Originally Posted By: jsmith3 This post was automatically imported from our archived forum.
I ran across some 12-2 w/g wire and the grd was insulated and it looked like 16 gauge, the jacket said Dodge Phelps 12-2 w/g. Has any one seen this before and how could I write this?
Originally Posted By: mcyr This post was automatically imported from our archived forum.
If it had PVC jacketing it was most likely a sub-sequent change from the asphaltic permeated cloth wrap.
Prior to 1954, AWG 14, and AWG 12 had no ground wire and prior to those years had a bare ground of two wire size smaller.
The NEC however is set up so that a house wired 35 years ago if it met the NEC rules at the time of original installation shall forever be governed and controlled by that version of the NEC active when it was originally wired.
Originally Posted By: James D Mosier This post was automatically imported from our archived forum.
Marcel,
I have read on this site that electrical work requiring a permit (wouldn't that be all electrical work?) being done in older homes has to be upgraded with items such as smoke alarms and possibly GFCIs and AFCIs.
Does your last paragragh pertain only to the type of wiring used?
Originally Posted By: mcyr This post was automatically imported from our archived forum.
Hi. James;
Here in Maine, work done in an existing house that requires a permit will usually necessitate the electrician to bring up to code whatever he touches. This would mean in my opinion, that whatever work he does to expand or improve needs to be brought up to code to the source. Tapping into work that is not up to code would be in violation of the NEC. All other work done under the permit that have not been touched or impaired, can stay the way it is unless some safety hazard is discovered while working on the system. In that case, the electician needs to bring it up for discussion with the owner and point out the hazard. This situation with all the lawsuits around is getting pretty touchy.
Possibly, other electrical background Home Inspectors can elaborate on this subject. I am just quoting what electricians on my full time job have informed me.
Originally Posted By: Greg Fretwell This post was automatically imported from our archived forum.
Certainly an AHJ can make any rule they like but the NEC does not say things like " Tapping into work that is not up to code would be in violation of the NEC."
For example you are specifically allowed to "extend" a Knob and Tube circuit.
I also doubt most AHJs would demand AFCIs if you added another outlet like, a smoke detector, to the bedroom circuit.
If so people who have bedrooms wired via a multi-wire circuit would be ripping out drywall.
Originally Posted By: dandersen This post was automatically imported from our archived forum.
{NEC 324-3} Knob and Tube can be “repaired”. No new installations allowed.
Adding 12/2 to a K/T circuit is not a repair.
Effective January 1, 2002, NFPA 70, The National Electrical Code (NEC), Section 210-12, requires that all branch circuits supplying 125V, single phase, 15- and 20-ampere outlets installed in dwelling unit bedrooms be protected by an arc-fault Circuit interrupter.
If you add a bedroom you will have to install.
If you change 2 prong plugs with 3 prong plugs you had better find a ground. They still sell 2 prong outlets (if you don't have grounded wire).
Originally Posted By: Greg Fretwell This post was automatically imported from our archived forum.
"{NEC 324-3} Knob and Tube can be “repaired”. No new installations allowed."
You have to go back to 1999 for that reference but the 99 code says
"extensions of existing installations", the word "repair" is not there.
In 2002 this moved to 394
394.10 Uses Permitted.
Concealed knob-and-tube wiring shall be permitted to be installed in the hollow spaces of walls and ceilings or in unfinished attics and roof spaces as provided in 394.23 only as follows:
(1) For extensions of existing installations
(2) Elsewhere by special permission
You can also extend K&T with a number of chapter 3 wiring methods, including NM cable. Metalic raceways or boxes will require you to come up with a ground.
