The term gutter is used in this non raceway location in the nec.
Auxiliary gutters definition.
Electrical safety sizing a gutter for the proper fit is relatively easy.
Articles 376 and 378 focus on wireways not auxiliary gutters.
Articles 386 and 388 cover surface raceways not auxiliary gutters.
This article covers the use installation and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings.
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.
Auxiliary gutters are not considered to be a raceway.
I get a lot of calls to make sure that the gutter that they are using is up to code.
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.
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.
However 310 10 h still applies.
How to use auxiliary in a sentence.
A wireway by definition is installed as a separate system from the panel cabinet or other enclosure.