NEMA and Ingress Protection (IP)?

Hi,

Pls dfine wt u mn by NEMA and IP 1st if u 1 a hlpful rply

Ur wlcme

Lord Vader.

I think you should do some research on the net. Learn the definition of NEMA and IP and then come back if you have questions.

These questions have been asked and answered numerous times before on CR4.

Also Wikipedia has the answers too.

NEMA Definitions Pertaining to Non-Hazardous Locations:

Type Description

1 Intended for use primarily to provide a degree of protection against limited amounts of falling dirt.

3 Intended for outdoor use primarily to provide a degree of protection against rain, sleet,

windblown dust, and damage from external ice formation.

3R Intended for outdoor use primarily to provide a degree of protection against rain, sleet, and

damage from external ice formation.

3S Intended for 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.

4 Intended for 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.

4X Intended for 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

ice formation

6 Intended for indoor or outdoor use primarily to provide a degree of protection against hosedirected

water, the entry of water during occasional temporary submersion at a limited depth,

and damage from external ice formation.

6P Intended for indoor or outdoor use primarily to provide a degree of protection against hosedirected

water, the entry of water during prolonged submersion at a limited depth, and

damage from external ice formation.

12 Intended for indoor use primarily to provide a degree of protection against circulating dust,

falling dirt, and dripping non-corrosive liquids.

12K Type 12 with knockouts.

NEMA Definitions Pertaining to Hazardous Locations:

Type Description

7 Intended for indoor use in locations classified as Class I, Groups A, B, C, or D, as defined in

the National Electrical Code.

8 Intended for indoor or outdoor use in locations classified as Class I, Groups A, B, C, or D, as

defined in the National Electrical Code.

9 Intended for indoor use in locations classified as Class II, Groups E, F, or G, as defined in the

National Electrical Code.

10 Constructed to meet the applicable requirements of the Mine Safety and Health

Administration.

Atul

The IEC, standard 60529, has defined Ingress Protection as a two digit code. The first digit describes the degree of protection against access to hazardous parts and ingress of solid objects. The second digit designates the Ingress Protection against water. Please refer to the appropriate sections of IEC 60529 for complete information regarding applications, features, and design tests. Therefore an IP 65 rating means that the unit is: Protected against access with a wire (1.0 mm), is Dust tight and can handle Jetting water - any direction.

Protection Against Access to Hazardous Parts (First Digit)

Number Description

0 Non-protected

1 Protected against access with back of hand (50 mm)

2 Protected against access with jointed finger (12 mm x 80 mm)

3 Protected against access with a tool (2.5 mm)

4, 5, 6 Protected against access with a wire (1.0 mm)

Protection Against Ingress of Solid Foreign Objects (First Digit)

Number Description

0 Non-protected

1 Objects equal or greater than 50mm

2 Objects equal or greater than 12.5mm

3 Objects equal or greater than 2.5mm

4 Objects equal or greater than 1mm

5 Dust protected

6 Dust tight

Protection Against Ingress of Liquids (Second Digit)

Number Description

0 Non-protected

1 Water dripping vertically

2 Water dripping, enclosure tilted up to 15°

3 Spraying water, up to 60° angle from vertical

4 Splashing water, any direction

5 Jetting water, any direction

6 Powerful jetting water, any direction

7 Temporary immersion in water

8 Continuous immersion in water

The following table provides a guide for converting from NEMA Enclosure Type Numbers to IEC Enclosure Classification Designations.

NEMA Enclosure Type Number / IEC Enclosure Designation

1 / IP10

2 / IP11

3 / IP54

3R / IP14

3S / IP54

4 and 4X / IP56

5 / IP52

6 and 6P / IP67

12 and 12K / IP52

13 / IP54

I'd like to be sure I understand clearly what is said in those NEMA / Ingress Protection tables: NEMA and Ingress Protection have some overlap. Where this overlap exists, they are interchangeable (and in all likelihood, it then falls to plant / client / end user / etc. preference as to which is used). Where they are unique, obviously, the one that suits the condition at hand should be used.

Correct?