Re: Coil Form needed 2

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Mddeming-at-aol-dot-com 

In a message dated 5/21/04 2:28:17 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes:
Original poster: Jim Lux <jimlux-at-earthlink-dot-net>

At 08:14 AM 5/21/2004 -0600, you wrote:
 >Original poster: Yurtle Turtle <yurtle_t-at-yahoo-dot-com>
 >Schedule 40 doesn't signify that it's pressure rated.
 >Schedule 40 PVC conduit is nonmetallic rigid
 >electrical conduit, and clearly isn't intended for
 >pressure applications. It's fine for secondary forms
 >though.

Actually... Schedule 40,80, etc. refers to water pipe, which is pressure
rated, but more particularly, it refers to the physical size, i.e. the wall
thickness.  The OD of the pipe is the same for Sch 40, 80, etc., so that it
fits into the same fittings.

There is also schedule 40 non-pressure rated drain pipe (see previous post)

Rigid Electrical Conduit follows water pipe OD sizes (that is, 1/2" rigid
conduit has the same dimensions and thread as 1/2" water pipe), but doesn't
necessarily have the same ID or wall thickness or most important,
bendability.  Rigid conduit is intended to be bendable and formable, while
water pipe is not (i.e. water pipe is originally black iron pipe,
notwithstanding that you see a lot of galvanized pipe around, particularly
in smaller sizes).


Black iron pipe is required for indoor gas lines. Galvanized is permitted 
for indoor water lines.


  Water pipe also often has a more obvious weld seam down
the inside, while electrical conduit usually does not.

Matt D.