I would like an opinion. We have been in a discussion whether or not a warning ribbon is required when the service conductors are placed in a raceway underground. Section 300.5(D) talks about "direct buried conductors". The warning ribbon requirement was added to the code in the 2002 code cycle. I personal contacted the submitter of the proposal and ask him if his intent was to have the warning ribbon apply to conductor in raceway. He told me it was the intent to have the warning ribbon to apply to raceway systems also. He said the code panel did not add it to the code as he wanted. They put the requirement for the warning ribbon to apply to direct buried conductors. Searching the public inputs that was submitted to for the 2017 code cycle, the same submitter has a public input to have raceway added to the 30.5(D) section. The response of the code panel was that section 300.5(D) never was intended to apply to service conductors in a raceway. In my opinion, the way the code section reads now, that a warning ribbon is not required. Unless there is a public comment for the public input and accepted, a warning ribbon will not be required for conductors in raceway systems.
Herb
Herb