5 ms·Screw in a light bulb and you work with 230V and we still allow people to screw in their own light bulbsby bpfrh 1y agoScrew in a light bulb and you work with 230V and we still allow people to screw in their own light bulbstom89999 1y agoWhat are the 5 safety guidelines?bpfrh 1y agoDon't know, I just make sure there is no power.