demand | Page 6

demand

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  1. A

    Typical Max. demand for a medium commercial premises?

    I'm doing my 2396 design project, and would like some clues about typical commercial installations, and their maximum demand and incomers. Its a large Argos style shop, I've got the max. demand at 500Amps, that could probably come down to around 400 or so with diversity, that'd give me a TP-N...
  2. J

    EPC's a farce for remote areas where Solar PV helps the most!

    Any one agree? We installed 25 systems in the Isles of Scilly over a 3 month period, huge demand and interest in a small place that has an increasing problem with high demand but limited infrastructure, but no mains gas so no condensing boilers so no EPC rating of even 40! Bloody sad
  3. I

    existing electric shower re max demand

    hi i have a 60 amp main fuse supplying 63a main switch in cu. my question is about OSG table 1b max demand figures (calculations). When applying these figures ie no diversity for shower, no diversity for first ring main it seems that any installation with a 60a main fuse cannot have a electric...
  4. I

    Am i wrongly calculating my maximum demand?

    Hi guys i calculating my expected maximum demand for an installation to see if the 60A cut out will handle it. heres what will go in and calculations incl diversity 2X 32A Rings, so 32A(first ring) + 12.8A (40% all others) 1X 6A lighting, so 4A (66%) 1X10A lighting, so 7A 1X32A Shower, so 32A...
  5. C

    RCD Rating

    Can someone please explain to me how the Rating of RCD work because I've read on different forums that you can not exceed the rating of the RCD ie 63A or 80A if that's the case why do C.U like 10 way dual RCD, have a total MCB rating of 218 A if all MCB was used and only 143 total A for the...
  6. SibertSolar

    MC3/MC4 adaptor cables - any demand?

    Hi all, I realise that the use of MC3 connectors is pretty much non-existent anymore but are there those out there that would be interested in short (100mm, 4mm2 PV wire) lengths of pre-terminated MC3 to MC4 adaptor cables? I'm toying with the idea of putting some on our shelves. Selling...
  7. S

    New assumed Current Demand of Installation

    OMG!! can somebody please point me in the right direction because i am sure that i am looking in the wrong section of the REGS book... here is my question... Explain with reasons the New Assumed Current Demand of the Installation? My answer is this... For economic and reliable design, the...
  8. E

    Cut-out fuse shared by 2 properties

    Hi All, Been to look at a job, where customer wants to install 9.5kw shower. 3 Bed 2 storey flat. Calculating the load on board at present with diversity comes out at 68.8A, if the shower was added calculations came to 94.6A. Looking in the meter cupboard, the supply splits to 2 meters after...
  9. K

    max demand cooker and heating system

    morning everyone could someone please help me on calculating max demand on a cooker ran off 6mm t&e off 40amp mcb, the cookers kw unknown but its older than grass!! also an old fashioned heating system ran off 2.5 t&e off a 16a mcb which circulates hot air through vents throughout the house...
  10. W

    Help! Max Demand KvA

    Hi, I am in the process of having a new connection installed, At the moment ours is a shared supply. I have calculated the load to be @ 300a overall. I would like to know what size supply I should be asking the DNO for. 3 phase or single phase, the latter would mean extra work though. Your...
  11. 1

    What's the highest you've recorded for a 100A fuse?

    Yes Maximum Demand again lol I just tried to make the title a little more curious to get people to look ;) Just playing with some maximum demand figures, started with 226A and got it down to 104.65A Just wondering what id the highest figure you have recorded for a 100A fuse? Is it actually...
  12. L

    Confused, can anyone shed some light?

    Hey, been to look at a job this evening its not your standard S, Y or Combi system. The plumbers gone in and only changed the boiler but disconnected all the cables to it. Scenario: Boiler, with pump above it, basic programmer (HW ON, CH ON) Then in the airing cupboard theirs one 2port valve...
  13. D

    Does a 3kw immersion heater demand 2.5mm cable?

    And if so, if a 30A relay is being used to switch power to the element, does the supply to the relay need to be 2.5mm as well?
  14. edexlab

    Max demand calcs for Farms

    I need a bit of advice from anyone who has experience of assessing the maximum demand on a farm ie what diversity values and any calculation methods to assess demand for example does the 0.4 figure give realistic numbers The actual circuit loading is quite low for much of the time however they...
  15. A

    Maxim demand Q's again

    Hi All, im new to the forum, ive often browsed various threads with great interest... I know there's been a fair bit said on this subject so sorry for bringing it up again, im in the process of a timber frame new build ( 2 bed, 1 study/poss bed 3 ) When working out the maximum demand as p96/7...
  16. C

    Max Demand Blown Out of the Window!!

    I'm working on a house that has no gas or oil, and it would not be easy to get bottled gas to it. So here is my problem, the client wants everything electric. So in his ideal world that would be: 2 x 9.6kW Instant water heaters 1 x Reasonable electric shower, say 8.5kW 1 x electric hob 1 x...
  17. S

    Demand Factor 'v' Diversity Factor - which is your preferred method

    Gents, I'm applying for CEng through the CIBSE TRR route, my chosen subject determining maximum demands within commercial properties. I've been reading through some of the previous threads concerning manximum demand calculations and note almost everybody has a completely different approach...
  18. A

    Are PV panels cost effective to instal & run?

    ok I design house extensions, one of my clients just fitted 16 PV panels to their south facing roof in Somerset. Today at 2pm blazing sun, the elec meter seemed static. She turned the elec immersion heater on and the meter started moving forwards reasonably quickly, she turned it off and the...
  19. M

    max demand at petrol pump

    Hi was called out earlier as a client has been asked by supplier to confirm KvA in order for him to downgrade meter as he feels he is paying a rate which is too high. (Dont ask me why, but if one of you guys know then please let me know too) I had a look at supply and its a three phase supply...
  20. L

    Max Demand calc for new supply

    HI Guys I have a 8 flats and 2 retail units due to be built soon and i am trying to work out the Maximum demand for each of the flats and the 2 shops so the supplier can ensure a large enough mains supply. The Retail units are to just have a supply to a distribution board, the shop is not too...

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