Contactors

[james king]

Hello.

I was was just thinking about contactors and wondered if it was possible to .....

3x 10a mcb supplying 3 lighting circuits is it possible to switch all 3 circuits on and off via one switch?

 

[Marvo]

It's possible but probably not good practice to have 3 circuits through a contactor when the originate from 3 separate MCB's.

 

[mayfair]

think relays might be better IMHO

 

[Guest77]

Hello.

I was was just thinking about contactors and wondered if it was possible to .....

3x 10a mcb supplying 3 lighting circuits is it possible to switch all 3 circuits on and off via one switch?

yes, but clarification of what your actually switching in regard to types of lights and enviroment would be helpful.

 

[Guest77]

think a relay might be better IMHO

why is that?

 

[Guest77]

It's possible but probably not good practice to have 3 circuits through a contactor when the originate from 3 separate MCB's.

why is that?

 

[infinity]

3 mcb's and a contractor is acceptable!? Or heating circuits for instance, one stat switching on a number of heating circuits is fine

 

[james king]

It's just an example... Just thought if it then. Only used it for switching one circuit in the past. How would this work?

 

[Guest77]

More than acceptable it is common practice throughout factories and business units in the uk. having 3 or 4 lighting circuits feeding lighting and a switch controlling the coil so last one out of the building can shut down the lot with one click is installed in thousands of business properties all over the country.

 

[davesparks]

I see no problem with doing it to be honest, the other option which I have used recently is to use a contactor to switch the feed to a group of MCBs that then feed the lights.