is nmd in raceway ok?
#1
10-16-17, 06:31 AM
is nmd in raceway ok?
We have an apartment in a building that is over 100 years old. It looks like at some point in the past, someone installed nmd to make a circuit of receptacles in the lounge but they just stapled the nmd to the baseboard and painted over it (wall is plaster not drywall).
I don;t want to spend too much on redoing these circuits so am wondering if I can install a raceway over the top of the nmd?
Found this somewhere - is this old?
Section 336-6 permits NM cable to be installed in exposed locations and has permitted this installation technique since the introduction of NM cable into the Code in the 1930s. If installed exposed, the cable must closely follow the building surface or be installed on running boards. The NM cable must also not be installed in an area where the cable may be damaged or subjected to any physical abuse that might affect the safe operation of the system.
I don;t want to spend too much on redoing these circuits so am wondering if I can install a raceway over the top of the nmd?
Found this somewhere - is this old?
Section 336-6 permits NM cable to be installed in exposed locations and has permitted this installation technique since the introduction of NM cable into the Code in the 1930s. If installed exposed, the cable must closely follow the building surface or be installed on running boards. The NM cable must also not be installed in an area where the cable may be damaged or subjected to any physical abuse that might affect the safe operation of the system.
#2
10-16-17, 08:23 AM
NM installed on the surface of baseboard is considered a location that's subject to damage. It needs to be placed in a conduit sleeve, or on the side of a running board that provides protection.
#4
10-16-17, 02:04 PM
Subject to damage is always at the discretion of the inspector. Generally they will not allow it stapled on the surface of the walls, sometimes they will allow it on the ceilings.
You could install wiremold raceway over top of the NM. That would provide required protection for a surface-mount installation.
For other kinds of raceway like EMT or PVC conduit, yes you can use that with NM, but in most cases only one cable can go through the conduit.
You could install wiremold raceway over top of the NM. That would provide required protection for a surface-mount installation.
For other kinds of raceway like EMT or PVC conduit, yes you can use that with NM, but in most cases only one cable can go through the conduit.
#6
10-18-17, 02:44 PM
I would ask the inspector whether they consider that subject to damage . I would not . Look at the wall near it to see if it is damaged. How long has the cable been there and is it damaged ?
A closer image shows one splice for the hot conductors and one for the neutral conductors.
Yet in the bundle of neutral conductors, you can see one of the conductor runs into the mounting hole on the side of the metal box. I pulled on the conductor and it seems to be secured.
What is that for? Is it another way to bond the neutral conductor to the box?
I then opened three more switch boxes and saw a similar pattern, one neutral conductor going into the box mounting nail hole. :confused: