Hammond Paint Finish
NEMA Type 12
Hammond Type 12 industrial enclosures are finished with recoatable powder coating.
NEMA Type 4
Hammond Type 4 industrial enclosures are finished with recoatable powder coating.
NEMA Type 4X for Painted Mild Steel Enclosures
Users of previous Hammond Manufacturing catalogs may have noticed a change to the ratings noted for Type 4 painted mild steel enclosures. Previously, Hammond catalog’s have shown that these enclosures also carried the Type 4X designation, but this is no longer the case. There has been NO CHANGE WHATSOEVER to the quality of the Hammond paint finish. Hammond has removed the 4X approval from this catalog only to avoid misapplication of painted steel enclosures. The testing criteria for Type 4X is not as rigorous as many users may assume.
It is important for users to understand the NEMA 4/4X rating. In response to concern about the costs of corrosion, the Underwriters’ Laboratory (UL) and the National Electrical Manufacturers’ Association (NEMA) have developed a rating system for electrical enclosures, stipulating that certain minimum conditions of corrosion resistance be met.
Material tested to UL1332 (type 4 protective coating) is prerequisite to a type 4X salt spray test. The NEMA 4X rating is applied to material that has met, under laboratory conditions, a two hundred hour salt spray with no worse pitting than that exhibited on a Type 304 Stainless sample run at the same time. This rating, however, does not test for corrosion resistance beyond this, or with chemicals other than salt. |
