The size of bonding jumpers on the line or supply side of service equipment is based on the size of the ___.

The size of bonding jumpers on the line or supply side of service equipment is determined based on the size of the supply conductor. This means that bonding jumpers must be appropriately sized to ensure they can safely conduct any potential fault currents that may occur in the system.

When specifying the bonding jumper size, it is important to take into account the ampacity of the supply conductors, as these conductors are responsible for carrying the maximum current during normal operation. The bonding jumpers provide a low-resistance path to ground, which is essential for ensuring that the overcurrent protection devices operate correctly in the event of a fault. If the bonding jumper is too small, it may not effectively handle the fault current, creating a safety hazard.

Other options, such as the rating of the overcurrent device, service equipment, and grounding electrode, relate to grounding and bonding but do not directly dictate the size of the bonding jumpers. The bonding jumper must be sized to correspond directly with the capacity of the conductors that could supply current under fault conditions, ensuring system safety and compliance with electrical codes.