Maximum Demand

PeterPan27 · Mar 24, 2013

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

Knobhead · Mar 24, 2013

76.8A. As to how, it's in the books you're supposed to read.

GLENNSPARK · Mar 24, 2013

PeterPan27 said:
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

yes...i want a large cake....all to myself....

PeterPan27 · Mar 24, 2013

thanks for the demand mate.

could you give me the calculation so i can try work some other things out.. al my books are in collge and were off for 2 weeks,jst trying to work some stuff out,
thanks again

Tony said:
76.8A. As to how, it's in the books you're supposed to read.

Knobhead · Mar 24, 2013

If max demand ever get any where near the calculated figure, the UK power network will explode!

Knobhead · Mar 24, 2013

PeterPan27 said:
thanks for the demand mate.

could you give me the calculation so i can try work some other things out.. al my books are in collge and were off for 2 weeks,jst trying to work some stuff out,
thanks again

Glenn, you forgot the cream on his cake!

PeterPan27 · Mar 24, 2013

im sory if you think ive insulted you or something by asking a question!! just trying to work few things out while im off.

PeterPan27 · Mar 24, 2013

i was told you take the highest ( in this case the shower 40 amp)
then add all the rest up
then x then by 0.4
then add to 2 figures together??

so this case would be 83.2Amp

Engineer54 · Mar 24, 2013

Using my own method of calculating maximum demand, i got closer to 60A!! And if that installation ever got to see anywhere near 2/3rds of that 60A for more than a few minutes it'll be doing well!! lol!!

PeterPan27 · Mar 24, 2013

Ye i understand that it wont be anywhere ner that,, just wanted to know the calcution, as the calculation i was using to get 83.2A was from a very knowledgable forum member

Engineer54 said:
Using my own method of calculating maximum demand, i got closer to 60A!! And if that installation ever got to see anywhere near 2/3rds of that 60A for more than a few minutes it'll be doing well!! lol!!

Knobhead · Mar 24, 2013

To give you an idea of MD. I ran my flat on a 16A MCB for a week as a trial. If I didn't use the kettle so much I'd get away with a 6A.

Engineer54 · Mar 24, 2013

If this is for a C&G collage course work, then you'll have to use those methods stated in BS7671. Crazy i know, but if you don't you'll probably fail!! lol!!

PeterPan27 · Mar 24, 2013

ive got the regs here , the only book i got at home but cant find no cals for max demand in it

Engineer54 said:
If this is for a C&G collage course work, then you'll have to use those methods stated in BS7671. Crazy i know, but if you don't you'll probably fail!! lol!!