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Corrosion Problems #102907
11/26/01 08:43 AM
11/26/01 08:43 AM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
[Linked Image]

Many parking garages are considered as damp locations. This box shows signs of corrosion and should never have been used here. See 300.6 Protection Against Corrosion.


Joe Tedesco, NEC Consultant
2017 / 2014 NEC & Related Books and Study Guides
Re: Corrosion Problems #102908
11/26/01 09:30 AM
11/26/01 09:30 AM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
What about the set screw connector?

Re: Corrosion Problems #102909
11/26/01 10:46 AM
11/26/01 10:46 AM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
For EMT See Section, 348-4. Uses Permitted

(a) Exposed and Concealed. The use of listed electrical metallic tubing shall be permitted for both exposed and concealed work.

(b) Corrosion Protection. Ferrous or nonferrous electrical metallic tubing, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by corrosion protection and judged suitable for the condition.

FPN: See Section 300-6 for information on protection against corrosion.

PS: This installation was about 300 yards from the ocean.


Joe Tedesco, NEC Consultant
Re: Corrosion Problems #102910
11/29/01 06:21 PM
11/29/01 06:21 PM
A
alan bergold  Offline
Member
Joined: Nov 2001
Posts: 42
east meadow ny
THIS is something often seen by the ocean,
i see it all the time , the salt in the air ,fog and land tend to do this if this was a pvc installation this wouldnt happen.
There should be a restriction on installations near saltwater...


JBIELECTRIC EAST MEADOW NY
Re: Corrosion Problems #102911
11/29/01 06:44 PM
11/29/01 06:44 PM
P
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Yep, this sort of corrosion is a problem where I live as well. My back yard goes straight on to sand dunes and the beach, about 40 yd. max. The winter weather by England's North Sea coast brings spray and the salty atmosphere into everything.

Re: Corrosion Problems #102912
12/30/01 11:48 AM
12/30/01 11:48 AM
S
sudsy52  Offline
Junior Member
Joined: Dec 2001
Posts: 7
canada
I see boxes like this all the time in our local salt mine
boxes last about two months if lucky


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