Abstract: A system for marking a plurality of separate electrical wires and electrical outlet locations in electrical construction wiring between a circuit breaker panel and a plurality of outlet boxes pursuant to a wiring diagram, including a marker carrier for carrying a plurality of separably adhered markers, a first set of wire markers comprising a first plurality of pairs of separable wire markers distinctively coded in a first manner and divided into a second plurality of subsets with wire markers of each subset further distinctively coded in a second manner, and a second set of outlet box markers comprising a corresponding second plurality of separable box markers distictively coded in the first manner, and further distinctively coded in the second manner. A method for installing electrical wires using the system.