Actually the National Electrical Code is updated every three years, not
every year. While it does date back to the early years of the last century,
it has kept up to date with new materials and technology. As an example,
they added a section on recharging stations for electric powered cars some
time ago. There are sections on computer networks and wiring systems to
allow for the use of switching power supplies. ( They can overload the
neutral conductor.) Some areas do not 'adopt' the NEC as their standards.
The state of Oregon reviews it each issue, adds their own 'Adendum' and
adopts the package about six months after issue.

The NEC has been re-written to make itself more universally accepted. Some
foreign countries are considering using it for their requirements. It is far
from obsolete.

Rusty O