Relay switch - Live or Neutral to connect?

[aadesh103]

I'm trying to control a small table lamp with AC power, using a relay switch board with a Songle srd-05vdc-sl-c. There are 3 screw ports for each of these relays (the board came with two). After a few experiements with an LP (the 3.3V works! i can hear the click sound from the relay) I figured how to control the on/off of the relay box.

If i understand the relay circuit correctly, either neutral or live from the AC part is to be cut and connect to the screw ports, so that the relay switch can complete the circuit and control it.

Now my question is, on the AC part, there are 3 wires - ground, neutral, and live. Should I cut neutral or live for connecting to the relay?



Thanks in advance

 

[bertus]

Hello,

It is a usual practice to switch the live side.
When switching the neutral side, the switched device is still connected to live.

Bertus

 

[aadesh103]

Thank you for your response and help.

 

[davenn]

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