Heavy Duty T-Grid Box Hanger | Twist Clip With Wing Nut | Acoustical, Ceiling and Partitioning, Electrical | Optional Solid-State Smartspot Indicator Time-Delay for Motor Start-Ups and Transformer Inrush Currents Without Nuisance Opening Current-Limiting for Low Peak Let-Thru Current Rejection-Style Design Prevents Replacement Errors (When Used With RecommeFurbay Electric Supp