Re: EMT Fittings
1. Stainless steel is used in high corrosive areas that a die cast would not hold up to. IE: acid baths salt storage. But cost allot more and wouldn't be cost effective to use on every job.
2. Two piece compression fittings allow us to install a piece of EMT between two boxes with out removing one. the other reason is the old school required them for concrete. even though a set screw fitting is listed for concrete.
But again the compression fitting will cost more.
So if you want to drive up the cost of a job just use SS compression fittings.
:roll:
Oh I forgot the last part of your question:
Are there any reasons that you have to use stainless steel fittings or compression type fittings?
As far as SS fittings yes 300.6 requires them and the FPN give's you an idea what kind of enviroments they will be required in.
Eddited to add the last question
[ August 23, 2004, 08:03 PM: Message edited by: hurk27 ]