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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.