Pandora wrote:

I have moved to an old 5 bedroom house that I plan to renovate,
including a complete rewire.

This is also an opportunity to change the domestic supply from 100A
single phase to three phase, if I wish.

I am trying to find a website that has a list of typical currents
drawn by, or VA rating (not Watts - I don't know the appliance power
factors) of, different domestic appliances so that I can calculate if
I would exceed the 100A limit of a single phase supply. Anyone know of
such a website?

Aside from the danger of 415V in the house, would anyone care to
comment on the risk/reward of a domestic three phase supply? (E.g.
higher standing charge?). I do not intend to use any three phase
equipment in the house.

Thanks for your help.

Steve

Would seem like overkill? If not electric heating would not 230
volt 100 amps be OK; unless it's a boarding house with people
living, cooking/eating etc. in individual rooms? Reminds one of
the old 'shilling in the slot meter' old old digs!
Our four bedroom insulated wood frame 1530 sq. ft (main floor)
plus full basement has the here standard 200 amp 115/230 volt
supply. Wired over head from a pole mounted distribution
transformer about 120 metres away.
In this somewhat colder and longer heating season than the UK; we
have electric baseboard heating with individual thermostats for
each room/area. Thirty five gallon hot water heating tank,
clothes dryer, dish washer, radios, TV, computers etc. Several
other (about five IIRC) typical homes are supplied from the same
distribution transformer. No voltage problems.
Lights and wall plugs are 115 volt, 'heavy' items, viz. cooking
stove (oven +4 hobs), water heater, electric heating is 230 volt.
Basement workshop is mixture of 115, and 230 volt for occasional
heater and bench saw.
On a 24 hour average, cos never is everything 'ON' at once, the
consumption is around 4-5 kilowatts per hour, often less. At a
maximum, even if one comes home turns up the heat and put clothes
on to wash, maybe boils the kettle for a few minutes etc. etc. I
doubt if it ever goes up to the 'rated' maximum which in our case
is 200 amps X 230 volts = 46,000 watts or 46 kilowatts!
Suggestion.