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I'm hearing conflicting information on how to solve problems on the number
of CCCs allowed in a wireway. I've heard that it is an "approved method" to
insert a divider in the wireway while still maintaining <30 CCCs and <20%
fill for the subdivided section to be within Code compliance.

Is there documentation somewhere that this is an "approved method"? Some are saying
that this is not an approved method. Which is it? It makes sense to me that a divider essentially makes two smaller wireways, so the code limitations apply equally to both sections of the subdivided wireway.

Is there an official NFPA interpretation? At least a couple city inspectors are approving this method.


Joe Tedesco, NEC Consultant