22-200 does not say NMWU can be installed in a raceway it says it may be installed in a category 1 (wet) location.
Table 19 does not list Loomex of any designation for installation in a raceway so in a raceway it may not be installed.
The heat thing is at best a reach for an answer to prevent the installation of loomex.
Can anyone explain why they want to install it in a raceway? I cannot understand installing a pipe then sticking a cable in it. Expense without benefit?
Did you notice the quotation marks in my post? They're there because I was quoting directly out of the bulletins issued by the ESA in Ontario.
I didn't write the bulletins, the ESA in Ontario did, so it is allowed in Ontario, if no where else.
Plus table 19 does show NMWU for direct earth buriel with protection. I always thought that conduit was protection.
As for why you'd do it... in addition to some of the other responses, sometimes it's actually cheaper.
Bruce
