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Jan 19, 2018 at 17:16 vote accept cephirothdy2j
Jan 17, 2018 at 20:19 comment added Harper - Reinstate Monica Out west, they have rethought the prohibition on insulation around K&T, with some states repealing it, after long study revealed no effect whatsoever on house fires.
Jan 17, 2018 at 15:15 comment added Retired Master Electrician Maybe instead of me saying believe I should say prefer. In any case I prefer to replace antiquated systems before performing work on them. Also check out Article 394.12 Uses not permitted (5) "Hollow spaces of walls , ceilings, and attics where such spaces are insulated by loose, rolled, or foamed-in-place insulating material that envelopes the conductors." Basically your saying knob and tube can only be installed in uninsulated areas. @cephirothdy doesn't mention if it is an insulated ceiling or not.
Jan 17, 2018 at 6:16 comment added Harper - Reinstate Monica There's nothing wrong with Knob & Tube. Put an AFCI breaker on it, and don't give it any further thought.
Jan 16, 2018 at 14:07 history answered Retired Master Electrician CC BY-SA 3.0