Home Inspection Electrical Practice Test

What is the purpose of a grommet in electrical installations?

1. To enhance electrical conductivity

2. To protect cable from sharp edges

3. To serve as a junction box

4. To extend cable length

The correct answer is: To protect cable from sharp edges

The purpose of a grommet in electrical installations is primarily to protect cables from sharp edges. When cables pass through metal or other potentially hazardous surfaces, they can be exposed to cuts or abrasions that may compromise their integrity. A grommet, which is typically made of rubber or plastic, provides a protective barrier at the opening, ensuring that any sharp edges do not come into direct contact with the cable. This safeguarding helps to prevent damage that could lead to shorts, failures, or even fire hazards in the electrical system. The other options do not accurately represent the function of a grommet. For example, while enhancing electrical conductivity and serving as a junction box are important in electrical installations, those roles are accomplished by different components such as connectors and junction boxes themselves. Similarly, extending cable length is achieved through additional cabling or connectors, not through grommets. Therefore, the role of a grommet is specifically and critically focused on providing protection against physical damage.