trench duct

trench duct

[′trench ‚dəkt] (civil engineering) A metal-lined trough set into a concrete floor with removable cover plates that are level with the top of the floor; used to house electrical connections.

trench duct

trench duct A metal trough buried in a concrete floor and having removable cover plates that are level with the top of the floor; used to carry electric conductors.