Having a discussion the other day about running conductors together in metal enclosures such as switchboards or in this case large fuse cabinets. For ease of installation and aesthetics the installer of these conductors (not me) grouped them by phase and neutral as they entered the box on top and then terminated them to their appropriate terminals. Some discussion ensued about whether or not this violated 300.20(A) which requires some sort of grouping, however the term grouped together is undefined so is this a violation or isn't it?
300.20 Induced Currents in Ferrous Metal Enclosures or Ferrous Metal Raceways.
(A) Conductors Grouped Together. Where conductors carrying alternating current are installed in ferrous metal enclosures or ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding ferrous metal by induction. To accomplish this, all phase conductors and, where used, the grounded conductor and all equipment grounding conductors shall be grouped together.