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diversity

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  1. OnlQQker

    Trying To Understand Diversity

    I'm trying to understand diversity a bit more. Someone, somewhere done a calculation to determine how much use the circuits would be undergoing at any one time. But what if somebody moved into a flat/house and didn't care how much it cost and just run everything all at once. I know this rarely...
  2. J

    Diversity Factors

    Hello people, I'm designing switchgear for a residential estate, of about 60 houses, specifically the protection for the incomer. Is there any provision in the British Standard that advises on diversity for such a large number of household units?
  3. stuarth

    Max demand & diversity advice needed

    I have been asked to do some work on a large 25 room mini mansion spread over 3 old properties made in to 1 with 6 consumer units on a single phase 100amp supply. The total loading of the breakers is 452 amps if I apply diversity at 40% I arrive at 180.8amps demand but this dose not take in to...
  4. James

    Diversity

    Good morning, Just trying to get my head round a diversity issue. Will be a new board fed from a panel board adj transformer Have to feed 3 machines Machine 1 140kw Machine 2 80kw Machine 3 80 kw They are production machines (lathes) so will be in use at the same time but the ratings given...
  5. ThatMatt72

    UK Can't get within maximum load when applying diversity

    Hi all, I wonder if you might chuck in your 10 cents worth on this on? I have been asked to install electric heating in an office up on the 4th floor of a building. I've looked at the layout of the room, with regards of seating etc and after consulting with the occupiers have decided on the...
  6. Y

    Q6 Demand and Diversity

    hi I am doing level 3 . I need help in Q6 How I can find the demand and Diversity Thanks
  7. 4

    Oven / Cooker Hob Diversity Question

    Hi, I would appreciate some views on the following issue I have. The Cooker radial in a house has been wired in 2.5mm T&E, to save the expense of a larger cable. Without boring with the detail, I cannot pull out and replace the existing cable, nor wire in a new 32A circuit using another...
  8. S

    Question about diversity calcs

    hi all, Looking for some advice on the main fuse for a property I’m developing. It’s going to have 6/7 studio rooms, all with microwaves and potentially a hob. Set over 3 floors if I were to have a separate light circuit for each of the 7 rooms at 3amps per room, that’s 21amps at full...
  9. G

    Volt drop Question SWA

    Hello All, I’ve been asked to install a cable 170m in SWA, this is to be pulled through ducting. The cable is straight from the meter to an isolator in a beach hut. As the property is so small with little electrical appliances, I have accounted for 45A max current and deduced a 35mm2 SWA. Is...
  10. C

    Diversity applied, max load well over.

    Seen a couple of threads on diversity and excessive max loads recently. Just had a design from a clients for their house. Applied diversity is 196A. Having 2 9kW showers install, A 4kW instant water heater, a cinema room, ring main per floor, lighting circuit per floor and ring main for...
  11. L

    Heat pump diversity calculation question

    Hi, When calculating diversity. Does external air conditioning equipment such as heat pumps fall under heating and power in the osg such that you take 100% of the highest then 75% of the remainder? Thanks
  12. L

    Diversity allowance on sockets based on OSG

    Hi, Reading the on-site guide it’s states for socket outlets appendix A table A2 row 9 that 32A ring sockets in an office it can be 100% of the largest circuit and then 50% of the remaining circuits. However I have came across a calculation were the original designer has assumed that they know...
  13. dc-electrix

    Maximum demand and diversity electric flat

    Hi All, Making some alterations in an existing flat and scratching my head about required supply to flat. It is all electric, 1 bed, 1 bathroom. Electric shower 9.5kw Instantaneous Water Heater 9.5Kw Cooker Oven & Hob 6Kw 1 Ring main 3 Electric Heaters...
  14. Bobby34

    Designing with diversity on sockets

    Could somebody put into lamens terms for me what the diversity is on final circuits (sockets) as per table A2 in the OSG. It reads: "100% of current demand of largest circuit +40% of current demand of every other circuit". Does "largest circuit" mean longest length, most sockets, or biggest...
  15. G

    Loft conversion sub main & diversity

    Hi all, I am currently having a loft conversion completed and want to put in its own board in the loft. The main reason for this is if in the future, I want to let it out as a self contained unit, it will be much easier. The conversion will initially have a ring main 32 amp and a lighting...
  16. A

    Hob and cooker diversity

    hi guys I’m a qualified industrial maintenance elec although not been on the tools for a couple of years. I’m looking on rewiring my home I’ve just moved into. I have been reading up a lot on the regs etc as domestic isn’t my field. Ideally I want to keep the kitchen as it is as it the Only...
  17. Baddegg

    Diversity calls check please........

    15.2kw range cooker has already been installed and a 10mm t&e run back to the Cu via this switch,(havnt seen cable route yet but I’m told on the phone it’s all in trunking and doesn’t pass through any insulation but will check this)apparently the previous spark that won’t connect it to the Cu...
  18. GBDamo

    Diversity Question......

    Doesn't really matter as I have spare capacity and VD well within limits but I have a sub board fed with 10mm SWA.The sub supplies a 32A socket ring, 6A lights and a 20A radial to a 16A switched commando serving a 10A fixed load motor. All single phase 230V. Which would you calculate the...
  19. 2

    Cooker - diversity. A second opinion would be nice

    6mm to kitchen. Separate hob and oven. Rating combined just under 13000w Am I right in applying diversity and the two appliances sharing the same supply. 45a dp switch off to two ccu's 32amp mcb 60898 6mm supply cable T.i.a
  20. M

    Help with Farm/Light industry diversity

    Hi There, Moving into deeper waters & needing a little assistance with calculating maximum demand/diversity on a farm/light industrial site planning to upgrade to 3 phase, add a car repair workshop, 63A events socket & allow for future proofing. Current single phase setup: Diversity for...

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