Does wireway need to be UL (or otherwise) listed? The NEC only mentions the need for a manufacturer's label to be visible.
The company I work for has wireway routinely made by a local metal working shop. These wireways have been used on numerous jobs and in various cities and municipalities. Apparently no inspectors or engineers have ever had an issue with this unlisted and unlabeled wiring system. The "homemade" wireways are custom shaped for each installation so it is BLATENLY obvious that they are not something that got spit out of a factory by the thousands. There is no way that countless "authorities having jurisdiction" could have missed this. The units are very well constructed but don't they need to be UL listed?
So what are the rules governing wireways?
