ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Chinese motors rated 220 v 50 hertz
by gfretwell - 07/23/24 10:29 AM
100 Definitions: Accessible 2023
by gfretwell - 07/23/24 10:12 AM
100 Definitions, Likely to Become Energized, 2023
by gfretwell - 07/23/24 10:08 AM
240V only in a home and NEC?
by emolatur - 07/18/24 01:05 PM
2023 CEU Course
by gfretwell - 07/17/24 01:08 AM
Recent Gallery Topics:
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
2 members (Scott35, HotLine1), 725 guests, and 47 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#92611 03/29/05 06:19 AM
Joined: Jul 2002
Posts: 103
J
jes Offline OP
Member
Painting (enameling) of boxes is apparantly still permitted as a method of protection from corrosion. Larger junction and pull boxes still are. At one time most (all?) outlet, switch and junction boxes were painted, usually black. Does anyone know when/why the migration occurred to galvanized metal or other protection means? Thanks.

Horizontal Ad
#92612 03/29/05 12:16 PM
Joined: Jul 2004
Posts: 9,958
Likes: 34
G
Member
From what I have seen I would say post WWII would be a place to start looking for galvanized. I inspected one of the WWII training bases in Florida that is still being used and renovated in the 90s. I saw a mix of painted and galvanized boxes there. On the other hand all of the original wiring in the CaDZan mansion in Sarasota (circa late 20s, early 30s) was painted boxes.
My guess is the building boom after WWII was when galvanized boxes really took over.

As an interesting side bar, when I tested the old BX as a ground path in those "temporary" WWII buildings with my Ecos tester they virtually all read <1 ohm under load. I guess those boys did good work.


Greg Fretwell

Link Copied to Clipboard
Featured:


* * * * * * *
Tools for Electricians
Tools for Electricians

 
* * * * * * *

2023 National Electrical Code (NEC)
2023 NEC + Exam Prep Study Guides Now Available!

Member Spotlight
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
Top Posters(30 Days)
Popular Topics(Views)
323,531 Are you busy
247,853 Re: Forum
231,635 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5