SX Kinetics, Inc. - Specialists in Solvent Extraction: Electrical Requirements

Definition of Electrical Classifications

Hazardous Locations:

Class I Locations: Hazardous locations because flammable vapours may be present in sufficient quantities to produce ignitable mixtures.

Class I, Division 1: Locations in which ignitable concentrations of flammable vapours can exist under normal operating conditions.

Class I, Division 2: Locations in which flammable liquids are used, but are normally confined within closed systems from which they can escape only in the event of accidental breakdown.

Class II Locations: Hazardous locations caused by combustible dust.

Class III Locations: Hazardous locations caused by ignitable fibres.

Electrical Enclosures:

NEMA 1: General Purpose: Enclosures for indoor use to provide protection from incidental contact and protection against falling dirt.

NEMA 2: Drip Tight: Enclosures for indoor use to provide protection from falling water and dirt.

NEMA 3: Water Resistant: Enclosures for outdoor use to provide protection from wind blown dust and rain. Undamaged by ice formation on the enclosure.

NEMA 3R: Rain Tight: Enclosures for outdoor use to provide protection from wind blown rain. Undamaged by ice formation on the enclosure.

NEMA 4: Water Tight: Enclosures for outdoor use to provide protection from wind blown dust and rain, splashing water, and hose directed water. Undamaged by ice formation on the enclosure.

NEMA 4X: Corrosion Resistant: Enclosures for outdoor use to provide protection from corrosion, wind blown dust and rain, splashing water, and hose directed water. Undamaged by ice formation on the enclosure.

NEMA 5: Dust Tight: Enclosures for indoor use to provide protection from falling dust.

NEMA 6: Submersible: Enclosures for outdoor use to provide protection against submersion in water.

NEMA 7: Hazardous Locations: Enclosures for class I hazardous locations (presence of flammable vapours). Circuit interruption occurs in air.

NEMA 8: Hazardous Locations: Enclosures for class II, oil immersed, groups A, B, C, and D hazardous locations (explosive atmosphere). Circuit interruption occurs in oil.

NEMA 9: Hazardous Locations: Enclosures for class II, groups E, F, and G hazardous locations (presence of combustible dusts).

NEMA 10: Mines: Enclosures for hazardous locations (such as coal mines).

NEMA 11: Acid Mists: Enclosures for use in corrosive atmospheres.

Electrical Requirements for Solvent Extraction Plants:

SX Plants with Combustible Liquids: Electrical wiring and components in solvent extraction plants with combustible liquids (class II or class IIIA combustible liquids) should be suitable for general purpose locations with NEMA 4 or NEMA 4X enclosures.

SX Plants with Flammable Liquids: Electrical wiring and components in solvent extraction plants with flammable liquids (1A, 1B, or 1C flammable liquids) should be suitable for class I, division 2 hazardous locations with NEMA 7 enclosures.

For more details regarding classes of combustible and flammable liquids: Combustible / Flammable Liquids

	Electrical Requirements: SX Plants