Discuss 4.5kw on 30a cooker in the UK Electrical Forum area at ElectriciansForums.net
What is your specific question? If it's 'How is diversity applied to a domestic cooker rating?" then no, it's not right.
4500/ 230v is less than 20A so a 30A supply is fine.
however you still need to check cable size? rcd protection?
however you still need to check cable size? rcd protection?
OP - for next time when the appliance is bigger I've set out the diversity calculation for a 4.5 Kw cooker below. It's certainly the most confusing one.
Full load current: (4500/230)= 19.57amps
Set aside the first 10 amps, and work out 30% of remainder
9.57 amps x 0.3 = 2.81 amps
Add the first 10A back = 12.81 amps if no socket on switch
If there's a socket on the plate add 5 amps. 17.81 amps if it has socket
So when adding up maximum demand of the house you'd use the appropriate value.
Full load current: (4500/230)= 19.57amps
Set aside the first 10 amps, and work out 30% of remainder
9.57 amps x 0.3 = 2.81 amps
Add the first 10A back = 12.81 amps if no socket on switch
If there's a socket on the plate add 5 amps. 17.81 amps if it has socket
So when adding up maximum demand of the house you'd use the appropriate value.
For a long time I didn't have the on site guide. I finally relented a year or two ago and I'm still not sure it's worth the money. I favour the ProCerts apps for most things, and the OSG omits some useful tables for current carrying capacity of some cable types.
That page @i=p/u posted, and the couple before it are probably the only pages I use in it most of the time.
That page @i=p/u posted, and the couple before it are probably the only pages I use in it most of the time.
Feeling it as well!
14th is 224 pages of A5 paper, cost £1.25, and best of all, it can be read like a normal book. Sections A to K, with each reg. numbered sequentially, starting from 1, with 8 short appendices at the back.
14th is 224 pages of A5 paper, cost £1.25, and best of all, it can be read like a normal book. Sections A to K, with each reg. numbered sequentially, starting from 1, with 8 short appendices at the back.
Last edited:
Reply to 4.5kw on 30a cooker in the UK Electrical Forum area at ElectriciansForums.net
Similar threads
- Question
even allowing for diversity this sounds a bit tight for a 100 amp supply, can you tell us what the existing circuits actually have connected to...
- Simon23
- UK Electrical Forum
- 2
- 664
OFFICIAL SPONSORS
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
YOUR Unread Posts
-
Consumer unitHi, I have been living in my new house for about a year. I checked inside my consumer unit...
- Latest: suhel_a
-
Providing Lighting from Motor SupplyApologies for the vagueness in the title. You'll have to forgive my ignorance on the below too -...- Latest: lozarus
-
What do I do with this? (192? home)We call that a "lath and plaster" ceiling here in the UK, and pretty well all the houses I have...- Latest: Avo Mk8
This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.