Maximum Demand

[jdmjrmdam]

I've been reading up on calculating maximum demand and I was wondering how often in practice a domestic installation ever has more than a 100amp single phase supply.

 

[Zeespark]

JD in the old Victorian houses you can sometimes still find that they have a 3 phase supply if you are lucky.

AndyGuinness

 

[Badger]

as we have our chrimbo lights all powered up for the next few weeks now during dark hours 5-11 i wouldnt be surprised if we where using nearly 100 amps :^O :^O

 

[SPECIAL LOCATION]

I've been reading up on calculating maximum demand and I was wondering how often in practice a domestic installation ever has more than a 100amp single phase supply.

VERY rarely!

 

[Lurch]

I've been reading up on calculating maximum demand and I was wondering how often in practice a domestic installation ever has more than a 100amp single phase supply.

I've only seen the odd few here and there. Generally, maximum demand on a domestic is whatever you want it to be, I've seen the same size houses with different arrangements of circuits, so one could be calculated at 60-80A and the other 150A. Just because you wire 5 ring mains doesn;t mean you will suddenly use more power than the identical neighbour who has only 2.

Dread to think what my house would come to if I calculated maximum demand by standing at the CU noting down circuits, think there were 20ish last time I looked. It was all happily sat on a 60\80A main fuse for years.

 

[Andy™]

unlikely to exceed 100A, unless there is electric heating/shower etc