Can you have primary and secondary conductors in the same gutter?
Assuming you are asking about service conductors, then yes, the primary and secondary conductors can be installed in the same gutter space since the gutter is not a raceway as defined by Article 100. Section 230.7 prohibits installation of primary and secondary cables within a raceway. An auxiliary gutter would also be approved since it is also not a raceway.
Provided all conductors have a minimum insulation rating of at least the maximum circuit voltage applied to any conductor in the gutter, then yes.
And to expand on my last post, that is only applicable to 600V systems or less. Otherwise, conductors rated over 600V cannot occupy the same raceway, gutter, etc. as those below 600V.
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