thanks for your comment. There are actually a lot of single houses with a doorbell in Bangkok. And the older ones actually work on 220 V (like in my house). The doorbell push closes the circuit and the bell rings – there is no transformer. More modern houses certainly have doorbells working on a save low voltage. But still: Caution should be exercised!

Talking about Zero and Phase, you are right. You will rarely find such dangerous electrical installation today anymore. Thailand’s electricians make a good job nowadays. But for your own safety always use a charge indicator before you touch a wiring.

Best regards,
ALEX

What writer tells about UPS (USV) is right. They are a absolute must in Thailand.

All other things writer tells I have to disagree. I have never seen a doorbell in Thailand. Only big company’s have a bell panel, mostly with camera. Alll operated on a save low voltage, but same as in Europe, just a normal transformer, woking on AC. I think writer means, (same can happen in European country’s) that the working voltage is 4,5-5 Volt, but when you are unlucky the output of the transformer can have a difference with ground from 220-5V is 215V. Enough to get a serious shock. Still the working voltage is a low voltage.

And about zero and Phase pead, they are different in Thailand. Black is phase, zero is grey. And all safety breakers disconnect Zero and Phase, so even if they are changed, the power is complete off.

Maybe writer has a little bit to much imagination?

Further a nice story!

Kind regards, Arjen Schroevers.