What is required for cable trays to accommodate changes in direction?

Cable trays are designed to support electrical wiring and facilitate the organization and routing of cables. When it comes to accommodating changes in direction, the use of fittings or other suitable means is necessary to ensure proper support and alignment of the cable trays.

Fittings, such as elbows or tees, provide the necessary structure to smoothly transition the cables around corners or bends, thereby reducing stress on the cables and preventing potential damage. This is critical for maintaining the integrity of the electrical system and ensuring ease of installation and maintenance.

While securing with screws can be important for stability and attachment, and flexible connectors may help in certain applications, they do not specifically address the need for structural changes in direction within cable trays. Similarly, wire ties serve a different purpose, primarily for bundling cables together, and do not provide the necessary support for directional changes in the trays themselves. Thus, the use of fittings or other suitable means is the correct and most relevant requirement for ensuring proper changes in direction within cable trays.