National Standard for Cable Trays 2006
The NEMA VE 2-2006 standard provides comprehensive guidelines for the proper installation, handling, storage, and maintenance of cable tray systems, ensuring compliance with NEC Article 392 and safe work practices.
Overview
The NEMA VE 2-2006 publication, developed by the National Electrical Manufacturers Association (NEMA) and approved by the Cable Tray Institute, serves as a practical guide for installing cable tray systems . It is intended for engineers, contractors, and maintenance personnel and emphasizes safe work practices in accordance with NFPA 70E. The standard does not replace local electrical codes but complements them by providing detailed installation and maintenance guidance .
Scope and Purpose
The standard addresses:
- Shipping and handling of cable trays to prevent damage during transport .
- Storage requirements to maintain tray integrity before installation .
- Installation procedures, including proper support, alignment, and securing of trays .
- Maintenance and system modifications, ensuring long-term reliability and safety .
- Safety warnings, such as prohibiting the use of cable trays as walkways or ladders, and highlighting the risk of hazardous voltages . The guidelines are designed to accommodate both metallic and nonmetallic cable tray systems and are periodically reviewed to reflect advances in technology and construction techniques .
Compliance and References
- NEC Article 392: Ensures electrical code compliance for cable tray installations .
- NEMA VE 1 and NEMA FG 1: Provide additional design and fabrication standards for cable trays .
- NFPA 70E: Specifies safe electrical work practices to protect personnel during installation and maintenance .
Key Recommendations
- Only qualified personnel should perform installation and maintenance .
- Follow proper support spacing, load ratings, and alignment to maintain system performance .
- Regularly inspect and maintain cable trays to prevent damage or hazards .
- Use the standard as a guideline, recognizing that it does not cover every possible installation scenario or guarantee product performance .
Conclusion
The NEMA VE 2-2006 standard is a critical reference for ensuring safe, compliant, and effective cable tray installations. It provides detailed guidance on handling, storage, installation, and maintenance while emphasizing safety and adherence to electrical codes .
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