I am looking to see if the NEC has any guidance on where you can cut a hole into your outdoor electrical panel. (To add a cable clamp). The existing pre-marked knockouts are either used or require running conduit and additional penetrations through the outer walls.
Is there guidance or rules for distance between holes/knockouts? Or from breakers or busbars to the holes? I know that code dictates some limitations about what angles/bends wires can make, so obviously there is a relationship between distance to a circuit breaker.
also i wouldn’t want to have an entry into the box too close to the hot busbars(?) as it would probably require turning off the whole panel to work safely and avoid accidental death or injury.
I’m thinking of going below the breakers/ busbars but want to know if I need to maintain any kind of distance or distance between other penetrations.
this question was similar but the question is more about conduit, Adding a new "knockout" to side of main electrical panel