For dual-fed services, how should the grounding electrode connection be made?

In dual-fed services, it is important to maintain a single grounding electrode connection to ensure a safe and effective grounding system. A single grounding electrode connection facilitates the clear establishment of a reference point for ground potential, which is essential for the proper operation of protective devices and the overall safety of the electrical system.

Having just one grounding connection helps avoid potential differences that could occur if two separate connections were used. When there are multiple grounding paths, it can lead to circulating currents which can complicate fault detection and trip protective devices erratically. This is contrary to the principles of grounding, where the goal is to create a low-impedance path to ground for fault current to minimize the risk of electrical shock and equipment damage.

Thus, the standard practice for dual-fed services requires establishing a single grounding electrode connection, allowing for a unified grounding system that enhances safety and reliability.