ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
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
AFDD's coming to the UK
by Texas_Ranger - 01/17/23 07:22 PM
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 (), 9 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#221556 08/19/21 07:26 AM
Joined: Aug 2021
Posts: 1
J
New Member
Good morning,

I was hanging out over a friends house the other day and he had this panelboard in his garage. I was curious about it and he tells me they were doing a remodel at the Edsel Ford Mansion (son of Henry Ford automaker) in Grosse Pointe Michigan in the mid 90's and they demoed this panel. They were just going to throw it away so he kept it. This mansion was built in 1928 This panel could possibly date back to 1928.

The Ford Mansion has been a public museum since the late 70's. It has its own powerhouse on the grounds.

My question is with the bus arrangement.

Because of the writing on the labels I assume that my picture is orientated properly.

I assume the bus bar on the right would be considered "A" phase.

I assume the bus bar in the middle is "B" phase.

I assume the bus bar on the left would be considered "C" phase.

I'm used to seeing A,B,C,A,B,C,A,B,C,A,B,C all the way down the panel.

The phasing on this panelboard from top to bottom looks like A,B,C,C,B,A,A,B,C,C,B,A

Why would they have two A phases adjacent to each other in the panel?

Why would they have two C phases adjacent to each other in the panel?

I can't make out any of the labels on the fuses.

Thanks,

Attached Images
panel1.jpg panel-2.jpg panel-3.jpg
Last edited by Admin; 08/19/21 12:00 PM. Reason: Assisted with Attachments
jimmysue #221557 08/20/21 09:24 PM
Joined: Apr 2002
Posts: 7,333
Likes: 7
Member
Another of these interesting old panels; I think this is the second one here at ECN recently. Add in the one I found a few years ago.

Let's say the right buss is "A" phase, with "B" center, and "C" on left. That gives us two locations where "A" has two adjacent taps, and "C" has one. There are also three (3) tap lugs, A,B,C buss.

Do you have this panel? If not, do you know who has it? Is the backbox and neutral bar around?


John
jimmysue #221680 12/25/21 01:17 AM
Joined: Sep 2002
Posts: 931
Likes: 1
N
Member
Hopefully it's not tossed out laer, & the provenance is recorded for future reference.

jimmysue #221682 12/28/21 05:54 PM
Joined: Aug 2011
Posts: 37
Likes: 1
G
Member
I can only think the ABCCBAABCCBA arrangement makes for a smaller panel footprint, since the same-phase adjacent taps are short-spaced.


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
Scott35
Scott35
Anaheim, CA. USA
Posts: 2,722
Joined: October 2000
Top Posters(30 Days)
BigB 9
Popular Topics(Views)
302,513 Are you busy
231,888 Re: Forum
216,519 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5