3 phase is much more efficient and less expensive to run.

3 phase is much more efficient and less expensive to run.

Hmmm, can you justify that for a domestic situation (no huge motors etc.)?

Sorry I just added my post as this topic is about 3 phase and single phase and the need for one or the other. Hot water supply and pipes and cost are a whole other topic. We all make our choices with the info we get from whatever sources we choose to use.

Yup, we've whizzed off-topic. That said, I think we've exhausted the "To 3-phase or not to 3-phase that is the question" discussion

Kinda interesting though to consider price of powersupply onephase/3-phase.

In my 7 bed 8 hotwatershower/2 hotwaterkitchen home, I calculated it less expensive to use 200 liter hotwatertank and 30/100 amp onephase, than individual heaters and 15/45 amp 3-phase.

Not to mention the lifetime and lack of repairs on tank-solution.

Sorry, bit off topic, but my input was how to reduce need of 3-phase supply. Hotwaterboilers has high max demand, and lower max demand is available at no or very low cost

Supply Authorities decide if you are to have a single phase or multi phase supply.

This is generally decided on your max demand and /or the loading of the distribution system

in ones area of supply.

There is no need to have any 3 phase electrical equipment in a domestic type environment.

Some electric hotplate and oven units can be connected single phase or 2 phases and neutral. Generally equipment over 20A.