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#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.

2017 / 2014 NEC & Related Books and Study Guides
#92612 03/29/05 12:16 PM
Joined: Jul 2004
Posts: 9,668
Likes: 6
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

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