ECN Forum Forums Code Related Discussion NEC & other Code issues Mixing of equipment on a panelboard?

That true only if the states did adpoted the new code cycle IIRC it in the 08 edition but I know few states rejected or modifed the codes.

If they did allow it but the market demand is not really huge at the moment but it slowly catch up and in France we did got rid of 32 circuit limit as well that was bunch of connires { BS }

As speaking of larger panels {42 and larger circuits } did the tub width increase or still the same width ? { 14.5 inches or 368mm }

Merci,
Marc

Marc:

The Sq D NQOD is a 20" wide backbox. I have not looked at any other mfg. It may be tough to get the conductor space (volume) and KO's in the 14.5" backboxes.

Can anyone explain the logic(?) behind the 42 circuit limit?

I think it was just an arbitrary number someone picked.
Maybe Joe knows which cycle it came in. I doubt the ROP is easy to find tho.

Had to do with a fire in a NYC hotel Forty-Two Circuit Restriction look here for some information:

It is interesting that this whole topic was considered to be "inoperative" by the 2008. "42" is gone and they do not have the "lighting and appliance" distinction anymore.

I was curious how old "42" was tho since it has been around as long as I can remember, certainly since the Nixon administration. I see your article puts it back to 1933.