Certified Data Centre Professional (CDCP) 2025 – 400 Free Practice Questions to Pass the Exam

To reduce the impact of common mode noise, isolating transformers is an effective method. Common mode noise often arises from variations in the ground potential that can affect the signals in communication or power systems. When transformers are isolated, they help to break the direct electrical connection between circuits, thereby providing a barrier that can effectively reduce noise transmission.

Isolating transformers can help in maintaining signal integrity by ensuring that any noise, which is typically introduced through ground loops or shared paths, does not propagate to sensitive equipment. This allows for better performance of electronic devices and data integrity, particularly in environments such as data centers where reliable operation is critical.

In contrast, using longer cable runs can exacerbate the problem of common mode noise due to greater exposure to interference over the distance. Increasing voltage levels does not address the noise issue and could increase the risk of insulation breakdown or equipment damage. Connecting all equipment to a single phase might not mitigate common mode noise effectively; instead, it could create a larger common ground path for noise, potentially amplifying the problem rather than solving it.