1.plug points are considered to be ideal, with voltage at them as per specification.
2.if extension boxes are used then, the voltage at ext points will have a drop proportional to
extension wire impedence, hence the appliances connected to it will have a different life span
than specified in its manual over long use.
3.since the points are connected in serial, the point farthest from the extension box will have
more drop compared to near one
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