- Use residual current device. You will still get a large jolt if you touch the wires, but the RCD will protect your life.
- Usepower tools outside: it did trip several times, and it turned out the extension cords had water inside the sockets, that kind of thing. It’s a nice safety feature.
- Tape some insulating plastic sheet on the back of the PCB over the high voltage bits, if you only want to probe the low voltage side of the PCB.
- Put some heatshrink over wires when they’re soldered to pins and other connectors. Make sure the amount of live exposed metal is kept to a minimum.
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