# Circuit breaker to control water boiler

**URL:** <https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319>\
**Category:** Questions & Help\
**Created:** [November 13, 2020, 11:29am UTC](https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319 "2020-11-13T11:29:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Baldhor](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/baldhor/32/27028_2.png) [@Baldhor](https://community.homey.app/u/Baldhor)\
**Post date:** [November 13, 2020, 11:29am UTC](https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319/1 "2020-11-13T11:29:35Z")

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Hi,

I have 2 water boilers at home. they are very stupid models.  
And I’d like to control them from homey.

I’m looking for a circuit breaker :

- High power (220v / 30A)
- Connected through Wifi
- Can measure power usage
- Directly connected to Homey, no IFTTT, no brand specific server

Any idea ?

I tried looking through the forum, but could not find a post about this subject.  
Thank you.

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**Author:** ![Mickel\_Luiten](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mickel_luiten/32/12404_2.png) [@Mickel\_Luiten](https://community.homey.app/u/Mickel_Luiten)\
**Post date:** [November 13, 2020, 1:25pm UTC](https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319/2 "2020-11-13T13:25:13Z")

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Are you sure its 220v /30A.  
Then you talking about a boiler of 6600w

This cant be connected on a normal 16A circuit breaker?

Please explain?

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**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [November 13, 2020, 1:35pm UTC](https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319/3 "2020-11-13T13:35:53Z")

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> [@Mickel\_Luiten](#):
>
> This cant be connected on a normal 16A circuit breaker?

30A (or 32A) breakers are pretty normal for water heaters. Not everywhere in the world is gas used to heat up water 😜

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**Author:** ![Slof](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/slof/32/1318_2.png) [@Slof](https://community.homey.app/u/Slof)\
**Post date:** [November 13, 2020, 3:18pm UTC](https://community.homey.app/t/circuit-breaker-to-control-water-boiler/37319/4 "2020-11-13T15:18:48Z")

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Just use a Sonoff to control a big relay. Normaly they will have a 230VAC coil.