Typical cost range per square foot for commercial electrical wiring spans from roughly 6. 50 dollars per ft2, depending on specification level and regional market conditions. DWC is a specialty wire and cable. The Suggested Retail price column, also referred to in the industry as the third column, end column or best column are the manufactures' most current published prices. The Average Cost column represents the national average purchase prices and is to be used as a guide to competitive pricing. Single or multi-conductor cables provide connectivity for power, control, signal, data, communications, or process/instrumentation applications. Order cables cut to length, or in bulk lengths.