3 ms·
This depends entirely on their code cycle. Those that keep up actually don't have much issue as it's gradual. Current breakdown is: 25 states - 2020+ NEC 17
by DannyBee 4y ago
This depends entirely on their code cycle.
Those that keep up actually don't have much issue as it's gradual.
Current breakdown is:
25 states - 2020+ NEC
17 states - 2017 NEC
2 states - 2014 NEC
2 states - 2008 NEC
8 states - Very local
Some of them take 5+ years to update the NEC. Virginia adopted the 2017 NEC in late 2021.
When that happens, upgrades can be costly.
Though most major changes around AFCI/GFCI usage, pipe types, etc to NEC happened in the 2014/2017 code cycle.
So there were definitely some code cycles that were "extra bad" in this sense.