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Bulletin Number:

  • A51S
  • Industry Standards:

    UL 50 Listed; Type 3R, 4, 4X, 12; File No. E27525 cUL Listed per CSA C22.2 No 94; Type 3R, 4, 4X, 12; File No. E27525 UL 508A, 508 Listed; Type 3R, 4, 4X, 12; File No. E61997 cUL Listed per CSA C22.2 No 94; Type 3R, 4, 4X, 12; File No. E61997 NEMA/EEMAC Type 3R, 4, 4X, 12, 13 CSA File No. 42184: Type 4, 4X, 12 IEC 60529, IP66 Meets Type 3RX requirements
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    Used in either corrosive or outdoor applications, Clamp Cover Enclosures combine a seamless foam-in-place gasket with stainless steel screw-down clamps for a consistent and reliable seal, yet the cover is easily removed for access and modifications.


  • 16 and 14 gauge Type 304 or 316L stainless steel
  • Seams continuously welded and ground smooth
  • Seamless foam-in-place gasket
  • Stainless steel screws and clamps
  • Weldnuts provided for mounting optional panels and terminal block kits in size 6.00 x 4.00 in. (152 x 102 mm) and larger
  • Bonding provision on door and body
  • Accessories:

  • Terminal Block Kit Assembly for Junction Boxes Overview
  • Fast-Operating Clamp-Cover Junction Box Clamp
  • Panels for Junction Boxes
  • Steel and Stainless Steel Window Kits
  • Modifications and Customizations:

    Hoffman excels at modifying and customizing products to your specifications. Contact your local Hoffman sales office or distributor for complete information.


  • A404NFSS, A404NFSS6, A6044NFSS and A6044NFSS6 are UL 508A Listed.
  • The remaining catalog numbers are UL 50 Listed.
  • Catalog numbers ending in "6" are Type 316L stainless steel.
  • Purchase panels separately. Optional stainless steel, composite and aluminum panels are also available for most sizes.
  • Reference the Specification Sheet for Popular Accessories.
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