Leland:
The UL label is required in most jurisdictions.
The pipe trick is accepted in some, as long as the clamp is listed/labeled and suitable for the application. An al clamp would not fly.
edit to embelish saome details.....
As there was no 'listed-approved UL' device available, the metalic pipe with a pipe clamp was acceptable. Now, that there is a listed/approved item, that is the method.
Last edited by HotLine1; 06/16/10 03:30 PM. Reason: embelished details