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Sanity Check On Electrical Relay Wiring

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I bought a Sonoff smart relay and before I actually cut any wires or make a mess, I just wanted to check that I understand the wiring diagram.

My understanding is that A and B are the neutral wires and it doesn't matter which one is plugged into which terminal. The part that I'm unsure of is the L-Out and L-In wires.

From my switch (that is in the on position) I'm assuming that the top wire C1 is going to the light, so C2 should go into the L-Out terminal. Is that right?!

Edit - /u/PushThroughThePain pointed out, these are not UL or ETL certified and would likely void my home insurance. Unfortunately, I will have to find another brand that is certified or replace the switch with a UL/ETL certified smart switch instead. If any Europeans are interested in 4 Sonof relays and want to pay for shipping, just DM me and I'll send them you're way.

https://preview.redd.it/yfcwpty3b28h1.png?width=2041&format=png&auto=webp&s=f47f006aba02d395ff16c99194950d0f13901a85

submitted by /u/Hefty-Possibility625
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