Cables installed inside Huijue cable trays

Cables installed in Huijue cable trays typically include Type TC, Type ITC, and Type MC cables, installed according to spacing, bend radius, and load guidelines to ensure safety and compliance.

Common Cable Types

1. Type TC (Tray Cable) – These are factory-assembled power and control cables with two or more insulated conductors under a non-metallic jacket, rated for 600 volts. They are suitable for industrial power or control circuits, flame-retardant applications, and can be installed in cable trays, raceways, or outdoor locations with support. TC cables must be secured at intervals not exceeding six feet, and Type TC-ER cables can transition between trays and equipment for short distances without continuous support .
2. Type ITC (Instrumentation Tray Cable) – These cables are used for instrumentation and control, available in shielded or unshielded constructions, often with twisted pairs and optional metal armor. They are designed to minimize electromagnetic interference and are suitable for sensitive control applications .
3. Type MC (Metal Clad Cable) – MC cables consist of insulated conductors with or without optical fibers enclosed in metal armor, often with a plastic jacket. They are suitable for indoor and outdoor use, wet or dry locations, hazardous areas, and can be installed in cable trays, raceways, or direct burial where identified. MC cables must also be supported at intervals not exceeding six feet .

Installation Guidelines

• Cable Routing and Support: Cables should be laid in an organized manner, following the tray's structural design. Ladder-type trays are commonly used for heavy cable loads, and proper pre-planning ensures orderly installation .

• Spacing and Fill: Cable fill should not exceed 40% of the tray capacity to prevent overheating and allow for maintenance. Cables must be fixed at regular intervals to maintain spacing and prevent sagging .

• Bend Radius and Handling: Minimum bend radius must be respected to avoid conductor damage. Excessive bending is a common cause of cable failure .

• Segregation and EMC: Power, control, and instrumentation cables should be segregated to reduce electromagnetic interference. All metallic components should be properly bonded to maintain EMC compliance .

• Fire Safety and Labeling: Cables passing through fire-rated walls or floors must maintain fire integrity. Proper labeling and markers improve maintenance efficiency and ensure compliance with technical standards .

• Mechanical Protection: Solid covers or channel trays can be used to protect cables from physical damage, especially for small instrumentation or control cables .

Best Practices

• Verify tray and cable compatibility before installation.
• Follow NEC/IEC standards for voltage ratings, grounding, and ampacity derating.
• Conduct post-installation checks to ensure no damage occurred during pulling or handling.
• Maintain proper documentation and labeling for future maintenance and safety audits . By adhering to these guidelines, Huijue cable trays can safely support a variety of power, control, and instrumentation cables while ensuring long-term reliability and compliance with electrical standards.