Final answer:
Bonding jumpers for paralleled ungrounded supply conductors should be based on the size of the conductors in each raceway or cable.
Step-by-step explanation:
In electrical systems, when ungrounded supply conductors are paralleled in two or more raceways or cables, bonding jumpers are required for each raceway or cable. The size of the bonding jumper should be based on the ampacity (or current-carrying capacity) of each raceway or cable.
For example, if you have two raceways or cables with 6 AWG ungrounded supply conductors in each, the bonding jumper for each raceway or cable should also be 6 AWG.
This ensures proper grounding and helps maintain safety by minimizing the potential for electrical shock or damage caused by electrical faults.
The question addresses the sizing of bonding jumpers in paralleled electrical conductors within raceways or cables, which is crucial for grounding and overcurrent protection in electrical systems.
The question pertains to the grounding and bonding requirements for supply conductors that are paralleled in multiple raceways or cables. In such electrical installations, each raceway or cable must have a bonding jumper sized according to the conductors within the raceway or cable. This is important for safety and to ensure the electrical system is properly grounded. The bonding jumper functions to connect the raceways or cables electrically, and it must be able to carry potential fault currents. When multiple conductors are paralleled, the current and power in the circuit may increase, necessitating a correctly sized bonding jumper for overcurrent protection and to maintain the integrity of the grounding system. An essential function of the grounding system, including bonding jumpers, is to prevent a potential difference between grounded objects and the earth, which aids in protecting against electrical shocks and ensuring safe operation of electrical systems.
Additionally, grounding connections, as exemplified in the three-wire system, are designed to keep the neutral wire at zero volts relative to the ground, providing a safe path for electrical current and aiding in circuit protection. The grounding conductors and bonding jumpers are important elements in the electrical infrastructure that ensure safety and functionality.