diversity | Page 10

diversity

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  1. M

    maximum demand and diversity

    hi, Ive recently fitted a new CU to my house ready for assesment (Elecsa 14th dec). Just wanted to know if I had worked out MD + D correctly cheers. Hi integrity dual RCD board. LAYOUT AS FOLLOWS. 100A MAIN INCOMER 6A RCBO SMOKE ALARM MINUS 40% = 2.4A 6A RCBO SECURITY...
  2. E

    OSG pg 160.Cooker circuits in household and similiar premises. 8.4

    Hi all with respect to the above ref from the 17th OSG. Could someone explain how "a 30 or 32 A circuit is usually appropiate for household or similiar cookers of rating up to 15kW". is the key in the words " rating of 15kW" , in that its not a 15kW load?? using i=p/v amps would be around...
  3. M

    Max Demand and Diversity

    in determining Maximum Demand and Diversity may be applied, which is a. Taking the sum of protective devices from any CCU b. Taking into account that not all loads will be switched on at the same time c. Taking into account that all loads doubtless will be engaged simultaneously d. Ensuring...
  4. J

    Diversity question

    Hi all just got a little diveristy problem im scraching my head on and wondered if someone might be able to help. New block of 4 holiday/ bed and breakfast challais (excuse spelling) each challais will have: low energy lighting throughout about 170 watts in total each 4 double sockets...
  5. K

    RCD Diversity?

    Hi All Newbie so be gentle on me. I'm training to be a spark at the moment (early stages) and have a simple question on diversity. I know you can use diversity in regards to overcurrent protection but can you also apply to diversity to RCDs? Was in B&Q walking round and noticed a massive...
  6. C

    Main D/P Switch size??

    Hi all Looked at a job today and the customer is adding quite a bit onto a bungalow with 2 new extensions.My ? is, will a 100amp main switch be big enough? the new d/b will consist of: 3 x shower circuits, all showers are 10.5 kw 4 x rings 1 x water heater 4 x lighting 1 x heating
  7. sythai

    Cooker diversity advice please...

    I dont normally allow for diversity, I just install allowing for maximum demand. But I've been doing a few calculations and it would help me if I now brought it into the equation. I seem to be doing a lot of kitchens lately an end up having to pop back once worktops come (usually a week after...
  8. A

    Applying diversity?

    I'm going to be wiring an extension(3 floors) to a retail unit which will need a new supply as the demand is quite high already(high 80's on all phases through the day). Anyway I've totaled up the loads for each floor into Lighting and Power and Storage Heating but I'm not too sure how to apply...
  9. N

    A Question of Diversity

    I have been asked to install 5 hand dryers in a club type environment. (3 in one room, 1 each in two adjecent rooms) I've been looking at some of the automatic types which recon to run for 15 sec but I would have thought 30sec more appropriate, and I would guess the period between use, at the...
  10. D

    Diversity and max load

    I done some calculations regarding diversity for max load and also determine my main switch rating for my board.... can someone tell me if i done my calculations right... i have trouble getting my head round this, got my ELECSA assessment coming up, want to make sure im not getting things...
  11. swparksey

    Diversity

    Having spend my life in an industrial maintenance roll I seem to have forgotten all I learned, could somebody help me on this one. Its a new build and I am looking at the demand, where am I going wrong. Diversity for total demand Curcuit MCB Upstairs Ring...
  12. B

    Diversity

    how do, wondered if any one can help me to understand diversity, had this question on a revision paper, n wont get get chance to ask the tutor till next week A domestic cooker rated at a maximum load of 60A is controlled by a ccu which DOES NOT contain a 13A socket outlet. After allowing for...
  13. M

    RCD Calculations

    Hi All, I would be very gratefull if anyone can clarify the correct method to calculate correct rating of RCDs, as I have read numerous threads which seem to differ. I have just completed my Level 2 C&G 2330 and understand the cable calcs, but haven't asked my tutor this question yet. Here's...
  14. G

    Cooker Circuit and Diversity

    Hi All, Please can somebody confirm my thoughts. I have to install a cooker cct. I have chosen 6mm cable. The load is 8Kw. ie 35amps My calc involves 10amp +30 % remainder fl + 5amps for the socket, from Diversity, table 1A OSG 17th edition page 97 ie 10+(30% of 25)+5...
  15. L

    Diversity issue

    I have a client who wants me to install more than your normal stuff in a new built garage but looking at his mains board in house he is already on his limits here's my findings and calculations please correct me if Iam wrong existing mains board 6 x 6amp lighting = 36amp after diversity...

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