Contactor for lighting and Last Man Out Switch

[edrobbo8]

Hi, looking for some alternative views on this.

Need to fit a contactor and last man out switch for a large house with 2 consumer units, each controlling roughly half of the house. They are fed from 2 separate phases from the 3 phase board.

The last man out switch will be by the front door, and I'm trying to work out how it can switch off around 6 light circuits in each c/u. Would it require 2 separate contactors, with one in each board?

Thanks.

 

[alli]

From board 1 take a live conductor to the switch at the front door, a switch live from the switch to each of the coils of the contactors near/at the seperate c/u (you may need 2 contactors per board if you need 6 dedicated circuits) and a neutral back to board 1. Then cable the Line conductors of the lighting circuits through the contactors. Hopefully job done.

 

[Knobhead]

Just tell them to allow 2 extra minutes to get ready. I’ve never heard such a daft idea in my life, (well not recently).
A DP switch by the door should sort it.

 

[edrobbo8]

Tony you are bang on! Can understand why they want one but will be a pain in the rear if they come in through the back door and have to get to the front door before they can switch on the lights!

 

[mogga]

they will want it 2 wayed with the back door I had similar question asked they wanted to turn ALL the power off at night when they went to bed I reminded them that Fridges dont like losing power neither would the boiler neither would the light the old dear when she needed a pee in the middle of the night they said "haddnt thought of that!"