Tabs that can be removed to make openings in a box. The openings accommodate cable and conduit connectors. Home Improvement Encyclopedia

Circular perforations in the top and bottom panels of an enclosure that can be removed to provide entrances and exits for feeder wires enclosed in conduit.

Tabs that can be removed from electrical box or fixture to make wiring connections

Prescored holes often provided by I-Joist manufacturers for the contractors convenience to install electrical or small plumbing lines. They are typically 35 - 45 mm in diameter and spaced 300 to 600 mm on centre along the length of the I-Joist.

In the base of a systems furniture panel, refers to the hole provided for an electrical or tele/data outlet.