will5443 wrote:Have an older Square D panel, maybe 20 years old with 62 total circuits in the box. The NEC used to allow no more than 42. Now I am seeing they changed to code to what the panel box is rated for. How would that apply to an inspection done today?
That older Square D panel probably has some piggyback breakers it. Provided the piggyback breakers are in their allowed spaces (refer to the schematic as it will show which spaces those are allowed to be in).
New panels are designed and approved to the new code and revised standard, neither of which apply to the older panel.
If you were to install that older panel today (reuse it), it may very well not be approved, but why would you want to reuse an older panel anyway?
The listing and labeling information, which includes the nameplate information and any and all manufacturer's installation instructions, including the schematic and label on the panel, tells the installer - and the inspector - how that particular panel is allowed to be installed ... that is how the inspection should be done, both 'back then' and 'today'.