demand | Page 5

demand

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  1. 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...
  2. S

    MAXIMUM DEMAND... nic assessment

    hi guys. if i calculate maximum demand like i got 6 circuit 32a cooker 32a upstairs ring 32a down s. ring 20a,radial 6a upstairs light 6a down stairs light get the higgest one and add the rest together get 40% of it and finally add to highest one.. do u thing is that right?? and also do...
  3. J

    maximum demand

    Hi guys having been out of college for 4 years some of my knowledge was left there I think :eek: Looking to do a few maximum demand calc's but I'm insure where to start. I know all about maximum demand and diversity, just the calculation and formula I'm lacking. Commercial property ze = 0.055...
  4. 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...
  5. S

    maximum demand

    Hi when filling out a e.i.c. and it asks for maximum demand, is that the size of cut out fuse or does it mean working out all loads on circuits using diversity,shows what 2 yrs at college taught us.
  6. B

    meter tails and cut out fuse

    Hi people, I recently installed a cooker circuit in a property. The CU has 16mm meter tails supplying it with a 60A cut out fuse. I have read various opinions on this but: Should the meter tails be changed to 25mm even on a 60A fuse - in which case the fuse is not protecting the tails? or...
  7. L

    EICR meter tails coding

    Can anyone give me some advice on coding I recently carried out a EICR on a Commercial premises (communal areas of a block of flats) 3 x DB's all single phase with incoming 3 phase supply with 100A type 2 b fuses with 16mm tails going to each DB - personally I warrant this a code 2 any thoughts...
  8. A

    9kw electric Boiler and max demand

    Sorry to bring this up, I've searched through some of the old stuff, but would like a bit of reassurance... Been asked to install a 9KW electric boiler with immersion circuit for the cylinder. I couldn't see the main cut out as it was beleive to be in a different flat, so of course I will need...
  9. A

    maximum demand

    when working out the maximum demand am I right that it should be below 100A Just working one out on a job and find the lighting comes to 4.5A cooker comes to 22.5A (no cooker there to check actual consumption so assumed 8000w) shower comes to 38A and the power is 58A assuming i have worked it...
  10. HappyHippyDad

    A small panic about maximum demand!

    Hello all, I will be getting assessed very, very soon now! I’ve completed the consumer unit change and am just having a bit of a panic as I’ve worked out the maximum demand and it exceeds the supply fuse by quite a bit. I realise the assessor is not likely to questions my figures so I could...
  11. A

    Advice on mains

    Hi guys, Just after some pointers. Looking to update fuseboard to my sisters property, needed a d/p isolator that was installed, and electricity board said main service head is porcelin and will need changing or new supply to propery as the original supply is looped from next door. most likely...
  12. P

    how do you work out maxium demand

    can you show me how to work out maxium demand on a lighting circuit with ten lights on the circuit please
  13. P

    maximum demand

    guys need a little advice i am asked to supply a new lighting circuit to a small comercial property the property is supplyed by a single phase /100 amp main fuse/ this runs to a small 4 way fuse board with x 4, 40 amp fuses in wich in turn supplys 4 loads ,1x 40 amp load 1x 40 amp load 1 x...
  14. J

    Max demand problem

    First post - be gentle. Just changed a consumer unit and am struggling with the "max demand" bit on the paperwork. RCD is 100A, Main fuse is 100A, it has 2 showers (50 A each) no diversity allowed on showers. so, um, not much room for anything else. .....or am I being a moron? Thanks Jim
  15. H

    Max Demand

    Hi all just got quick question 60 A Main service fuse total house rewire worked out tat Max demand using x 0.4 will be 64.8 A just wondering if it might be worth giving DNO a ring to see if its possible to upgrade to 80 A main fuse is it worth ringing?
  16. S

    Supply and demand. Is a 300A head enough?

    Hi guys, I have been asked to price up a job thats a little outside of what I generally do and im hoping to get some advice from you sparks who are more experienced in the design of an installation. Iv got a block that an investor is converting to 24 studio flats, all electric, no gas. 3...
  17. S

    Max demand on a unit

    Guys, I have been asked to calculate the maximum demand for a DNO who want the information before upgrading the metering to 3 phase. The client has 3 phase coming in to the building but only single phase meter. The building is a small commercial warehouse unit (4m x 6M) with some upstairs and...
  18. S

    Maximum demand

    Still at work as I'm doing this post come across a 80amp kmf 16 mm mains t&e on a 4 bed hse 15mtrs long clipped direct no insulation round it to db. Anyone want to work it out?
  19. L

    Tail sizes - max demand suggests too small

    Fellas Im just writing up the 5 flats I inspected last week, all the service heads/fuses are new to within 3 years, the cut out fuses are all 100A and tails all 16mm, I know discretion is sometimes needed in this area, on some flats the Max demand reaches 90-100A whilst in others 65-75A, would...
  20. D

    after diversity maximum demand

    I have been asked by the DNO to give the ADMD figures for a building that is being converted in to 8 flats in conjunction with electric power and gas heating. I have looked everywhere for a ADMD meaning but cant find one, has anyone ever heard of this??? Cheers, Debs (yes female electrician)

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