max demand

[scott 123]

went to domestic job today where max demand was 236A (around 175A after diversity) main fuse is 100A so demand seems high to me...just wondered when you design what demand do you go to

 

[DPG]

Depends what's plugged in. Daz

 

[Plonker 3]

Sssshhh, trying to see if the OP could work that out.

 

[scott 123]

Or how many extension leads are plugged in

 

[DPG]

Sorry dillb. Thought you were having a blonde moment. Lol. Daz

 

[Andy78]

Or how many extension leads are plugged in

Because multiple appliances plugged into a 4 gang extension lead fitted with a 13A fuse can draw 4 times as much as a single appliance fitted with a 13A fuse right ?

 

[atm84]

Can't be bothered reading all the previous posts but DNO's allow 2KW per average domestic dwelling. That's not even 9 amps.

 

[jimjimjim]

Can't be bothered reading all the previous posts but DNO's allow 2KW per average domestic dwelling. That's not even 9 amps.

Yeah, but it doesn't stop someone pulling ten times that.

Jim

 

[jaypp]

Here's a example for you

If a 32 amp radial had 2 single sockets on it, and another 32 amp radial has 12 single sockets on it which one is the bigger load?

12 single sockets are much heavier than 2, so I'm going to say 12!
Re. thread, it'll be fine and you've got to think the designer knows it will. E.g for starters you can pretty much ignore what the smokes pull!

 

[DPG]

Ha ha never noticed that - 6A for a couple of smoke detectors! Brill. Daz

 

[trev]

I just took a look at an Aico smoke I'm installing at the weekend. 0.8w. Now I'm putting 2 in so that's 1.6w, so 1.6/240= 0.006 (recurring) amps so let's call it 0.007.
I just saved you 5.993 amps mate

 

[Dcf]

I got an owl meter from eddies recently.
my house pulls about 300-400w when there isn't much on.
that will be the fridges and freezer then.
most ive seen it draw was 4.5kw when the oven an induction hob were on
oven rated at 3.5kw and induction hob at 7.5kw.
nowhere near it.
I spoke to a engineer from sse recently who said the amount of commercial places wanting 100kw per phase supplies was unreal.
and when such supply is put in the install runs about 15-20kw a phase.
do sse up rate their substations and network cables to accommodate all these 100kw supplies
do they buggery.
its the same network that's been in for years.
most of the outgoing fuses in your local substation will be 400a.
630a at a push.
this will deal with a whole street.As archy says do the calcs and divide by 10 to get somewhere near real running loads

 

[DPG]

Agree with dcf - my house shows around 300-500W normally. Bit less when kids Playstation and stuff isn't on etc!

 

[7029 dave]

Get some load on,turn everything on then clamp it. (an look at meter) take off. lol

 

[Engineer54]

Maybe looking over the ''Similar Threads'' at the bottom of this page (All marked up with ''Max Demand'' as the title, or part of the title) will at the very least educate you a little, as to how you would go about initially assessing the max demand of an existing installation....

 

[GLENNSPARK]

Maybe looking over the ''Similar Threads'' at the bottom of this page (All marked up with ''Max Demand'' as the title, or part of the title) will at the very least educate you a little, as to how you would go about initially assessing the max demand of an existing installation....

this must have been done ..what....a thousand times eng....you can keep on till your blue in the face about Max. demand & diversity....

common sense has to prevail here.....