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

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
1 registered (gfretwell), 313 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#80657 - 05/05/02 05:20 PM romex in small office?
silverbk Offline

Registered: 02/24/01
Posts: 61
I have been contracted to wire a small free standing office one story wood on slab construction approx 25 x 25.

It looks like a romex job, but I have been told that the inspector wants MC cable. His reasoning that it is a place of assembly.

Bldg has it's own service and will be used a an office to rent self storage units.

With my understanding of the code single story commercial, romex is acceptable. Place of assembly means 100 people or more, and bx would now be accepatble there also.

2014 / 2011 NEC & Related Books and Study Guides
#80658 - 05/06/02 04:45 PM Re: romex in small office?
frodo Offline

Registered: 05/16/01
Posts: 129
Loc: louisville, ky usa
first, i would speak to the inspector. then quote the code.

i think building construction dictates wiring methods..

take for instance a three story dormitory..this may be considered a place of is built out of wood and wired with romex...i would be shocked if your inspector would require this building to be wired with a/c cable? even motels get romex..

i would use romex if the ahj will go along with it..if not a/c cable is not too bad but it is more expensive, time consuming and whole lot dirtier..

good luck



#80659 - 05/07/02 04:30 AM Re: romex in small office?
Redsy Offline

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
I don't believe it to be a Place of Assembly.
I would like opinions on whether a commercial office complex that employed 300 people is considered a place of assembly.
I don't think so, because more than 100 people are not congregating in one area.(I wonder about a large area that holds more than 100, but has cubicles separating them) However a conference room or cafeteria in the same building that holds in excess of 100 people would be considered a place of assembly.
Please comment on the above situations.

#80660 - 05/07/02 08:42 AM Re: romex in small office?
Tom Offline

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
This is one inspector that has been standing out in the sun too long. He needs to take a look at NFPA 101 Life Safety Code.

Areas of assemblyof concentrated use allow for 7 sq ft per person which means only 89 would be allowed in your room (based on my really old copy). Not to mention that he has totally missed the boat on what a place of assembly is.

He could have a point about any wiring above a dropped ceiling though.

Few things are harder to put up with than the annoyance of a good example.

#80661 - 05/07/02 02:08 PM Re: romex in small office?
dana1028 Offline

Registered: 01/09/02
Posts: 163
Loc: San Carlos, CA
Redsy - "I wonder about a large area that holds more than 100, but has cubicles separating them"

Any room still must 'qualify' under other building code definitions to constitute a place of assembly. The building code and NEC lists those spaces that fall under areas that could qualify as places of assembly. A 12,000 sf room with 120 cubicles (100 sf load factor per code) does not become a place of assembly because there are more than 100 people in the is still an office space.

#80662 - 05/18/02 08:43 AM Re: romex in small office?
Frank Cinker Offline

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
NEC 518.2(A) gives many examples of places of assembly. NM cable seems perfectly acceptable for "silverbk" application.


#80663 - 05/18/02 09:12 AM Re: romex in small office?
resqcapt19 Offline

Registered: 11/10/00
Posts: 2209
Loc: IL
If you use NM cable, be careful of the new rule in 334.12.
334.12 Uses Not Permitted.
(A) Types NM, NMC, and NMS. Types NM, NMC, and NMS cables shall not be used as follows: (1) As open runs in dropped or suspended ceilings in other than one- and two-family and multifamily dwellings.



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