Electrical safety sizing a gutter for the proper fit is relatively easy.
Auxiliary gutters definition.
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Metal and nonmetallic wireways are still considered to be raceways based on a change that occurred to the definition of raceways in article 100 in the 2014 nec and to the defined terms in 376 2 for metal wireways and 378 2 for nonmetallic wireways.
Section 620 35 which does address auxiliary gutters used in elevator installations notes they shall not be subject to the restrictions of 366 12 2 covering their length or 366 22 covering the number of conductors.
I get a lot of calls to make sure that the gutter that they are using is up to code.
A wireway by definition is installed as a separate system from the panel cabinet or other enclosure.
My interpretation of an auxiliary gutter is a gutter made for and attached to the sides of an enclosure and they are always installed as a system with the cabinet.
Auxiliary gutters are not considered to be a raceway.
Articles 376 and 378 focus on wireways not auxiliary gutters.
How to use auxiliary in a sentence.
However 310 10 h still applies.
The term gutter is used in this non raceway location in the nec.
Articles 386 and 388 cover surface raceways not auxiliary gutters.