How to wire 3 phase rotary switch

Thread Starter

vgtmani

Joined Apr 26, 2014
2
Hi,
I have 3 phase connection for my home. I want to instal rotary switch for all the 3 phase. I have 3Nos of L&T 3way rotary with off. so, how to wire it. Please help
 

Georacer

Joined Nov 25, 2009
5,182
What exactly do you want to do with the 3 phase line, what is your end goal?

Upon this will depend whether this thread will be closed or not, for violating the ToS.
 

Thread Starter

vgtmani

Joined Apr 26, 2014
2
What exactly do you want to do with the 3 phase line, what is your end goal?

Upon this will depend whether this thread will be closed or not, for violating the ToS.
My goal is, if one phase line gets failure i should change over to any one of the other two phase line in my home. like that, for all the 3 phase(3 individual phase) i want to install a changeover switch. i need a wiring diagram for it.
 

MaxHeadRoom

Joined Jul 18, 2013
28,576
Do you want to singularly select one phase out of three, IOW, exclude the other two?
Or are will the other phases be in use?
The switching unit will have to carry the maximum current of any given phase.
It would require more info to give a definitive answer.
Max.
 

alfacliff

Joined Dec 13, 2013
2,458
I have never seen 3 phase supply to a house. just because there are three wires coming from the pole, dosnt mean it s three phase. what do you have in your house that requires three phase? if you start switching phases on a three phase system, you will start reversing motors, if you start loosing a phase at a time, you will cause motors to not start, if you start switching dead phases to live ones, you will have more current on the working phase, possibley ore than it can handle.
 

Georacer

Joined Nov 25, 2009
5,182
There are 3-phase household installations in Greece as well.
It's as simple as providing all 3 phases plus neutral to the main panel, and treat them as 3 single-phase systems.

I know it sounds stupid but I've never heard anything contradictory.
 

samuel.whiskers

Joined Mar 17, 2014
95
My house in Australia has a 3 phase supply.... no 3-phase equipment, it is used as 3 separate 240V 100A circuits.... It is fairly common here to have 2 phases at a house, one generally for hot water, one for the power/lighting circuits.
 
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