The live wire of domestic circuits is usually red and is at high voltage. The neutral wire is black and has voltage close to that of the ... ... <看更多>

Live, neutral,and earth, are labels that are used to convey some information on the use of each wire. You are correct in thinking that in a ... ... <看更多>

both blue and green (black and white, black and red) are live in many ... Typically the resistance to earth from ground and neutral wire is ... ... <看更多>