Smart Zigbee switch but no ground

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XinfinityoO

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Master Geek
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#296321 8-Jun-2022 07:33

Hi
Currently I have tuya wifi smart switches and they have ground and neutral connection. They are nz/au certified.
I am planning to change these to zigbee (for some requirements and future project). But all switches I come across do not have ground in them. Can they be used, if so what will happen to the ground wire in my switch box.

Or is there a zigbee switch which has ground support.
Thanks

Tinkerisk

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#2923830 8-Jun-2022 09:17

What do you mean with ‚ground‘? Protective earth?

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XinfinityoO

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#2923845 8-Jun-2022 10:00

Yes, currently my smart switch and non-smart ones have ground wire connecting to them. House built 2015

Tinkerisk

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#2923852 8-Jun-2022 10:13

If I understand you the right way you mean zigbee wall light switches. They don‘t need protective earth or N by themself. They only have/need the switched L in and i.e. L1 to the ceiling light. The N and PE is passed through (from the circuit breaker box directly to the ceiling) as well but not connected to the zigbee switch.

richms

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#2923875 8-Jun-2022 11:10

Pictures of what you have would help. Not seen any with an earth terminal on them, but I have only really bought the deta ones locally, so some others may have an earth terminal.

If you don't need it then you just connect all the earths into a joiner in the box.

Richard rich.ms

Tinkerisk

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#2923997 8-Jun-2022 15:50

The reason why zigbee wall switches do not have a neutral conductor and earth connection is simply that in the vast majority of existing lighting installations only one phase is led to the light switch in order to save cables. No one has ever thought that one day computers will replace the light switch. The light switch gains its energy from a small voltage drop across the L conductor - which of course means that it is not potential-free. Be aware that your need a minimum lamp load (approx. 10 Watts) to have that voltage drop for a solid functioning of the switch.

If you use zigbee LED lights in the socket instead, this is of no consequence, since L, N and PE ultimately arrive there and the light switch is bridged so that L is always present at the LED, which is always ready to receive and cannot be switched off by mistake.

XinfinityoO

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Master Geek
+1 received by user: 14

#2924000 8-Jun-2022 15:54

Thanks for the inputs guys.
I guess I will just screw the ground with joiner in the box