Ask a tradesman
We are being asked what kva we require for our new build. it is a 4 bed detached house? any formula's tp work to per sq mtr or similar?
2 Answers from MyBuilder Electricians
You need to know how many electric showers, cookers, etc you have if heating is electric etc? Best way is to declare that all you need it a 100amp supply or work out KVa for a maximum 100amp supply. The cost of a new supply will dramaitaclly increase when you/if execed 100amps anyway. most domestic houses are 60 to 100amp max. As the other poster has said the formula is as follows;
The total power S in kilovolt-amps is equal to current I in amps, times the voltage V in volts, divided by 1000:
For most UK domestic propertives Maximum demand will be 100amps (I) and voltage will be 230 (V)
S(kVA) = I(A) × V(V) / 1000
So kilovolt amps are equal to amps times volts divided by 1000.
kilovolt-amps = amps × volts / 1000
So as a guide 100 x 230 = 23000/1000 = 23Kva
Hope this helps
Answered 3rd Jan 2012
Post your job to find high quality tradesmen and get free quotes
- All Questions
- Architectural Services
- Bathroom Fitting
- Carpentry & Joinery
- Carpet & Lino
- Central Heating
- Chimneys & Fireplaces
- Conversions - General
- Damp Proofing
- Demolition & Waste Clearance
- Fascias, Soffits & Guttering
- Gas Work
- Groundwork & Foundations
- Hard Flooring
- Kitchen Fitting
- Landscape Gardening
- Loft Conversions
- New Builds
- Painting & Decorating
- Restoration & Refurbishment
- Security Systems
- Tree Surgery
- We have viewed a 3 bed house that will need refurbished. Is it reasonable to ask a builder to quote us for the work so we have an idea how much it will in the long term before we make an offer?
- Where do we start with it all... and in what order?
- No quotes for certain areas of work then a large bill once work completed.
- Could our downstairs floor movement be caused by our upstairs shower wall?