Yup. It call electricity meters. Install along the db box mcb for each point or any point you want.

http://new.abb.com/low-voltage/products/sy...ctricity-meters

Nope. Stay own house la. No argue aircon usage with my wife.

Everything in the link already. ABB is a damn good brand. Just show this to the electrician. If he don't know, knock his head.

This device is the most simple and easy to install.

+603 5628 4888

Maybe you can look for ABB distributor. Some electrical shop.

Not neccessary to look for abb brand. Maybe got other brand. Just show them this type of device.

http://www.hager.my/building-automation-wi...meters/3022.htm

Actually all those big brand maker have such device. Even cheap china 1 also have. Just search more.

Yes, those common sharing appliance is impossible to measure. The owner have to set the rule, all pay same amount no matter use less or more. Once broken, everyone share to pay. No finger point.

For TS case, he already separate the wiring each for the aircon for every room. That would be easy to instal this measure device. Just put beside the aircon mcb. No need separate db box. So if have 3aircon for each room, require 3 meter for 3 mcb.

If 1 to everything no sharing, than the owner got to renovate to ikea small room style. 2-3mcb separate for each room. And with this measure device each. Everything still can put inside the same db.