The use of trays and troughs for supporting control and power cables in electric installations [includes discussion]

The use of the tray and trough system in large modern stations is a design which promises to reduce the initial installation cost of a large electric installation. The tray or trough system does not give as complete over-all safety and security from sabotage as does the conduit and duct system, unless an especial effort is made to isolate them completely by height or by installing a totally enclosed type; however, it has such advantages that the station layout designer can justify the design.