What alternative name is sometimes used for ducts in transmission lines?

Trunk ducts or trunks are an alternative name used for ducts in transmission lines. This terminology specifically refers to the larger channels or pathways that carry multiple cables or wires, allowing for organized and efficient transmission of electrical signals or power over long distances. The use of 'trunk' suggests a main channel that serves as the primary route for these transmission lines, highlighting its significance in the overall system of cable management.

Other options such as conduits, subway systems, and cable trays serve different purposes or contexts within electrical installations. Conduits generally refer to protective tubes that contain electrical wires, while subway systems are associated with transportation infrastructure, not electrical transmission. Cable trays, though relevant for supporting and managing cables, do not specifically denote ducts and are typically used for horizontal runs rather than vertical ducts, distinguishing them from the concept of trunk ducts.