demand

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  1. Y

    Design course max demand question

    Hi all, I appreciate this has probably being posted time and time again, but I'm using my phone and the search threads button isn't working. Basically I'm just starting my design course (2396) project and I'm on with working out the max demand and diversity, basically I've split the job up and...
  2. delano

    maximum demand

    Is there an accepted rule of thumb formula for maximum demand?
  3. SJD

    Upgrading domestic supply (60A to 80 or 100A)

    For SSE DNO area, if a customer was to request an upgrade of supply from 60A to 80A (or 100A), does anyone know if SSE normally make a charge for doing this? Background: TN-S supply (Ze = 0.27 Ohm), late 1960's Bakelite-looking head which appears in good condition, mixture of 16 and 25mm2...
  4. A

    Maximum demand

    Hi guys, I'm looking to install a sub board to feed 4x 8.5kw shower circuits and 2x 2 ring 3kw hob circuits (4x32amp MCB's and 2x16amp MCB's). What would be the best method to work out the maximum demand? I get 83amps. Many thanks in advance.
  5. S

    3 phase advice

    Hi, i require a little advice. 3 phase supply (100A per phase) from energy meter into 3 phase switched fuse isolator, then swa off to D.B 20 metres away. Distribution board feeds office equipment only. I need to install a supply for a 36kw 3p machine, which is going to be situated next to...
  6. 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...
  7. 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...
    • SafetyEICR
    • Thread
    • demand diversity maximum
    • Replies: 14
    • Forum: UK Electrical Forum
  8. kkkkk

    New Zealand Insurance company demand proof of credentials

    Hi all There is a commercial complex that I am inspecting, testing and certificating, and doing any necessary remedial work. I have now got my client's insurance company demanding my credentials regarding being NICEIC registered (I am registered with one of the others), and that I have to prove...
    • kkkkk
    • Thread
    • anything being company demand insurance proof prove registered
    • Replies: 27
    • Forum: UK Electrical Forum
  9. bartkusal

    Block of flats. Max Demand

    Wonder if I can get some guidance, on max demand in block of flats. It always was hard for me as it always comes to massive demands, and I red here that it all comes with years of experience and that it is like an art. This is first bigger project I am taking on. So please don’t shoot. I need...
  10. J

    Problems with Maximum Demand figure

    Hi guys I'm after a bit of help with working out my Max Demand normally in a domestic situation its fine but theres so many heaters and water heaters on this that I'm a bit confused. I have been asked to do a bit of commercial installation for a kitchen and toilets its a children's soft play...
    • Jon Hodgson
    • Thread
    • demand figure maximum problems
    • Replies: 20
    • Forum: UK Electrical Forum
  11. M

    Working out Maximum Demand.

    Hello all. As above. There seems to be much confusion on the subject and working it out "accurately". Thanks Matt
    • Matt Winslade
    • Thread
    • breaker demand domestic electrical work maximum number out using working
    • Replies: 7
    • Forum: UK Electrical Forum
  12. M

    Voltage drop

    Is there a voltage drop from DNO transformer to incoming supply? For a standard 100A supply to a house so they design cable to with stand no VD as so at maximum demand there will be no VD. It is then up to us to design circuits as to have as little as possible so that 230v remains everywhere. Of...
  13. W

    once again maximun demand sorry!

    Hi all, sorry to bring this up again but I cant quite find the answer I need for an assessment As part of a rewire the ground floor has 20 double 13amp sockets but 9 of these are in the kitchen. I have been told the kitchen is drawing sockets will have: 13.3 amps from a washer dryer 13.3 amps...
  14. P

    Maximum Demand

    Can someone help me work out a max demand got a 40amp shower 32 amp cooker 16 amp radial 16 amp radial 32 amp ring 6 amp lighting 6 amp lighting whats the calculation to work out max demand please
  15. 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...
    • Joe Hyde
    • Thread
    • demand diversity maximum please required
    • Replies: 11
    • Forum: UK Electrical Forum
  16. 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...
    • Scorpion90
    • Thread
    • answer assessment basic demand maximum
    • Replies: 11
    • Forum: UK Electrical Forum
  17. 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...
  18. 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...
  19. 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.
  20. 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...
    • bonn1ett
    • Thread
    • cable change demand fuse meter meter tails out tails
    • Replies: 15
    • Forum: UK Electrical Forum

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