For wires connecting to breakers in a new panelboard, if some are cut too short, what does the NEC state about splicing with wire nuts?

The National Electrical Code (NEC) allows splicing wires with wire nuts under specific conditions, particularly when the conductors are cut too short to reach the termination points in a panelboard. In this context, splicing can provide a solution to maintain proper connections without the need to replace an entire length of wire, which can be impractical.

When splicing wires, the NEC emphasizes the importance of ensuring that all connections are made correctly, adhering to the code's provisions for compatible wire sizes and types, and ensuring that the splices are properly insulated and protected from physical damage or moisture. The use of wire nuts is common and acceptable in this scenario when done under the correct guidelines. This flexibility allows electricians to address issues of length while still ensuring a safe and efficient electrical system.

However, with some options indicating restrictions or prohibitions, it's essential to note that while splicing is allowed, it must be done according to NEC regulations and best practices to ensure safety and functionality. This reinforces the notion that while splicing may be regularly practiced and permitted, it must always be executed with caution and care to maintain system integrity and safety.