N-TB Stainless Steel or Sheet Steel Enclosures
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N-TB Stainless Steel or Sheet Steel Enclosures

Crouse-Hinds series N-TB is our premium line of stainless steel enclosures.  Available in 316L stainless steel and painted mild steel, N-TB enclosures have been designed to accommodate rail mounted terminals or other electrical components in corrosive and environmentally challenging outdoor applications.  

These enclosures are also available fully assembled as custom-configured and certified terminal boxes.  Options include custom entries, cable glands and plugs with built-in terminals (Ex-e and Ex-i) and other equipment.

Certification and compliance

Component certificates – BVS13ATEXE014U and IECEx BVS 13.0026U

  • 2G Ex e IIC Gb or 2D Ex tb IIIC Db
  • TR-CU and EAC certified
  • Class I, Division 2, Groups A, B, C, D*; Class I, Zone 1
  • cULus to UL50/C22.2 No. 94-M91
  • UL Listed E115376 (ordinary location)
  • Type 3S, 4 – painted mild steel; Type 4X/IP66 – stainless steel

* When terminal blocks or approved Class I, Division 2 devices are installed within the enclosure in accordance with NEC/CEC requirements. These enclosures are NOT explosion-proof and will NOT contain an explosion. Installation of arcing and sparking devices which are not Class I, Division 2 rated or higher is NOT PERMITTED.

Design features

  • Twenty-eight basic sizes in five standard depths to optimise the accommodation of rail mountable terminals or components
  • Fully removable hinged cover, concealed hinges provide 180° opening
  • Cover mounting, two or three stainless steel captive screws on one side
  • Lip on upstand increases gasket contact area, ensuring high degree of ingress protection
  • Internal/external ground stud
  • 40mm wide mounting lugs for assembly on standard frames
  • Option of 0, 1, 2, 3 or 4 gland plates
  • One-piece gasket on cover and gland plates
  • Optional through cover padlock hasp available

Factory customisation options

  • Terminals, glands and Myers hubs assembled according to customer specification
  • Drilled entries for cable glands fitted to customer specification
  • Tapped entries on 6mm thick gland plates

Standard materials

  • Enclosure – polished 316L stainless steel; polished 304 stainless steel; painted mild steel
  • Gasket – foam-in-place silicone (standard); cut silicone for extended temperatures (optional)
  • Cover screws – stainless steel