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And for those who dont think a cord unplugging is dangerous growing up my mom had lots of pictures hung up one had its wire break and when it fell the wire shorted against a plug whose contacts were exposed in that case we think the falling picture hit the plug to expose the contacts. My house was completely rewired by the previous owner they tore out all the old knob and tube and replaced it with modern wiring i definitely appreciate this but unfortunately they left absolutely no extra space on the new breaker box. Why does the usa use 110v and uk use 230 240v what are the advantages explain me with calculation why do they use different frequencies like 50hz 60hz what is the reason. Ive been trying to get my long suffering toyota rav4 first generation 1998 to start after numerous different problems the latest of which ive narrowed to the spark plugs not firing seemingly due to no power reaching the spark plug wires