Photovoltaic cable tray fixing

PV cable trays are fixed using specialized mounting systems, clips, and covers to ensure safe, durable, and organized cable routing.

Types of Cable Trays for PV Systems

Photovoltaic installations commonly use mesh trays, wide-span trays, and closed cable trays. Mesh trays are lightweight and allow airflow, while closed trays provide additional protection against environmental factors. Materials include galvanized steel, aluminum, or stainless steel, chosen for corrosion resistance and durability in harsh outdoor conditions .

Fixing Methods

1. Mounting Adapters and Clips: Mesh trays can be attached to roof anchors or mounting stones using adapters like the OBO FangFix system, allowing single-action installation . Cable clips and tie mounts secure cables to rails or trays, preventing movement and strain .
2. Integrated Cable Channels: Some PV mounting systems, such as novotegra, integrate cable channels into the substructure. Cables can be laid along rails or module supports, and covers can be clipped in to protect against UV, water, and animal damage .
3. Straps and Covers: On flat roofs, trays or channels are often secured with straps, and covers provide passive shielding to reduce electromagnetic interference and protect against mechanical damage .
4. Vertical and Free-Standing Mounting: For vertical cable runs, ladder-type trays can be mounted directly to walls or steel structures, with strain relief to prevent cable stress .

Accessories and Protection

• Cable Ties and Clips: Available in multiple sizes for securing module and string cables.
• Covers: Protect cables from UV radiation, water, and mechanical damage.
• Base Troughs: Can serve as cable channels with integrated water drainage for flat roof systems .
• Strain Relief: Essential for vertical runs to prevent mechanical stress on cables .

Best Practices

• Ensure mechanical protection for all cables to prevent failure of the PV system.
• Use corrosion-resistant materials suitable for the installation environment.
• Maintain organized routing to facilitate maintenance and reduce electromagnetic interference.
• Follow manufacturer instructions for clip spacing, tray support intervals, and cover installation to ensure long-term reliability . By combining proper tray selection, secure fixing methods, and protective accessories, PV cable installations can achieve durability, safety, and compliance with electrical standards.