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The 3M™ cable stacker SI-1 and 3M™ furring strip cable stacker SIFS-1 are intended for use with NM and UF cables on framing members. SI-1 allows the installation of multiple NM or UF cables on one side of a 2 x 4 in vertical or horizontal raceways. SIFS-1 allows multiple cable installations on one side of a furring strip. The cable stackers address Article 300-4(d) of the National Electrical Code (NEC) and the Canadian Electrical Code, Part 1, Section 12-516.