Recently, I attended a webinar that addressed scenarios in which, due to elevated Zs values, a molded case circuit breaker (MCCB) was unable to achieve the disconnection times within the maximum permissible Zs values. The proposed resolution involved the implementation of additional protection through supplementary bonding exclusively at the intake position. However, one might consider whether this protective measure should extend to all equipment within the specified location, thereby necessitating supplementary bonding at the load end as well. What are your thoughts ?
