Why is it important to directly connect all metallic shielding?

Directly connecting all metallic shielding is crucial for ensuring proper grounding in various electrical and mechanical systems. Grounding provides a safe path for electrical currents to return to the ground in case of a fault, thus protecting both the equipment and personnel from electric shock. When metallic shields are connected, they help in forming a continuous conductive path that can facilitate effective grounding. This reduces the risk of electromagnetic interference and potential hazards associated with electrical faults.

In contrast, although meeting regulatory requirements and avoiding additional installation costs may be considerations in installation processes, they do not directly relate to the technical necessity of grounding. Aesthetic reasons play no role in the functional safety and performance of metallic shielding. Therefore, proper grounding remains the most significant reason for ensuring all metallic shielding is directly connected.