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An Electrical Junction Box is used for Containing Electrical Wires and are Commonly Hidden behind Finished Walls By Mark J. Donovan Electrical junction boxes are used for containing electrical wire connections. They are typically used to split or join wire runs that feed power to electrical devices. Electrical junction boxes are often positioned behind finished walls in indoor residential applications. In some cases, such as in concrete walls, they are cast into the concrete so that only their access door is exposed. In other cases they are installed as part…