When sizing a main bonding jumper, which influencing factor is typically considered per the NEC®?

When sizing a main bonding jumper according to the NEC, installation conditions and environment are crucial factors to consider. This involves understanding how the physical surroundings, such as temperature, moisture, and potential for corrosion, might impact the performance of the bonding jumper. The environment can affect conductivity and the jumper's ability to safely conduct fault currents. Ensuring the jumper is appropriately sized for these conditions is essential for maintaining safety and compliance with code requirements.

While other factors like breaker size, connected loads, and the length of the bonding jumper may influence the overall design and effectiveness of the electrical system, the installation conditions and environment specifically address the suitability of the bonding jumper in its intended setting, making it a key consideration in the sizing process.