What is a cable tray connection plate

A cable tray connecting plate, also known as a joint plate or fish plate, is used to securely join two sections of cable tray, ensuring structural integrity and alignment.

Purpose and Function

Cable tray connecting plates are essential accessories in cable management systems. They are used to splice or join two cable tray sections, maintaining proper alignment and supporting the weight of cables across the joint. These plates help prevent sagging, misalignment, and potential damage to cables, especially in long runs or heavy-duty installations .

Types of Connecting Plates

1. Joint Plate (A2): A wide joint plate suitable for all cable trays, including wide-span trays. It typically comes with the necessary fastening hardware for secure installation .
2. Fish Plate (Medium/Heavy Duty): Designed for medium to heavy-duty cable trays, these plates provide robust support and are often available in corrosion-resistant finishes such as ZM (zinc-magnesium) for enhanced durability .

Material and Finish

Connecting plates are commonly made from steel or aluminum, with finishes that protect against corrosion. Options include galvanized, zinc-coated, or ULTRA GALVA coatings, which offer self-healing protection against rust and are suitable for both indoor and outdoor environments .

Installation

• Align the ends of the two cable tray sections.
• Place the connecting plate across the joint.
• Secure the plate using bolts and nuts provided, ensuring a tight fit.
• Check that the tray sections are level and properly supported to maintain cable integrity .

Compatibility

The choice of connecting plate depends on the type of cable tray:

• Ladder trays: Require plates that can support the rungs and maintain spacing.
• Ventilated trays: Plates must accommodate openings for airflow.
• Solid-bottom trays: Plates should provide full support without obstructing cable entry or exit . Using the correct cable tray connecting plate ensures a safe, durable, and efficient cable management system, reducing the risk of cable damage and maintaining compliance with electrical installation standards.