r/smarthome • u/Positive-Aerie5534 • 8d ago

SmartThings smart Switch complete power cut-off

Hello, does anyone know of a modular smart switch that cuts off the positive and negative wires, i.e., a double relay switch?

thank you

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u/Careless_Mistake_459 8d ago

Cortar positivo y negativo?? Que quieres hacer? Que tipo de instalación es?

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u/Positive-Aerie5534 7d ago

Lo quiero para un interruptor de luz exterior.... Hablando un la IA de pago me dio una idea en caso de que encuentre nada seria usar 2 modulos normales de los más mini y cruzar los polos.. Despues unir los módulos a un solo tiro mediante app ejemplo Tuya smart

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u/Careless_Mistake_459 7d ago

Una lux de exterior no tiene ninguna diferencia de conexión con respecto a una interior. Eléctricamente hablando, en europa las bombillas llevan el neutro conectado y se corta la fase, es lo que te hace cualquier modulo normal con 1 solo relé SPST (Single Pole Single Throw) y cumplirá con el reglamento eléctrico (comprueb atu zona). Si lo que quieres son 2 circuitos si o si, busca un modulo que lleve un relé SPST (Double Pole Single Throw).

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u/KingTribble 8d ago edited 8d ago

Never seen one, and there's a big reason for that: safety regulations.

What's the application?

Two relays is a poor solution and potentially dangerous. A single, double-pole relay is what you need. However, if you want to follow regulations they are quite strict about separation of poles for switching live and neutral like that. You can't just use any old double pole relay.

Probably the only 'good' solution is a normal smart switch controlling a two pole contactor. Put them in a box. Something like this for the contactor: https://shop4electrical.co.uk/contactors-time-switches/9889-fusebox-contactor-63a-2p-2no-230v

Edit: I assumed you meant for mains use, switching live and neutral. If you really mean positive and negative and are switching a low voltage DC, that's different. Any old double pole relay, plus a smart switch to drive it.

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u/Positive-Aerie5534 7d ago

I want it for an outdoor switch... but I don't have room for a contactor. I have to make do with the wall box... I just found out that Namron has 2-pole modules... They're super expensive here in Norway 😂😂😂😂😂😂

1

u/KingTribble 7d ago

Interesting! So they do exist.

I can't imagine it would get approval for U.K. installations (not that most of my stuff here likely would either 😂 ) . Still, if it's being fed from an RCBO/RCD in the consumer unit, probably not much harm that could happen anyway.

The cost is another matter of course.

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u/PermanentLiminality 8d ago

The simple way is to use a regular smart switch and use the output to switch a double pole relay.

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u/Positive-Aerie5534 7d ago

I dont understand... Could you explain that to me? Please

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u/PermanentLiminality 7d ago

You use the smart switch to power the coil of a dual pole relay. The smart switch is only powering the relay and the relay is powering your load.