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

Edited April 13, 201016 yr by katabeachbum

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.