- NEMA 1 Standard:

NEMA 1 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 1 enclosures are intended for indoor use and provide a degree of protection against the ingress of solid foreign objects (such as tools and wires) and protection against a limited amount of dust, falling dirt, and dripping non-corrosive liquids.

- NEMA 2 Standard:

NEMA 2 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 2 enclosures are intended for indoor use and provide a higher degree of protection against the ingress of solid foreign objects (such as tools and wires) and protection against a limited amount of dust, falling dirt, and dripping non-corrosive liquids when compared to NEMA 1. Additionally, it offers protection against the ingress of light splashing of liquids.

- NEMA 3 Standard:

NEMA 3 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 3 enclosures are intended for outdoor use and provide a degree of protection against the ingress of solid foreign objects (such as tools and wires), protection against a limited amount of dust, falling dirt, and protection against the ingress of rain and sleet. It has more robust and weatherproof construction, typically outdoor type electrical equipment use it.

- NEMA 5 Standard:

NEMA 5 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 5 enclosures are intended for indoor use and provide a degree of protection against the ingress of solid foreign objects (such as tools and wires), protection against a limited amount of dust, and protection against accidental contact with live parts. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are not intended to be frequently accessed by operators and maintenance personnel. It is also common for residential use, and that provides protection against limited ingress of liquids such as falling drops and splashing water.

- NEMA 6 Standard:

NEMA 6 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 6 enclosures are intended for indoor and outdoor use and provide a high degree of protection against the ingress of solid foreign objects (such as tools and wires), protection against a limited amount of dust, protection against the ingress of rain and sleet, and protection against the ingress of hose-directed water. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in wet or damp locations, such as in outdoor or marine environments. NEMA 6 enclosures are designed to be watertight and provide a higher level of protection against water ingress when compared to NEMA 3 and other NEMA types.

- NEMA 7 Standard:

NEMA 7 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 7 enclosures are intended for indoor use and provide a high degree of protection against the ingress of dust and protection against the presence of flammable gases, vapors, and liquids. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in hazardous locations where flammable gases, vapors, or liquids may be present. NEMA 7 enclosures are also known as explosion-proof enclosures, designed to contain an explosion within the enclosure and prevent it from igniting surrounding flammable materials. These enclosures are used in a wide range of applications such as oil and gas refineries, chemical plants, and mining operations.

- NEMA 8 Standard:

NEMA 8 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 8 enclosures are intended for indoor use and provide a high degree of protection against the ingress of dust and protection against the presence of flammable gases, vapors, and liquids, and also provide a degree of protection against accidental contact with live parts. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in hazardous locations where flammable gases, vapors, or liquids may be present, and also providing protection to personnel from accidental contact with live parts. NEMA 8 is similar to NEMA 7, but also provides protection against live parts. It is used in similar application as NEMA 7, in environments where there's a risk of personnel coming in contact with live parts and presence of flammable gases, vapors, or liquids.

- NEMA 9 Standard:

NEMA 9 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 9 enclosures are intended for indoor use and provide a high degree of protection against the ingress of dust and protection against the presence of flammable gases, vapors, and liquids, and also provide a high degree of protection against accidental contact with live parts, and protection against mechanical damage. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in hazardous locations where flammable gases, vapors, or liquids may be present, also providing protection to personnel from accidental contact with live parts and providing protection for the equipment against mechanical damage. NEMA 9 is similar to NEMA 8, but also provides protection against mechanical damage, which means it's designed to withstand impact, vibration, and other forms of mechanical abuse. It's used in similar application as NEMA 8, in environments where there's a risk of personnel coming in contact with live parts and presence of flammable gases, vapors or liquids.

- NEMA 12 Standard:

NEMA 12 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 12 enclosures are intended for indoor use and provide a degree of protection against the ingress of solid foreign objects (such as tools and wires) and protection against a limited amount of dust, falling dirt, and dripping non-corrosive liquids, and also provide protection against oil seepage and coolant leakage. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in environments where oil seepage or coolant leakage may occur, and also provides protection against dust and other solid foreign objects, as well as dripping non-corrosive liquids. It is a common type of enclosure used in the manufacturing and industrial environment, where the equipment may be exposed to oil or coolant leakage, but not to the degree of protection required by NEMA 4.

- NEMA 13 Standard:

NEMA 13 is a standard established by the National Electrical Manufacturers Association (NEMA) that pertains to the construction and testing of enclosures for electrical equipment. NEMA 13 enclosures are intended for indoor use and provide a high degree of protection against the ingress of solid foreign objects (such as tools and wires) and protection against a limited amount of dust, falling dirt, and dripping non-corrosive liquids, and also provide protection against oil seepage, coolant leakage, and the presence of mild chemical fumes or solvents. This standard applies to enclosures for use with electrical equipment, such as control panels and industrial systems that are intended to be used in environments where oil seepage, coolant leakage, or the presence of mild chemical fumes or solvents may occur, and also provides protection against dust and other solid foreign objects, as well as dripping non-corrosive liquids. Similar to NEMA 12 it is commonly used in manufacturing and industrial environments where equipment may be exposed to oil, coolant leakage, or mild chemical fumes or solvents, but with a higher level of protection than the NEMA 12. It is not as common as other NEMA standards.