Electrician's Licensing Practice Exam

Which of the following is NOT one of the methods of making connections according to NEC Section 250-8?

1. Terminal Bars

2. Exothermic Welding

3. Pressure Connectors Listed As Ground and Bonding Equipment

4. Wire Nuts

The correct answer is: Wire Nuts

The correct answer is that wire nuts are not listed as one of the methods for making connections under NEC Section 250-8. This section specifically outlines acceptable methods for making electrical connections related to grounding and bonding. Terminal bars, exothermic welding, and pressure connectors are all explicitly recognized methods for these applications. Terminal bars provide a secure point for multiple wires to connect to a ground. Exothermic welding involves a chemical reaction that generates heat, allowing for a strong bond between conductors. Pressure connectors are specifically labeled for use in grounding and bonding applications, ensuring they meet the necessary standards for reliability and safety. In contrast, wire nuts are primarily used for joining wires in splicing applications for normal electrical installations and are not suitable for grounding or bonding connections as outlined in the NEC. This distinction is crucial for electricians to understand when working to comply with electrical codes and ensuring safety in their installations.