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

Topic Options
Rate This Topic
#101677 - 11/06/02 01:01 PM Panelboards used as Junction Boxes
Tony Moscioni Offline
Moderator
Registered: 05/15/01
Posts: 144
Loc: CANADA
Enclosures for overcurrent devices are permitted to be used as junction boxes provided the wiring is being added to an enclosure forming part of an existing installation and the conductors and splices do not fill up the wiring space at any cross-section to more than _________of the cross sectional area of the space.

A. 40% b. 53% c. 31% d. 75% Rule #


d. 75%

Rule 12-3034(2)(b). Paraphrased, the CEC Handbook Intent for this rule states "Where wiring is required to be added to an existing installation, the Rule permits the existing enclosures to be used as junction boxes or as raceways provided that the conductors, splices, and taps do not fill the cross-sectional area of the space to more than 75% and that conductors run through the enclosure do not fill the wiring space at any cross-section to more than 40% of the cross-sectional area of the space.

This is an exception for existing installations only and is not an acceptable practice for new installations where the design can incorporate the required enclosures for the wiring systems."


Tony Moscioni
Electrical Inspector
Electrical Safety Authority
Top
Tools for Electricians:

Member Spotlight
Member Since: 01/22/05
Posts: 5316
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 54 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 51
HotLine1 43
gfretwell 17
Trumpy 16
Ruben Rocha 13
 
Newest Members
clee512, Jdscott2005, FAIZAN, Regitest2, sureshazhagai

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