How to edge cable trays

Installing cable trays on edge is generally not recommended due to safety, structural, and heat dissipation concerns, but if necessary, careful planning, secure fastening, and proper cable management are essential.

Understanding Edge Installation

Running cable trays on their edge means positioning them vertically rather than horizontally. This configuration is non-standard and can introduce several challenges:

• Cable support issues: Cables rely on the tray rungs for support. On edge, every cable must be individually secured to prevent sliding or sagging .
• Heat accumulation: Vertical stacking increases cable density, which can reduce airflow and lead to higher operating temperatures .
• Structural integrity: Most cable trays are designed for horizontal loads. Edge installation may exceed manufacturer specifications, potentially compromising safety .

Safety Precautions

• Personal protective equipment (PPE): Always wear Kevlar gloves, eye protection, and appropriate footwear when handling and cutting trays .
• Secure fastening: Use cable ties or clamps carefully to avoid over-tightening, which can damage cable insulation .
• Avoid mixing metals: When cutting or installing, do not use the same blade for stainless steel and carbon steel to prevent galvanic corrosion .

Cutting and Preparing Trays

• Use appropriate tools: Band saws are preferred for precise cuts with minimal burrs. Angle grinders can be used if necessary but increase risk of sparks and material damage .
• Deburr edges: After cutting, remove sharp edges to prevent cable damage during installation .
• Avoid torches: Cutting with torches can weaken the tray and damage protective coatings .

Cable Management Tips

• Secure each cable: On edge trays, every cable should be tied to a rung or support to prevent movement .
• Plan cable layout: Avoid tight bends and respect cable bend radius to prevent strain .
• Consider de-rating: Edge installation may require larger cables or additional de-rating due to reduced heat dissipation .

Alternatives

If possible, consider vertical cable racks or conduit systems designed for vertical runs. These provide proper support and airflow without compromising cable integrity .

Summary

While edge installation of cable trays is feasible, it introduces significant risks including cable damage, overheating, and structural concerns. Proper planning, secure fastening, careful cutting, and adherence to safety standards are critical. Whenever possible, use systems specifically designed for vertical cable support to maintain safety and performance .