This article was posted 03/16/2007 and is most likely outdated.

Article 330 Metal-Clad Cable: Type MC - 330.30
 

 
Subject - Article 330 Metal-Clad Cable: Type MC

March 16, 2007  

Ask a Question |  Weekly Code GraphicQuizzes |  Free Stuff InstructorsOnline Training Products | Seminars | SubscribeUnsubscribe
[ image1 Post Comments | View Comments | Notify Me When Comments Are Added ] Web Page Version [Printer-Friendly]    
Article 330   Hi Res - Cable/DSL [16504Kb]
VIEWING Video FILE requires
Real Media Player [ FREE ]
Metal-Clad Cable: Type MC

330.30 Secured and Supported

Part III. Construction Specifications

This section was reorganized with editorial changes to add clarity and uniform interpretation. New subsection (A) General, give a title to the opening paragraph and include requirements that apply generally. The requirements for securing and supporting have been separated into (B) and (C), as they are two different issues.
(A) General. Type MC cable must be supported and secured by staples, cable ties, straps, hangers, or similar fittings, designed and installed not to damage the cable.

(B) Securing. Where installed on or across framing members, Type MC cable with four or less conductors sized no larger than 10 AWG, must be secured within 12 in. of every outlet box, junction box, cabinet, or fitting and at intervals not exceeding 6 ft. Figure 330-1

(C) Supporting. Type MC cable must be supported at intervals not exceeding 6 ft. Cables installed horizontally through wooden or metal framing members are considered secured and supported where such support doesn’t exceed 6 ft intervals. Figure 330-2

(D) Unsupported Cables. Type MC cable can be unsupported where the cable is:
(1) Fished through concealed spaces in finished buildings or structures, where support is impracticable; or
(2) Not more than 6 ft long from the last point of cable support to the point of connection to a luminaire or other piece of electrical equipment within an accessible ceiling.

For the purpose of this section, Type MC cable fittings are permitted as a means of cable support.
Figure 330-3


Figure 330-1
(Click on image to enlarge)


Figure 330-2
(Click on image to enlarge)


Figure 330-3
(Click on image to enlarge)

   
 

Click here to post a comment
[ View More Newsletters ] [ Send to a Friend ] [ Post Comments | View Comments | Notify Me When Comments Are Added ]

Copyright © Mike Holt Enterprises, Inc. All rights reserved.
This article is protected by United States copyright and other intellectual property laws and may not be
displayed or published on the internet without the prior written permission of Mike Holt Enterprises, Inc.

http://www.MikeHolt.com     1-888-NEC-CODE (1-888-632-2633)

Experiencing a Problem? Click Here

Comments
  • Mike,

    The third image in this message seems to contradict section 300.11 - "Cables and raceways shall not be supported by ceiling grids."

    Each of those 6' cables appear to be laying on the ceiling grid...perhaps I'm missing something?

    Thanks for all your work - it is much appreciated!

    Darren Emery

Reply to this comment
* Your Name:
   Your name will appear under your comments.

* Your Email:
   Your email address is not displayed.
* Comments:

This newsletter is closed to new comments.

Email Notification Options:
Notify me when a reply is posted to this comment
Notify me whenever a comment is posted to this newsletter