Certified Data Centre Professional (CDCP) Practice Exam 2025 – All-In-One Study Resource to Ace Your Certification!

The ground resistance in a data centre is a critical aspect of electrical safety and equipment performance. A requirement for ground resistance to be less than 1.0 Ohm is often cited as a standard practice to ensure that the grounding system is effective in dissipating fault currents safely into the earth. This low resistance helps to prevent electrical shock hazards, protects equipment from lightning strikes, surges, and helps ensure reliable operation of sensitive electronic equipment by minimizing ground potential rise.

When the ground resistance is maintained below this threshold, it significantly enhances the reliability of the power and grounding systems within the data centre. A well-grounded data centre reduces the risk of damaging voltage differences which can compromise both safety and operational integrity.

While other values are acceptable in certain conditions, standards typically emphasize keeping the ground resistance under 1.0 Ohm to provide a safe environment for operation, thus making this option the most accurate choice in the context of maintaining best practices in data centre grounding.