What should be ensured if a grounding connection is made at both the source and first disconnecting means?

When a grounding connection is made at both the source and the first disconnecting means, it is crucial that it does not create a parallel path for the grounded conductor. Establishing a second grounding connection can lead to multiple grounding points for the same system, which can inadvertently create parallel paths for fault currents. This situation can compromise the effectiveness of the ground fault protection systems, introduce potential differences between the grounding points, and create safety hazards.

A single grounding connection is essential in maintaining the integrity and safety of the grounding system. The primary purpose of grounding is to provide a low-resistance path to direct fault currents safely to the earth, minimizing the risk of electrical shock and ensuring the reliable performance of electrical equipment. If there are multiple grounding points, it could lead to complications that increase the risk of electrical failures and potentially hazardous conditions.

Thus, ensuring that only one grounding point exists in a given portion of the system is vital for effective grounding and bonding practices.