ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Do we need grounding?
by gfretwell - 04/06/24 08:32 PM
UL 508A SPACING
by tortuga - 03/30/24 07:39 PM
Increasing demand factors in residential
by tortuga - 03/28/24 05:57 PM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 390 guests, and 28 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#109438 08/19/03 07:29 PM
Joined: Oct 2000
Posts: 3,682
Likes: 3
Admin Offline OP
Administrator
Member
[Linked Image]
Quote
This transformer was marked that it needed 6" air space front and rear.

It is heavily loaded 24/7 and the top was to hot to touch.

It was pushed back tight to the wall.

Bob (iwire)

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#109439 08/19/03 08:18 PM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Understand that {economy} dry-type transformers are often rated at 150°C rise—which means the hottest part of the transformer can run 270°F above room temperature at rated load. Hence, the logic behind the labeled clearance requirement.

#109440 08/19/03 08:41 PM
Joined: Aug 2002
Posts: 1,081
T
Member
Did they at least offer you lunch?

[Linked Image from 65.108.216.53]


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5