Swap 3 gang switch to smart switch

[SoNyz85]

Hi guys, I am new one on here and I was wondering if someone can help me with my doubts.

Basically I have a switch 3 gang 3 way.
I have 8 wires, no neutral.
Every single gang has live in and live out.
I want to replace it with a smart switch where it suppose to have 1 live in and live out, then 3 lives in and 3 out, 2 wires for each gang.
Now, my question is: can I merge all lives in 1 live in and use 1 live out for each lamp?

Thank you in advance for all answers.

 

[Ind spark]

You need to make sure all 3 feeds are on the same circuit, if so you could use 1 and park 2.

Put some pictures up it may or may not help

 

[SoNyz85]

You need to make sure all 3 feeds are on the same circuit, if so you could use 1 and park 2.

Put some pictures up it may or may not help

Hi Ind and thanks for your answer.

 

[SoNyz85]

You need to make sure all 3 feeds are on the same circuit, if so you could use 1 and park 2.

Put some pictures up it may or may not help

I didn’t know I could park lives wire
That’s a good news.

Can I test to swap a “main live in” to each switch? If on different circuit it shouldn’t work or could I damage the light?
If that live in works with all 3 gangs I resolved my issue.

 

[adgjl]

It will work, but you would have created a “borrowed neutral” which could kill or injure you or someone else working on the lighting in the future. If all switches are fed off the same led you can do it, otherwise no.

 

[Bazza]

If on different circuit it shouldn’t work or could I damage the light?

If they are different circuits then you'll have problems. an RCD may trip, for instance. Looks like one of the circuits is a two-way (ie there's another switch, maybe upstairs?)
If so, thats going to be a whole bag of pain to resolve and - maybe - that means two diferent lighting circuits (upstairs and downstairs...)

 

[SoNyz85]

If they are different circuits then you'll have problems. an RCD may trip, for instance. Looks like one of the circuits is a two-way (ie there's another switch, maybe upstairs?)
If so, thats going to be a whole bag of pain to resolve and - maybe - that means two diferent lighting circuits (upstairs and downstairs...)

Hi Bazza and thanks for your answer.

There is not upstairs, there is another switch 2 gangs at the end of the room, that switch has just the last gang of the 3 gangs switch and a light in the balcony.
The 2 way switch gives live to the other switch and at the same time is 2 way, is that right?

 

[SoNyz85]

If they are different circuits then you'll have problems. an RCD may trip, for instance. Looks like one of the circuits is a two-way (ie there's another switch, maybe upstairs?)
If so, thats going to be a whole bag of pain to resolve and - maybe - that means two diferent lighting circuits (upstairs and downstairs...)

This is the second switch.
Left last light
Right balcony light

 

[SoNyz85]

It will work, but you would have created a “borrowed neutral” which could kill or injure you or someone else working on the lighting in the future. If all switches are fed off the same led you can do it, otherwise no.

There is no neutral, the smart switch that I want to get has a capacitor that goes ti light to avoid the neutral

 

[Ind spark]

First thing is check all the switch goes dead when 1 x mcb is switched off

 

[MGW]

For two way switching when adding Smart function I used a smart relay at the light. I know only one switch is two way. But may be easier adding at light as I know of no 3 gang smart switches not needing a neutral.

Loads of 2 gang, I like the TP-Link range as having a battery in the switch means no staying on dim, or flicker problems.

My 4 gang switch bottom of stairs uses three independent supplies.

 

[SoNyz85]

I would try to use the main live with all gang and see if the lights come on.
If it works, I stop the 3 lives of 3 gangs and use the only one live for 3 of them, is that fine?
About the last switch (2way) i plug 2 lives together as the live comes in and gives the live to the second switch, I think it should work perfectly, can anybody confirm?

 

[SoNyz85]

Just to let you know that all works fine, thank you.