HOLT Electricians Practice Exam

According to the NEC, what is required to prevent electrical hazards when using flexible cords?

1. Using them in outdoor settings

2. Not transmitting tension to connections

3. Using longer lengths without joints

4. Only in dry locations

The correct answer is: Not transmitting tension to connections

Using flexible cords involves certain considerations to ensure safety and compliance with the National Electrical Code (NEC). One key requirement is that tension should not be transmitted to the connections, which is crucial for several reasons. When flexible cords are used, any tension or pulling force applied to the cord can lead to stress at the connection points. This stress can compromise the integrity of the connectors, potentially leading to loosening or failure. If a connection becomes loose or breaks, it can result in arcing or overheating, both of which are serious electrical hazards. Therefore, securing the flexible cord in a manner that does not apply tension at the connections is critical for maintaining safe and reliable electrical operation. The other options may not adequately address the risks associated with electrical connections involving flexible cords. For example, using flexible cords outdoors does not inherently mitigate hazards unless other protective measures are in place. Similarly, utilizing longer lengths without joints and restricting usage to dry locations may not necessarily prevent tension issues at the connections. Hence, the requirement to avoid transmitting tension emphasizes the importance of maintaining a safe connection environment when working with flexible cords.