What is the classification for two or more grounded electrodes that are bonded together?

The classification for two or more grounded electrodes that are bonded together is best described as a single grounding electrode system. This term refers to a configuration where multiple electrodes are interconnected, effectively functioning as a single entity for grounding purposes.

The essence of a single grounding electrode system is to ensure proper grounding and enhance the safety and effectiveness of grounding practices. By bonding multiple electrodes, the system can improve the overall ground fault return path, reduce the potential difference during fault conditions, and minimize the risks associated with electrical shock or fire hazards.

In contrast, other terms like exothermic grounding system typically relate to specific methods of installing ground electrodes, ring electrodes describe a circular grounding arrangement, and electrolytic grounding electrode deals with a particular type of grounding that utilizes the electrolytic process to function. Hence, these options do not appropriately fit the definition of multiple grounded electrodes that are bonded together as a unified system.