On Thu, 10 Jun 2021 17:45:05 -0400, wrote:

On Thu, 10 Jun 2021 21:32:31 +0000, bob lang
wrote:

I installed knob and tube in the Cleveland area in the early 1960s.
We started to add a green ground and that's what finally killed it.
the cost increased by a third because of the ground and local jurisdictions
also argued over the best way to splice the ground.
Some allowed soldering while other insisted on a crimped connection.


New install - legal and inspected - of K&T in the 1960's ?
OK if you say so ..
John T.

It was legal in the 1968 code except for a few places.

Article 320

320-2. Use. (o) Open wiring on insulators may be used for exposed
work, either inside or outside building; in dry or wet locations;
where subject to corrosive vapors such as covered by Article 480; for
services as covered by Article 230, provided the requirements of this
Article are satisfied. (b) Open wiring on insulators shall not be used
(1) in commercial garages, (2) in theaters, (3) in motion-picture
studios, (4) in hoistways, and (5) in hazardous locations, except in
storage compartments of Class HI locations as provided in Section
503-3 (b).

Article 324 "Concealed K&T"
says pretty much the same thing.