Yes, stranded wire is acceptable for use in a breaker box. In fact, it is one of the most commonly used types of wire for connecting circuit breakers to loads. Here are some reasons why stranded wire is a good choice for breaker box wiring:
Flexibility: Stranded wire is made up of small strands of wire that are twisted together. This makes the wire more flexible than solid wire, which can make it easier to work with in tight spaces and when routing wire through conduit or other channels.
Less breakage: Stranded wire is more resistant to breaking than solid wire, because the individual strands can distribute the load more evenly. This can be especially important in breaker boxes, where the wire is subject to repeated bending and stress.
Better contact: Stranded wire can provide better contact than solid wire, especially in applications where the wire needs to be disconnected and reconnected frequently. The multiple strands of wire can create a larger contact area than a single solid wire, which can reduce the risk of arcing and other electrical problems.
Overall, stranded wire is a safe and reliable choice for use in breaker boxes, and is preferred by many electricians and DIY enthusiasts.