Questions tagged [knob-and-tube]
For questions about Knob and Tube electrical wiring throughout the home. Sometimes abbreviated as K&T.
73
questions
0
votes
2
answers
66
views
Did old knob and tube wiring tend to run hot and neutral wires separately?
I was drawing a diagram of cable runs through my 1920s house as I am planning to replace knob and tube with romex. Some are completely buried in the walls so there's some guesswork involved. As I was ...
- 969
1
vote
2
answers
78
views
What can be determined from a knob-and-tube inspection without opening walls?
We purchased a house (built in 1920) with some knob and tube wiring and are closing next week. Home has 3 bedrooms upstairs and 1 in basement and 2.5 baths. Around 1400 ft^2 plus finished basement. We ...
0
votes
0
answers
83
views
Can Nm 14/2 be pulled thru armorlite?
I have an older house that is 1920s. I was attempting to replace the old wire box/knob and tube when I noticed they had it buried in the wall from the switch to the ceiling. I have 14/2 nm cable. Can ...
- 11
2
votes
0
answers
63
views
Where am I likely to find a hidden NM-to-K&T splice? [closed]
I am trying to understand electrical work that was done on my house before I bought it. It's a 1922 build with a lot of original knob and tube wiring. What follows are some details, but the question ...
- 494
1
vote
0
answers
33
views
Need advice tracing and troubleshooting old to new wiring and an accidental ring circuit in 100 year old US house
I'm in the US (Minnesota) in 100 year old house that has a c.1980 Square D 150 amp panel. I am working to de-energize some knob-and-tube I've recently discovered that is buried under insulation in the ...
- 11
11
votes
2
answers
904
views
Run single strand of K&T wire through conduit under floor?
I have a contractor putting a pocket door in a wall in our 1925 house. He removed plaster from one side of the wall and exposed a single strand of Knob and Tube wiring right where the door needs to ...
- 111
0
votes
0
answers
80
views
New wire to knob and tube switch
I’m running new lights in a basement, and is almost fully updated wiring. But once you get into the wall the original knob and tube. My problem is my parents want the new lights run off the switch. ...
- 1
0
votes
1
answer
368
views
Are dual GFCI/AFCI breakers NEC code compliant with knob and tube wiring? [duplicate]
I have knob & tube wiring connected to a couple of standard breakers. Is it code compliant to upgrade the breakers to dual Afci/Gfci breakers instead of at the circuit end (at the receptacles)?
If ...
- 23
3
votes
3
answers
2k
views
Can a fuse panel supporting knob-and-tube wiring be replaced without a new feed or updated circuits?
Home built before 1910. It is a 3-story structure with plaster walls and some BX, some cable and a lot of knob and tube. In the hallway on the second floor is a fuse panel for that floor and some of ...
3
votes
1
answer
1k
views
Rewiring three way knob and tube
I'm rewiring part of my house to get rid of knob and tube. I found a weird situation:
A light socket in a stairwell has two wires: incoming hot and outgoing hot to upper switch.
Upper switch has 3 ...
- 215
2
votes
2
answers
140
views
What is this conduit / armored cable powering K&T circuit?
I have a knob-and-tube circuit in the ceiling of a basement of a 1941 house that was powering two lights and an outlet. Power comes in via a flexible armored cable and then the hot/neutral separate ...
- 135
5
votes
1
answer
977
views
Would knob and tube be used with modern conduit wiring?
Recently bought a single story house that was built in 1925, it has a basement and an attic space. I've doing some updates in it, and have noticed some confusing things with the electrical wiring. ...
- 51
3
votes
1
answer
268
views
What kind of wiring is this?
Single conductor in a very rigid rubbery or tar like jacket. Almost like a knob and tube with an outer jacket that is like a continuous tube. This stuff is long-ago decommissioned but I'm just ...
- 41.8k
2
votes
2
answers
225
views
Should an older Knob and Tube rubber-coated 14-gauge conductor be protected with a 15-amp breaker, or a 12-amp fuse?
Recently I found an article saying all Knob and Tube circuits need to be protected with a 15-amp breaker or fuse. I know the modern small conductor wiring rule (NEC 240.4(D)) limits 14 AWG to 15A for ...
- 1,056
0
votes
1
answer
2k
views
GFCI protect "load side" without ground? [duplicate]
I have an old house with a lot of knob & tube (and some sort of slightly newer but still ungrounded) wiring.
The previous owner replaced most outlets with 3-prong ungrounded. To improve safety I ...
- 156