ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by gfretwell. 10/19/17 01:02 AM
Generator Cable Sizing
by brsele. 10/18/17 07:39 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,417 Are you busy
177,389 Re: Forum
168,990 Need opinion
Who's Online Now
0 registered members (), 16 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#118298 - 09/03/04 01:26 AM Overloaded Panel  
Admin  Offline

Joined: Oct 2000
Posts: 3,458
This picture shows a 200 amp. service panel that should be good for 40 circuits. However if you look real close you will see 53 circuit breakers in there using 2 pole breakers, single pole breakers and twin breakers (or half size breakers). I believe this panel was an ITE Siemans 40-40 Main Breaker 200 amp service panel. I think that the label 40/40 means that only 40 full size breakers are allowed. I find that too many contractors try to install too many breakers in a panel before they check the manufacturers instructions. (Section 110.3 (B) ) as per the manufacturers instructions.

- Harold
[Linked Image]

(submitted via Joe Tedesco)

[This message has been edited by Webmaster (edited 09-03-2004).]

Tools for Electricians:

#118299 - 09/03/04 10:02 AM Re: Overloaded Panel  
electricman2  Offline
Joined: Nov 2003
Posts: 269
Thomasville, NC USA
Siemans makes a non-CTL duplex breaker for replacement use, but there is nothing to prevent its use in panel spaces intended for single breakers.


#118300 - 09/03/04 11:53 AM Re: Overloaded Panel  
SolarPowered  Offline
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
What do ya bet the little white stickers on every one of the tandem breakers say, "Don't do this?"

#118301 - 09/03/04 03:01 PM Re: Overloaded Panel  
e57  Offline
Joined: May 2003
Posts: 2,876
Dont know about the little stickers, but the big one on the door does!

Mark Heller
"Well - I oughta....." -Jackie Gleason

#118302 - 09/03/04 05:58 PM Re: Overloaded Panel  
harold endean  Offline
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
By the way, I put that white approval sticker on the door when I did my service inspection and the panel was in complience. I also left them a red violation inspection sticker on the final when I saw what they did between the time of the service inspection and the final inspection.


#118303 - 09/23/04 12:37 AM Re: Overloaded Panel  
OreElect  Offline
Joined: Mar 2004
Posts: 98
Is this one worth entering in the Guiness book of records?

#118304 - 09/23/04 01:06 PM Re: Overloaded Panel  
SolarPowered  Offline
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
No, don't do that. You could easily get another 17 circuits in there. With a bit of effort with 240V tandems, you could get quite a few more than that. Pretty soon there'd be a post here showing 84 poles in a 42-space panel.

And then with a little creativity with some non-bus-mounted breakers and a nibbler, you could go even higher. And don't even think about what they might do with panels imported from Canada!

[This message has been edited by SolarPowered (edited 09-23-2004).]

#118305 - 09/30/04 11:21 PM Re: Overloaded Panel  
John Steinke  Offline
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
I never did understand the basis for the 42-circuit rule; maybe we should re-visit it.

Wouldn't more dedicated circuits tens to make things safer, and easier to troubleshoot, than fewer?

Finally, the panel may not br 'overloaded' in the sense that it may never draw anywhere near 200 amps.

(Oh, I do much prefer there to be many sub-panels, rather than having everything go to one place).

Member Spotlight
Delaware County, PA, USA
Posts: 186
Joined: November 2005
Show All Member Profiles 

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.019s Queries: 14 (0.003s) Memory: 0.7921 MB (Peak: 0.9500 MB) Zlib enabled. Server Time: 2017-10-21 04:42:38 UTC