I do some work in South Philly, were there is a lot of old brick fronts that need replacing. When the fronts are being replaced, the contractor puts pvc in between the two layers of brick, from the basement to the second floor and pops out with a 90, to where the service is to be attached. Noboby wants to see pvc or service cable on a new front. Then the EC comes in and does the service. Is this legal or not?
The disconnecting means and the OC device must be located inside or outside, nearest the point of entrance of the service conductors. Service conductors have no short circuit or ground fault protection, so if there is a problem with the conductor insulation inside the conduit, it will spark and arc undetected until it melts clean through the PVC and may burn the building down. A safer installation would be rigid metal conduit, but that would only take a little longer to burn through.
[This message has been edited by earlydean (edited 05-30-2006).]
I notice this more and more as I like to look at services whenever I'm out and about. I don't like the design of hiding the pipe, but it sure seems like it's legal to do, as long as it's in pipe. SE cable is a different story.
The only question I would have is how is that void between the brick verniers capped at the top? If this is a "chimney" into the attic it is still "inside" the building. If it is capped with more than 2" of mortar, brick or concrete, across the whole bay where the SE resides, it would be OK by me. A wood top plate would not suffice.
I don't know if it is ok in Philly or not, but I sure miss the hoagies and cheesesteaks and the real pizza. I used to work in the shipyard until it closed,as a machinist, then got transferred to DC, became an electrician, and finally retired to NC. I don't know who the AHJ is in South Philly, but there was a time, I have been told, that a C note was required before the permit was signed off. Another thing to note is the homes don't look like much outside, but some contain 18 karat gold bathroom fixtures, imported Italian marble floors, front doors costing thousands etc...
This is one issue we wouldn't have here in Florida. Masonry walls are capped with a 16" tie beam of poured concrete and rebar along with solid corners and window/door frames. You never have more than 5' of wall without a poured cell. Bury a pipe in there and it is "encased"
No maximum distance is specified from the point of entrance of service conductors to a readily accessible location for the installation of a service disconnecting means. The authority enforcing this Code has the responsibility for, and is charged with, making the decision as to how far inside the building the service-entrance conductors are allowed to travel to the main disconnecting means. The length of service-entrance conductors should be kept to a minimum inside buildings, because power utilities provide limited overcurrent protection and, in the event of a fault, the service conductors could ignite nearby combustible materials. Some local jurisdictions have ordinances that allow service-entrance conductors to run within the building up to a specified length to terminate at the disconnecting means. The authority having jurisdiction may permit service conductors to bypass fuel storage tanks or gas meters and the like, permitting the service disconnecting means to be located in a readily accessible location. However, if the authority judges the distance as being excessive, the disconnecting means may be required to be located on the outside of the building or near the building at a readily accessible location that is not necessarily nearest the point of entrance of the conductors.
That said, I often run (required) RMC in the exterior WOOD walls, and have been allowed 35'+ inside the building with varying opions from different AHJ's. Good idea to always ask before jumping in too far.....
Mark Heller "Well - I oughta....." -Jackie Gleason