A rubber wire grommet primarily provides an interface at a specified cable opening. It helps reduce abrasion of intact insulation at that location.
The grommet does not automatically provide rated electrical insulation, a water seal or protection from an overheating cable. Those functions need appropriate specifications and assessment of the complete installation.
Measure the opening, panel thickness and cable passage, including connector clearance. Choose the compound for the actual operating conditions and provide suitable cable support. After installation, check seating and ensure that the cable is not pinched, sharply bent or contacting an exposed edge.
