<P>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''.</P>