Vertical supports for residential cable trays

Vertical cable tray supports are essential for safely routing cables in vertical runs, using brackets, hangers, or clamps spaced according to tray type and load.

Types of Vertical Supports

Threaded Rod Brackets: These supports attach to coupler plates at splice points or along the tray side rails using 3/8" or 1/2" threaded rods. They are suitable for fiberglass or metal trays and provide adjustable height for vertical runs (Atkore).

Wall-

Mounted Brackets: Designed for wire mesh or ladder trays, these brackets secure the tray directly to walls. Some models, like the Kable Kontrol slotted holders, use fold-over tabs for easy installation without additional hardware (Amazon). Beam and Strut Clamps: For attaching trays to structural beams or strut channels, heavy-duty hold-down clamps and C-clamps provide rigid support and can accommodate various tray widths (MP Husky).

Pedestal or Floor Supports: Vertical supports can also elevate trays off the floor to allow airflow and prevent obstruction, often snapping onto pedestal bases (Access Floor Systems).

Installation Guidelines

Support Spacing: Vertical straight lengths should be supported at intervals dictated by the building structure, typically not exceeding 20 feet for standard trays (TechLine Mfg). Fittings and Radii: Fittings with radii less than 12" should be supported within 2 feet of each extremity; larger radii may require additional center supports (TechLine Mfg). Expansion Connections: Place supports 2 feet on each side of expansion joints to accommodate thermal expansion (ExpertCE).

Load Considerations: Ensure the support method matches the anticipated cable weight and complies with NEC Article 392 and NEMA VE-2 standards for residential or commercial installations (ExpertCE).

Material and Finish

Steel Supports: Pre-galvanized or zinc-plated steel is common for durability and corrosion resistance (Legrand, Kable Kontrol).

Fiberglass-

Epoxy Supports: Used for corrosive environments or non-conductive requirements, available in various sizes (Atkore).

Practical Tips

Use two supports for trays 18 inches or wider to maintain stability (Legrand). For wire mesh trays, supports can be spaced every 5 feet for straight sections to prevent sagging (Amazon). Always verify that supports are securely fastened to structural elements and that all trays are properly bonded and grounded according to NEC requirements (ExpertCE).

By selecting the appropriate type of vertical support and following spacing and installation guidelines, residential cable tray systems can be safely and efficiently installed, ensuring long-term reliability and compliance with electrical codes.