Horizontal splicing of straight cable trays

Horizontal splicing of straight cable trays is achieved using straight or adjustable splice plates, which connect tray sections securely while maintaining alignment and structural integrity.

Types of Horizontal Splice Plates

1. Standard Straight Splice Plates These are used to join two straight sections of cable tray in a horizontal line. They are typically furnished in pairs and include all necessary hardware for installation. Standard plates are suitable when no adjustment is needed between tray sections ( ).
2. Horizontal Adjustable Splice Plates These allow for minor horizontal adjustments or offsets when standard straight fittings do not align perfectly. They are ideal for field modifications or when precise alignment is difficult. Adjustable splice plates are also supplied in pairs and include hardware, but bonding jumpers may be required for electrical continuity depending on the system ( ).

Installation Guidelines

• Preparation: Determine the desired alignment and angle between tray sections. Mark the cutting line on the tray if field adjustments are needed ( ).
• Cutting: Use a metal cutting tool to trim the tray to fit the installation. Remove any rungs that interfere with the splice ( ).
• Attachment: Position the splice plates over the ends of the tray sections. Insert bolts through the pre-drilled holes and tighten securely. Ensure the splice is flush and aligned ( ).
• Support: Splice plates require support within 24 inches (600 mm) on both sides to comply with NEMA VE2 standards ( ).
• Bonding: For systems requiring electrical continuity, install bonding jumpers as specified by the manufacturer ( ).

Practical Considerations

• Hardware: Most splice plates come with standard bolts (e.g., 3/8") and are supplied in pairs. Special hardware may be required for non-standard applications ( ).
• Material Compatibility: Ensure the splice plate material matches the tray system (metallic or fiberglass) to maintain structural integrity and corrosion resistance ( ).
• Thermal Expansion: Some splices can also accommodate thermal expansion, reducing stress on the tray system ( ). Using the correct type of splice plate and following proper installation procedures ensures a secure, aligned, and code-compliant horizontal connection between straight cable tray sections.