David Lock

What benefits does 3-phase give over single phase in a domestic environment please? David

Mark Mac

3-Phase will kill you alot quicker.....

Sosbanite

None - 3 phase does not exist in a domestic environment.
All domestic appliances are low load/low demand items, 3 phase is used in industrial applications where there is a high demand - think of a retail store which needs to power fridges/freezers/lighting/IT infrastructure etc or where there are high load items - think of a manufacturing environment with a number of motors driving heavy physical loads.
Thee is a very valid reason why 3 phase is not installed in domestic situations and that is safety! You could not guarantee the separation of phases in the home which could lead to a person touching two phases and receiving a 415v shock as opposed to 230v - it's not very pretty!

The Zohan

Plans moving ahead for the cannibis factory then david!

alcazar

iTrader: (2)

It does in France

My neighbour has it, and we can if we want.

Our house is in a hamlet, and EDF prefer you to have three phase, since it splits THEIR load too, we are on the end of the supply line

Coupe-Se

3-phase exists in a lot of domestic properties where the anticipated peak load exceeds 100amps.

Larger properties have 3-phase where there are 3 or 4 bathrooms with electric showers. You tend to have several consumer units around the house in different areas connected to different phases.

Properties that have 6 or 7 storage heaters tend to have 3-phase to put the off-peak heating on different phases to the 24 hour circuits. The off peak heating load alone can easily exceed the 100amp capacity of the single phase head and meter.

The basic rule with 3-phase supplies is to NOT have 2 socket circuits in the same room on different phases, other wise it no more dangerous than 230v.

David Lock

Thank you sparkies. Jollly good answers (aside from PH, of course ). David

mikef04

iTrader: (7)

the 3 phase seperation rule exists and states that two lines(phases in old terms) must not be within in 6 feet/2 metres apart unless identified by a "Danger 400V" sticker. Three phase is becoming more and more common in in domestic properites as a single phase supply to large houses would not be sufficent. Especially house running neutron systems for example. For those wondering you will only get 415V across any 2 phases but only one and neutral would nleave only 230V.

David Lock

Sorry - supplementary question/s

If power is supplied through a large gen' set can the same gen' provide both single and three phase? And if it does would you require two separate power supply lines? From an oil consumption point of view would one type be more efficient, i.e. need less oil to produce?

For background this is power supplied to St Helena, an island somewhere on the other side of the world and miles from anywhere!

David

mikef04

iTrader: (7)

you could run three phase to an isolation switch but still only use one phase, iirc you can convert a MEM board to have a three phase inlet but run oly a single phase using all avaiable ways. most genorators do either or, but not sure if you can get nine to do both but in todays world it wouldn't surprise me!

Leslie

Is the cost of getting it installed worth it?

Les

Wurzel

iTrader: (1)

Rubbish! my house is 3 phase as are all house in Germany, admitedly most of the appliances are single phase but I have a 3 phase outlet in my garage and my mate has 3 phase running to his cooker. We managed to blow 2 of the 3 phase in my house last month and 66% of the house went out but. We had to change the Incoming fuses as we blew the mains side of the fuse panel.

The advantage of it I assume is load balancing.

gallois

The other day, 82.58% of my electricity went out.

mart360

Isn't the supply the domestic supply on the external side of most property's 3 phase any way?

From what i understand, its how the electricity company's get the stuff to

you, each phase is split roadside to supply different property's, so property's

1,4,7, have one phase 2,5,8 the other, and 3,6,9 the 3rd phase, and so on..

Mart

BOB.T

What's a neutron system and how do I get one? Sounds amazing!

mikef04

iTrader: (7)

Its a type of lighting, sound, audio visual system, basically all circuits are wired to a controll room, and it turns lights and sound on when you walk through rooms. It can also be wired to close curtains etc etc. Most cost around the £15k+ dependant on the house size of course. bit of a pain to install in a house some one is living in due to the amount of cablesto install but imo they are well worth the install once setup correctly.

RAPID STI

iTrader: (4)

What a load of bullsh it ,

I wish people would give advise on areas they specialise in. This forum is full of this.

BOB.T

Cheers Mike

*starts saving*