Diversity question

[BoocockP]

Hi all,

I am currently calculating the load requirements of a new build and I'm a little confused on what I have to apply for socket outlets. Appendix 1 of the On-site guide Table 1B options 9 or 10? Option 10 seems to give me a lower loading factor than option 9 but I don't know if there is a hard and faast rule to which has to be used.

Any advise would be much appreciated.

Paul.

 

[Robojin]

The likely largest point of utilisation would be the kitchen/utility ring if that helps on 9

10 = circuits you've not accounted for in 1-9

 

[SPECIAL LOCATION]

Hi all,I am currently calculating the load requirements of a new build and I'm a little confused on what I have to apply for socket outlets. Appendix 1 of the On-site guide Table 1B options 9 or 10? Option 10 seems to give me a lower loading factor than option 9 but I don't know if there is a hard and faast rule to which has to be used.

Any advise would be much appreciated.

Paul.

There is NO hard and fast rule....

Flick back over to page 95...

read the second paragraph!

It will be your specialist knowledge of the installtion...

e.g. what type of use is the property going to be put to?

Such as .. How many people are likely to be simultaneously using loads of electrical appliances while the kitchen is running full whack and someone is in the shower and DIY Joe is doing his wedding in the garage!?

Just cuz a house has 1x32A ring and 3x20A radials doesn't mean they are ALL running MAX load simultaneously.

Use your discretion and wisdom based on the guidance and your specialist knowledge of the installation.

and I bet it don't exceed 80A.. (approx 18.500KW)

cuz thats what most supply companies stipulate now anyway!

 

[BoocockP]

Thanks for the advise guys. The problem I have is that the new build is a house plus annex and potentially contains two kitchens. Mr Part P has suggested I need two supplies to the property unless I can get my calculations under 80A.

 

[msb2003]

and DIY Joe is doing his wedding in the garage!?

May I be the first to congratulate the bride and groom!!

 

[Andy™]

Thanks for the advise guys. The problem I have is that the new build is a house plus annex and potentially contains two kitchens. Mr Part P has suggested I need two supplies to the property unless I can get my calculations under 80A.

hows big is the house? are both kitchens really going to be used at the same time?

 

[vandalay]

Thanks for the advise guys. The problem I have is that the new build is a house plus annex and potentially contains two kitchens. Mr Part P has suggested I need two supplies to the property unless I can get my calculations under 80A.

Would the annexe be fed from its own CU ?

 

[m4tty]

May I be the first to congratulate the bride and groom!!

Is a diy Joe wedding legal?

 

[BoocockP]

House will be used by a family of four (two adults and two children) and the annex is for grandma and grandad. All hobs are gas, as is the heating and showers but Mr Part P has sugested I have to treat it as two dwellings and use option 9 which is 100% of largest circuits 32A + 32A = 64A, thats before I start added all the other circuits etc. I can keep my figures under 80A if I use option 10 for ring mains (i.e. 100% of largest appliance + 40% of all other appliances). I just don't know if he'll allow it this way? Oh well, only one way to find out - I'll be sending them to him tomorrow....

 

[BoocockP]

Yes