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Technical Reference (continued)
Comparing North American and International Enclosure Classifications
NEMA Standard 250 is a product standard that addresses construction and performance elements of the enclosure itself, along with its ability to protect persons from contacting hazardous
components inside and against solid object and water ingress. IEC 60529 is NOT a product standard, and only covers the enclosures ability to protect persons from contacting hazardous
components inside the enclosure, as well as from solid object and water ingress. As a result, there is not a direct correlation between the two classifications. Additionally, if the requirement
for an enclosure Type is specified, an enclosure with just an IP rating cannot be substituted. However, while NEMA Type ratings meet and exceed the test requirements of associated IEC
classifications, the table below shows the comparative relationship between the two ratings (as outlined in the NEMA whitepaper: A Brief Comparison of NEMA 250 and IEC 60529).
NEMA Enclosure
Type Number
IEC Enclosure
“IP” Designation
1 20
2 22
3 55
3R 24
3S 55
4 and 4X 66
5 53
6 67
6P 68
12 and 12K 54
13 54
Note: This table cannot be used to convert
from IEC classifications to NEMA types
Testing Standards
In applications such as processing plants and industrial marinas, electrical devices are frequently exposed to high pressure water streams,
temporary immersion in water and corrosive environments (such as salt air). It is imperative that the electrical connectors are able to
withstand the rigors of such environments.
Leviton Wetguard devices are tested to and exceed IEC and UL watertight and weatherproof standards.
These independent tests have defined parameters as noted in the text that follows:
IEC IP Water Penetration Test:
Water is sprayed from a 12.5 millimeter (.5 inches)
diameter nozzle from a distance of 3 meters
(10 feet) at a rate of 100 liters (26 gallons) per minute
on a joined plug and connector. The water spray is directed
at the connector/plug joint and cable entries. Additionally, parts
are submerged in water 1 meter (3 feet) deep for 30 minutes.
Result: Wetguard Plugs and Connectors are rated to IP67 when connected.
UL NEMA Water Penetration Test:
Water is sprayed from a 25 millimeter (1 inch) diameter
nozzle from a distance of 3.5 meters (12 feet) at a
rate of 240 liters (65 gallons) per minute on a joined
plug and connector. The water spray is directed
at the connector/plug joint and cable entries.
Additionally, parts are submerged in water 1.8 meters
(6 feet) deep for 24 hours and subjected to a salt spray (fog) for 200 hours.
Result: Wetguard Plugs and Connectors are rated to NEMA 4, 4X, 6, and 6P when connected.
Leviton Manufacturing Co., Inc.
201 N Service Rd, Melville, NY 11747
Telephone: [phone] • Fax: [phone] • Tech Line (8:30AM-7:00PM E.S.T. Monday-Friday): 1-800-824-3005
Visit our Website at: www.leviton.com/wetguard • email: [e-mail]
© 2016 Leviton Manufacturing Co., Inc. All rights reserved. Santoprene is a registered trademark of Exxon Mobil.
Valox is a registered trademarks of SABIC Innovative Plastics. Wetguard is a registered trademark of Leviton Manufacturing.
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