Stahlin Non-Metallic Enclosures Product Catalog SE-300

GENERALINFORMATIONGeneral InformationGeneralInformationInformation for Comparison of IEC andCSA/NEMA/UL/CUL RatingsNEMA 250 and UL 50 specify requirements and tests for thedegree of protection against entry as well as environmentalconditions such as falling dirt, ice, corrosion, oil and coolantswhereas IEC 529 does not have such requirements. Differentrating requirements make comparison difficult and disagreementsare common.The IEC designation consists of the letters IP followed by twonumerals. The first number indicates the degree of protectionprovided by the enclosure with respect to persons and solidforeign objects entering the enclosure. The second numberindicates the degree of protection provided by the enclosure withrespect to the harmful ingress of water.Caution is necessary when attempting to equateIEC and NEMA enclosure ratings because an exactequivalence is not possible.The data contained in the following table is provided forinformation and this table must only be used to apply NEMAratings to IEC designators; it should not be used inversely.The cross-reference is based on engineering judgment and isnot approved by the standards organizations.Specifications for Stahlin FiberglassEnclosure Back Panel ConstructionMaterialsFiberglassEnclosures are molded under heat and pressure with fiberglassreinforced polyester resin to produce superior chemical resistancein corrosive applications. The glass fiber reinforcement increasesenclosure strength to withstand physical loads such asunexpected impacts or additional tensile loads.Carbon SteelA low carbon, rolled steel produced by passing bar stock througha set of rolls.IPFirstCharacterIPOIP1IP2IP3IP4IP5IP6Assignment of IP Designations to NEMA Type Enclosure RatingsNEMA Enclosure Type1 2 3 3R 3S 4 4X 5 6 6P 12 12K 13A B A B A B A B A B A B A B A B A B A B A B A B A BIPSecondCharacter1PO IPO2P1 IP11P2 IP21P3 IP31P4 IP41P5 IP51P6 IP6IP7IP8A = A shaded block in the “A” column indicates that the NEMA Enclosure Type exceeds the requirements for the respective IEC 60529 IP First CharacterDesignation. The IP First Character Designation is the protection against access to hazardous parts and solid foreign objects.B = A shaded block in the “B” column indicates that the NEMA Enclosure Type exceeds the requirements for the respective IEC 60529 IP Second CharacterDesignation. The IP Second Character Designation is the protection against the ingress of water.7Stahlin Enclosures • 500 Maple Street, Belding, MI 48809 • Phone: 616-794-0700 • Fax: 616-794-3378 • www.stahlin.com