New York State Master Electrician Practice Exam

When reducing electrical noise for electronic equipment, what can nonmetallic fittings or spacers terminate on?

1. Non-listed fittings

2. Listed fittings

3. Only metal raceways

4. Plastic components

The correct answer is: Listed fittings

When reducing electrical noise for electronic equipment using nonmetallic fittings or spacers, it is important to understand that these components should terminate on listed fittings. Listed fittings are those fixtures and connectors that have been tested and meet specific standards set by a recognized testing laboratory, ensuring safety and performance in electrical installations. Using listed fittings with nonmetallic components is crucial because it ensures compatibility and adherence to safety codes, which can help mitigate risks associated with electrical noise interference. These fittings are designed to function effectively with nonmetallic materials, allowing for proper grounding and shielding against interference that can disrupt electronic performance. In contrast, non-listed fittings may not have undergone the same rigorous testing for electrical performance and safety, which could lead to inadequate noise reduction or potential hazards. Plastic components and metal raceways do not directly relate to the termination of nonmetallic fittings; while they may play roles in arrangements that reduce noise, the focus here is on ensuring that nonmetallic fittings end at components that are certified and reliable for such applications.