The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Topic Options
Rate This Topic
#621 - 02/14/01 02:34 PM nm cable
sam Offline
Member
Registered: 01/02/01
Posts: 29
when is it not okay to use romex cable? refering to the number of people that are to be using the building ? is it 100 persons.
Top
Work Gear for Electricians and the Trades
#622 - 02/14/01 03:52 PM Re: nm cable
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 4196
Loc: NY, USA
Sam,

If you have a code book see Article 336-5 Uses not permitted (for starters) and it lists a number of things. I'm not a good typer and it would take awhile to type out all of them - maybe someone else has it on Cd and can paste it here.

Bill
Top
#623 - 02/14/01 06:01 PM Re: nm cable
sparky Offline
Member
Registered: 10/18/00
Posts: 5545
sam;
check the handbooks expert text in "places of assembly"
Top
#624 - 02/20/01 09:42 AM Re: nm cable
dturner Offline
Member
Registered: 02/20/01
Posts: 16
Loc: Harrisburg PA USA
336-4. Uses Permitted
Type NM, Type NMC, and Type NMS cables shall be permitted to be used in the following:
1. One- and two-family dwellings
2. Multifamily dwellings and other structures, except as prohibited in Section 336-5
3. Cable trays, where the cables are identified for the use
FPN: See Section 310-10 for temperature limitation of conductors.
(a) Type NM. Type NM cable shall be permitted for both exposed and concealed work in normally dry locations. It shall be permissible to install or fish Type NM cable in air voids in masonry block or tile walls where such walls are not exposed or subject to excessive moisture or dampness.
(b) Type NMC. Type NMC cable shall be permitted as follows:
1. For both exposed and concealed work in dry, moist, damp, or corrosive locations
2. In outside and inside walls of masonry block or tile
3. In a shallow chase in masonry, concrete, or adobe protected against nails or screws by a steel plate at least 1/16-in. (1.59-mm) thick, and covered with plaster, adobe, or similar finish
(c) Type NMS. Type NMS cable shall be permitted for both exposed and concealed work in normally dry locations. It shall be permissible to install or fish Type NMS cable in air voids in masonry block or tile walls where such walls are not exposed or subject to excessive moisture or dampness. Type NMS cable shall be used as permitted in Article 780.
336-5. Uses Not Permitted
(a) Types NM, NMC, and NMS. Types NM, NMC, and NMS cables shall not be used in the following:
1. In any multifamily dwelling or other structure exceeding three floors above grade
For the purpose of this article, the first floor of a building shall be that floor that has 50 percent or more of the exterior wall surface area level with or above finished grade. One additional level that is the first level and not designed for human habitation and used only for vehicle parking, storage, or similar use shall be permitted.
2. As service-entrance cable
3. In commercial garages having hazardous (classified) locations as provided in Section 511-3
4. In theaters and similar locations, except as provided in Article 518, Places of Assembly
5. In motion picture studios
6. In storage battery rooms
7. In hoistways
8. Embedded in poured cement, concrete, or aggregate
9. In any hazardous (classified) location, except as permitted by Sections 501-4(b), Exception, 502-4(b), Exception, and 504-20
(b) Types NM and NMS. Types NM and NMS cable shall not be installed in the following:
1. Where exposed to corrosive fumes or vapors
2. Where embedded in masonry, concrete, adobe, fill, or plaster
3. In a shallow chase in masonry, concrete, or adobe and covered with plaster, adobe, or similar finish
Top

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Recent Posts
Looking for older post
by sparkyinak
Today at 12:27 AM
License exam
by TRUE POWER
Yesterday at 11:33 PM
Members: Non-Members: Did you know?
by Admin
Yesterday at 02:34 PM
Safety at heights?
by HotLine1
01/21/17 08:51 PM
International Wire Colour Codes
by Texas_Ranger
01/21/17 03:29 PM

Who's Online
0 registered (), 69 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
New in the Gallery:
Desk-mounted "power-board"
Top Posters
gfretwell 9066
Trumpy 8560
pauluk 7693
HotLine1 6833
sparky 5545
Member Spotlight
Tom
Tom
Member Since: 01/01/01
Posts: 1069

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals