The patented, built-in clamps rigidly hold AC, MC, MCI-A and even NM cable, from 14/2 to 10/3 (plus ground)—all on one side of box, for easy wire dressing. Clamps and grounds are attached with forward-facing threaded studs—nothing protrudes out the back. “Superneutral” multi-circuit feeds can now be used to cut home runs and panel entries by two-thirds.