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            1. NEMA
            2. Standards
            3. Enclosures for Electrical Equipment (1,000 Volts Maximum)
            Standards Publication

            Enclosures for Electrical Equipment (1,000 Volts Maximum)

            ANSI/NEMA EN 10250-2024 | Status: Active | ID: 101053

            This standard covers enclosures for electrical equipment rated not more than 1000 V and intended to be
            installed and used as follows:
            a. enclosures for indoor locations, Types 1, 2, 5, 12, 12K, and 13;
            b. enclosures for indoor or outdoor locations, Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6,
            and 6P; and
            c. enclosures for hazardous (classified) locations, Types 7 and 9
            This standard covers the requirements to provide protection to the enclosed equipment against specific
            environmental conditions. The requirements of this standard mandate that enclosures and equipment
            shall be installed and used in accordance with the manufacturer’s instructions and 110.3(B) of
            ANSI/NFPA 70, National Electrical Code® (NEC®).
            This standard covers the requirements for enclosures that are installed and ready for use in
            nonhazardous (unclassified) locations.
            This standard also covers the requirements for dust-tight enclosures that are installed and ready for use
            where permitted by NEC® in Class II, Division 2; Class III, Division 1; Class III, Division 2; and Zone 22
            hazardous (classified) locations as defined by the NEC®, or by ANSI/UL 121201, Nonincendive Electrical
            Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified)
            Locations (UL 121201). Where dust-tight enclosures are integral to or incorporate separable electrical
            connections (e.g., plug and receptacle, plug and connector body, inlet and connector body) for use in
            Class II, Division 2; Class III, Division 1; Class III, Division 2; and Zone 22 hazardous (classified)
            locations, the combination shall be designed to ensure that current cannot be ruptured at the separable
            electrical connections while energized parts are exposed.
            This standard also references requirements for Class I; Division 1 explosion-proof enclosures marked
            Type 7 and Class II, Division 1 dust-ignition-proof enclosures marked Type 9. The reference requirements
            are in accordance with ANSI/UL 1203, ExplosionProof and Dust-IgnitionProof Electrical Equipment for
            Use in Hazardous (Classified) Locations (UL 1203), with the associated area classifications and
            installation requirements in accordance with NEC®.
            This standard supplements the requirements for enclosures that are contained in the individual product
            standards.
            This standard does not cover the requirements for the protection of the enclosed equipment against
            conditions such as condensation, gas vapor ignition, thermal damage, icing, corrosion, or contamination
            that may occur within the enclosure or that may enter via conduit or unsealed openings.
            This standard does not cover protection of personnel from contact with enclosed electrical equipment
            where the enclosures or equipment are incompletely installed or where enclosed electrical equipment has
            been rendered accessible for servicing, maintenance, testing, troubleshooting, internal measurements,
            calibration, or by damage.
            A product that contains features, characteristics, components, materials, or systems new or different from
            those in use when the standard was developed (and that involves a risk of fire, electric shock, or injury to
            persons) shall be evaluated using the appropriate additional component and end-product requirements as
            determined necessary to maintain the level of safety for the user of the product as originally anticipated
            by the intent of this standard.
            Buy

            Published Date: August 9, 2024

            Number of pages: 51

            Staff Contact: Daniel Abbate

            Download Standard

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            Keywords

            EN 10250-2024, ENCLOSURES FOR ELECTRICAL EQUIPMENT, ANSI/NEMA EN 10250-2024, NEMA 250

            Topics

            • Enclosures
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