diversity | Page 6

diversity

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  1. M

    Maximum demand / diversity (commercial)

    In preparation of wiring up a commercial premises (function rooms / bars / restaurant area) I am trying to determine to what extent the existing 60A single phase supply might need upgrading. I have not had to do this myself for a commercial premises, and I am wondering if the same rules apply as...
  2. S

    Underfloor heating

    Pricing a rewire where they want underfloor heating, through out the whole gaff. This equates to over 70 amps. Is there a simple way to bring to demand down, like some how controlling that the upstairs and downstairs cycle seperatly etc
  3. J

    Diversity calculation check

    Hello all Would someone please cross check my calculations? Cooker induction HOB ONLY, oven is on a separate wall with seperate 6mm cable. 4x elements 1400, 1800, 1400, 1800=6400w total. 6400w / 240v=27A 27A-10A=17A 30% of 17A=5.1A 5.1A + 10A = 15.1A plus 5A socket =20.1 A total Note the...
  4. S

    Maximum demand & diversity

    Currently completing 2396 project (cant wait to see the back of it!!) Would just like to check im on the right wavelength when calculating max demand and diversity DB1 Maximum Demand & Diversity Lighting - 90% of total demand. Total demand of lighting circuits is 50.48amps. After...
  5. E

    double oven & halogen hob wiring

    Hi Guys, Here We Go With Another Post That Causes Many Different Opinions On the Forum. Been asked to do the wiring for a new fitted kitchen in the next few weeks, The work includes modifying the ring circuit to include a new 20A D.P switch for a dishwasher. The difference of opinons starts...
  6. H

    Shower & diversity

    Interested to hear people's thought around installation diversity when adding a 7kw (=> 30A) shower onto an installation with a 60A DNO cutout fuse - existing circuits include 30A socket ring, 30A cooker*, 15A immersion (rated 3kW => 13A), 5A lights (6 fittings @ 100W => 2.6A?); and on economy...
  7. J

    Maximum demand & Diversity lesson required please

    Hi, I am looking for a little advise on how to apply diversity and work out maximum demand on a new installation I am designing in a Cabin. Cabin CU has 3 circuits Circuit 1 6 Socket outlets - to supply 2.7KW Floor standing Hair dryer Electric Oil filled radiator Hand held hair dryer Kettle...
  8. H

    Application of Diversity - Standard Circuit Arrangements

    Hi there, this is a question I originally posted in the trainee sub forum which has been a little quiet of late. I know more traffic flows through here, so I'd be grateful for any corrections. In specific relation to the standard arrangements of final circuits in accordance with Appendix H in...
  9. H

    Application of Diversity

    In fact, in light of a recent thread I do have a question. There seems to be some conflicting information concerning the sequence to derive Ib. From a number of different online sources, actually. It has introduced an element of doubt, so I'd be grateful for confirmation and / or a correction...
  10. D

    Max demand and diversity

    Looking for some assistance here, been asked to calculate the max demand and diversity for the supply authority who are installing new main armour to a domestic building which I am rewiring. When calculating the max demand do I use current rating of the circuit breakers for the individual...
  11. M

    Diversity ?

    Hi can sombody please shed some light on this for me i cant get my head round the process ? this is the equation i've been given a 230v 12.5kw domestic cooker maximum demand current I=p/v =12500/230=54.35 i understand that bit but its this bit i dont get applying diversitiy first 10a of...
  12. J

    Cooker circuit info

    Hello all. I'll start by saying this is my first post. My name is John and I'm a maintenance engineer (electrical) from Scotland. Have found alot of cooker info on here but just to make surey My fully electric cooker is rated at 12925w and there is also a 45a fuse protecting and 6mm cable...
  13. Joe S

    Opinions on the load of this cooker circuit???

    I have been to look at a job tonight for a new oven to be installed. The circuit is a 6mm T&E with 32a MCB. The appliance end of the circuit has the Electric hob (5.7kw) wired into a Cooker connection point and it also has a spur in 2.5mm for the old oven which has been binned. They have bought...
  14. M

    Diversity on a larger scale

    Hi guys, I was just wondering if anyone would be able to help me in the right direction. I'm out in afghanistan working on 50hz systems and we are currently re-wiring a number of buildings (Including the sub mains). After applying diversity to each building we've calculated that a 3 phase 32a...
  15. 1Justin

    Constructive diversity calcs. - OSG method or just keep it reasonable?

    Diversity. How do you tend to justify domestic installations when you come across what seems to be really common 60A BS1361 supplier fuses, where it all looks too tight according to recommendations in OSG? Say we find 30A ring upstairs and 30A ring downstairs for starters. (plus 2 x lights...
  16. S

    thoughts on diversity for security lights

    Hi, installing 9 security lights around a building. 500w pir lights. I have split the lights into 2 separate circuits (4+5) wired back to the disboard. doing load calculations 500x5 = 2.5kw , 2500/240 10.41 amps so 16a mcb but I've wired in 1.5 t+e. I'm pretty certain all 5 lights would not...
  17. B

    fault calculation

    evening all i have come a cross a bit of 6.00 T+E to day feeding a range cooker backed up with a 50A breaker which I will derate as when diversity calculated will be fine.but it accured to me I had forgot how to calculate if the 50A would be OK from the disconection times side of things...
  18. Richard Burns

    How far can reality be allowed in diversity?

    Similar to the two showers thread, sorry. I have been asked to supply a sauna (4.5kW) and electric shower (7.5kw) lights and sockets (using an oil filled radiator) to an outside room. The supply is TNS, 80A (presumed) and the existing split board has 3 RFC, 3 light circuits, 1 immersion heater...
  19. M

    Diversity for electric combi boiler

    Hi all I am struggling to find any information on wether any diversity should be applied to an electric combi boiler circuit in a domestic dwelling, i was hoping someone could help me with this? Any help is much appreciated Mick
  20. S

    diversity on lighting circuit?

    Hi guys, was wondering if its acceptable to allow diversity to a lighting circuit. Customer has about 8 lights on the downstairs lighting circuit, but wants 12 spots putting into the kitchen. Now using the 100w per lighting point takes total current to 8.5A with all lights on at 100w. Now all...

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