Grounding of the units: Attach a ground wire from one of the threaded studs (A) at the bottom of the housing, to the mounting plate (B). The ground resistance between. Grounding is a mechanism to protect distribution equipment and people under normal operating conditions, abnormal operational (overcurrent and overvoltage) responses, and hazardous conditions such as shocks. This helps to reduce the potential difference that exists between conductive parts and the earth. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical. Few topics generate as much controversy and argument as that of grounding (or earthing as it is called in some countries) and the associated topics of lightning and surge protection of electrical and electronic systems. Knowledge of the various types of system grounding and performance characteristics is critical when designing or operating an electrical system. The voltage, system arrangement, loads connected, and continuity of. Navigating the grounding and bonding of electrical systems can be a tall task unless you have taken the time to familiarize yourself with the requirements of Article 250 of NFPA 70 ®, National Electrical Code® (NEC ®).