Do I need a 415v coil contactor?

[Mog_98]

Hi guys, first post on here so hope it doesn’t sound too dull. I’ve recently qualified but my background is domestic...recently started with a company working in commercial so haven’t had much experience in working with contactors. But basically I’ve got 3 rows of lights that need to be separated with individual switches as they are all on together at the moment..what I can’t get my head Around is if I use a 3phase contactor with my switch wires coming in to energise the coil won’t that effectively turn the contactor on so all 3 of my loads become live? Do I need to have separate coils like 3phase coil or separate contactors?

 

[ElectroChem]

A contactor is an electrically controlled switch, you will need one for each load you want to control.
Power >> switch >> contactor coil
Power >> contactor line terminal || contactor load terminal >> lights

 

[Spoon]

If you currently have 3 phase going to the 3 lines of lights and you want to turn on each line individually then you will end up using 1 phase per line of lights. Single phase. As above, each switch will switch on its own contactor, so the contactor will be single phase.

 

[Dabbers]

Most Manufacturers do a single module contactor rated at 20A however they are only 230V coils so you will need a Neutral across A2 and a feed from each switch to A1 let me know if want a drawing..