ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Al Hildenbrand - Minneapolis - obituary
by Bill Addiss - 02/03/23 07:38 PM
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 69 guests, and 9 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#92557 03/24/05 10:51 AM
Joined: Mar 2003
Posts: 849
Y
Member
Article 392.12 & 392.13
392.12 gives impression cable tray must be sized Min. by the width of all cables laying side by side. 750 unshielded 5 kv cable =1.62. 1.62 x18= 29.16 inches = 30 " tray min.
392.13 (b) deals with Ampacity of single conductors in tray.
#1 laying side by side Copper 75% of table 310.69 , Covered (6 ft or more)70% 310.69

#2 Single row space of conductor in between =100% of table 310.69

#3 Conductors bundled (3 in a bundle A-B-C-phase) and a space of 2.15 x conductor size between = 310.67 100%.

Question Can bundles be put side by side???
Can try be Sized by width of bundles side by side? 1.62x2=3.24x 6(bundles)=19.44 tray say 24Inch?? ( I feel No)

Ampacity of bundled conductors side by side (If allowed) cause the code does not reference a side by side bundled arraigment.

I feel the Org. 30 inch and bunded with spacing is proper . Looking for Imput .

Yoopersup

Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

Joined: Oct 2000
Posts: 2,749
Member
Here's a link to the Cable Tray Institute, they may have an answer to the questions you raise.
http://www.cabletrays.com/


Joe Tedesco, NEC Consultant

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
The Watt Doctor
The Watt Doctor
Humble, TX
Posts: 440
Joined: December 2001
Top Posters(30 Days)
BigB 3
triple 3
Popular Topics(Views)
303,186 Are you busy
232,187 Re: Forum
216,931 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5