Will Accommodate Commercially Available 15A or 20A Duplex Receptacles. Base Has 1/2" and 3/4" Concentric Trade Size Kos. Nonmetallic Cover Has 1500 and 2600 Series Raceway Twistouts On All Four Sides. Two 1500WC Wire Clips Included. Side Wiring Recommended. Gray Finish. Note: Certified to Canadian Safety Standards. For Sale In Canada. When Ordering These Products, Add “C” Prefix to Part Number to Denote The Canadian Version, I.E “C1546B”.