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In electrical installations, a continuous support, usually overhead, on which electrical cables or conduits are placed. Usually constructed of sheet metal with low sides, resembling a tray.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
cable duct, but consisting of a ladder-like metal framework on the bottom and sides, with the top open.An assembly of metalwork which is used to support insulated electric conductors; similar in function to a metal
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.