Polarized plugs are safer than non-polarized kinds due to achievable reversed polarity and an open up circuit. If the recent and neutral tines over the plug don’t match the hot and neutral slots around the outlet, electrical power could arc out. Electric power offer in Vietnam is 220 Volts at https://types-of-plug-tops33333.blogs-service.com/60443726/the-fact-about-all-types-of-electrical-plugs-that-no-one-is-suggesting