3 phase boiler install on domestic property

[Edders]

Hi all,

A customer is looking into the option of upgrading to a 3 phase power supply in order to get a new electric boiler system installed. They currently have a single-phase supply. They have an out-building with an electric car charger. Would an option be to have say a 1 way 3 phase board next to the main cut-out fuses and then have one of the phases supplying the out-building, one supplying the main consumer's unit and the 3rd phase supplying the boiler? Or would the main CU need to be split amongst the phases? I think from memory its at least a 10 way board. The main draw in the house is an electric shower. Thanks for taking the time to read.

 

[Marvo]

With domestic 3-phase it's more about distributing the individual loads as evenly as possible across the phases, not actually achieving a constant balanced load.

 

[Edders]

With domestic 3-phase it's more about distributing the individual loads as evenly as possible across the phases, not actually achieving a constant balanced load.

So it wouldn't be an issue having say the main CU on one phase, the car charger on one and the boiler on a 3 phase ?

 

[telectrix]

So it wouldn't be an issue having say the main CU on one phase, the car charger on one and the boiler on a 3 phase ?

you can only go so far with balancing the loads. the 3 phase boiler, a largish load, is balanced anyway. you then juggle the rest to estimate the best way to get close to balance.

 

[Edders]

you can only go so far with balancing the loads. the 3 phase boiler, a largish load, is balanced anyway. you then juggle the rest to estimate the best way to get close to balance.

Thanks telectrix, what im trying to avoid is taking apart the main CU and splitting it up.

 

[telectrix]

so put the main CU on 1 phase, then maybe the outhouse and charger on another. then you have a spare phase to play with if loads are unbalabnced. e.g split the charger from the outhouse.