The 881 BRB splitter blocks are designed to mount on all our standard (1100 B / T / 1412 B / T / TSS) and custom boxes.
Insulation is provided by the polymetric insulator. The one piece body includes the main and branch lugs, which can accommodate either copper or aluminum conductors.
The lug allows the electrician to remove the sliding nut for easy access.
The wire is laid in place, the nut is slid back, and then tightened securely.