loop and all that but im stuck on the temperature factors to be applied. If you use a loop impedance tester , is the value displayed the correct value or do you...
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