Accessory List
Enclosure Selection Chart
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Enclosure ratings in NEMA and IP terms are similar. Use the following tables to convert from one rating to the other.
NEMA Rating Definitions (Ref. NEMA 250, UL 50, and ANS/UL 50).
IP Rating Definitions (Ref. IEC 60529 and ANSI/IEC 60529).
Example IP Rating.
Enclosure Type Rating VS IP Rating Cross Reference (Approximate only).
IP ratings do not directly convert to NEMA types
IEC 60529 has no equivalents to NEMA enclosure Types 7, 8, 9, 10, or 11.
Type ratings and IP ratings have the following in common:
- A degree of protection for persons from hazardous components inside the enclosure.
- A degree of protection for equipment inside the enclosure from ingress of solid foreign objects, including dust.
- A degree of protection for equipment inside the enclosure from ingress of water.
NEMA 250 and UL50 type rating documentation defines additional requirements that type-rated enclosures must meet. These include the following:
- Mechanical impact on enclosure walls.
- Gasket aging and oil resistance
- Corrosion resistance
- Door and cover requirements
- Sheet metal gauge construction requirements
NOTE: Electrical enclosures that carry only an IP rating have not been designed to the NEMA rating requirements and therefore cannot be assigned a
NEMA rating.
NEMA Type Intended Use and Description UL Standard UL50 Requirements
1
Indoor use primarily to provide a degree of protection against
limited amounts of falling dirt.
Corrosion Protection—5.3 or Rust Resistance—Section 38
2
Indoor use primarily to provide a degree of protection against
limited amounts of falling water and dirt.
Corrosion Protection—5.3 or Rust Resistance—Section 38, Drip—
Section 31, Gaskets—Section 14 and Gasket Tests—Section 43.
3
Outdoor use primarily to provide a degree of protection against
rain, sleet, windblown dust and damage from external ice
formation.
Rain—Section 30, Outdoor dust or Hose—Section 32 or 35,
Icing—Section 34, Protective Coating—Section 15, Gaskets—
Section 14, and Gasket Tests—Section 43.
3R
Outdoor use primarily to provide a degree of protection against
rain, sleet, and damage from external ice formation.
Rain—Section 30, Icing—Section 34, Protective Coating—Section
15, Gaskets—Section 14 and Gasket Tests—Section 43.
3S
Outdoor use primarily to provide a degree of protection against
rain, sleet, windblown dust and to provide for operation of external
mechanisms when ice laden.
Rain—Section 30, Outdoor Dust or Hose—Section 32 or 35,
Icing—Section 34, Protective Coating—Section 15, Gaskets—
Section 14 and Gasket Tests—Section 43.
4
Indoor or outdoor use primarily to provide a degree of protection
against windblown dust and rain, splashing water, hose-directed
water and damage from external ice formation.
Hosedown—Section 35, Protective Coating—Section 15,
Corrosion Resistance—Section 39, Icing—Section 34, Gaskets—
Section 14 and Gasket Tests—Section 43.
4X
Indoor or outdoor use primarily to provide a degree of protection
against corrosion, windblown dust and rain, splashing water, hose-
directed water, and damage from external ice formation.
Hosedown—Section 35, Protective Coating—Section 15,
Corrosion Resistance—Section 39, Icing—Section 34, Gaskets—
Section 14 and Gasket Tests—Section 43.
1st IP Number 2nd IP Number
IP Protection IP Protection
0 No protection 0 No protection
1
Protection against solid objects over 50 mm (i.e. accidental
touch by hands).
1
Protection against vertically falling drops of water (i.e.
condensation).
2 Protection against solid objects over 12 mm (i.e. fingers). 2 Protection against direct sprays of water up to 15° from vertical.
3
Protection against solid objects over 2.5 mm (i.e. tools and
wires).
3 Protection against sprays up to 60° from vertical.
4 Protection against solid objects over 1 mm. 4
Protection against water sprayed from all directions (limited
ingress permitted).
5 Protection against dust (limited ingress, no harmful deposit). 5
Protection against low pressure jets of water from all directions
(limited ingress permitted).
6 Total protection against dust. 6 Protection against strong jets of water.
7
Protection against the effects of immersion between 15 cm and
1 m.
8 Protection against long periods of immersion under pressure.
If 1st IP Number is: And the 2nd IP Number is: Then the IP Rating is:
23 IP23
Provides protection against
solid objects.
Provides protection against
fluids.
Then this rating provides enclosure protection against penetration of solid
objects greater than 12 mm and against water.
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