Where must the electrician provide a bonding jumper on the horizontal cable tray at the BCES project?

In a horizontal cable tray system, bonding jumpers are required for several reasons, primarily to ensure safety and continuity of the electrical grounding system. When using a cable tray, it is crucial to maintain an effective grounding path throughout the electrical installation.

The bonding jumper should be placed between each section of the horizontal cable tray to ensure that there is no potential difference that could pose a risk of electric shock or equipment damage. This is particularly important in environments where different sections of the tray may be at different potentials due to factors such as thermal expansion or installation differences.

Moreover, installing bonding jumpers at each section helps to protect the entire system against electromagnetic interference and ensures that all parts of the cable tray are properly grounded, facilitating the safe operation of electrical equipment housed within the tray.

While it may be considered to bond where accessible or between vertical and horizontal runs, these options do not provide the comprehensive grounding needed throughout the entire system that bonding between each section does. Therefore, placing bonding jumpers between each section is essential for meeting safety standards and maintaining system integrity.