Electrical wires can be contained in a sheathed coating called cables or it can be concealed in conduit to protect it. Either way is exceptable in many instances, but in areas where the wires could be damaged, conduit is the method of choice. Find out how electrical wires are protected and run in your home. Do you have cables or conduit?
...Source: http://electrical.about.com/b/2014/03/08/electrical-wiring-cables-and-run-in-conduit.htm
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