On Sun, 1 May 2005 11:32:45 -0400, "Ron" wrote:

The 1/4" air gap for damp installations comes from Article 312.2(A). This
article applies to cabinets, cutout boxes (disconnects), meter socket
enclosures. The article is also refer to by other sections such as
overcurrent protective devices, panelboards, etc.
There is no similar requirement for boxes (junction or device) or raceway
(conduit) to follow 312.2(A). The equipment must be placed or equipped to
prevent moisture from entering or accumulating within the box or fitting.
See 314.15(A) in the 2002 NEC at the library.


Ah good stuff. I was confused where 'device boxes' were in this
requriment, and you cleared it up, it isn't.


Just my 2 cents:
As for basements, only 'some basements' need to be treated as damp
locations (ART 100), not all have to be treated as damp locations.

thx,

tom @ www.WorkAtHomePlans.com








"William Deans" wrote in message
news:1114904211.2f18791c8024dea92296a217f938eb09@ teranews...
Greetings,

The NEC states that you cannot put metalic boxes onto masonry which may be
damp without a 1/4" airspace. Does this mean that you cannot use metal
boxes / emt on masonry basement walls? What about metal boxes / emt on
masonry basement walls of a row home between the homes?

Thank you for your time and energy,
William