INTRODUCTION
Purpose
• Understand electrical enclosure standards & ratings
Objectives
• Learn how to identify potential enclosure use environments
• Understand the different rating & certification systems
Learning Time
• 15 minutes
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HOFFMAN ®
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PROTECT FROM
THE ELEMENTS
Industrial automation equipment can be used in
almost any environment imaginable. Enclosures
must protect critical components from harmful
elements to extend their life and prevent
expensive operations downtime.
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HOFFMAN ®
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UNDERSTANDING ENCLOSURE ENVIRONMENTS
1. UNDERSTAND THE
ENVIRONMENT IN
WHICH ENCLOSURES ARE
TO BE USED
• Identify indoor or outdoor
• Identify potential
contaminants
2. SELECT THE RATING
BASED ON LOCATION
AND USE ENVIRONMENT
• Select the Type or IP
rating necessary to
provide the protection
required in the
environment
3. SELECT THE ENCLOSURE
AND MATERIAL WITH
THE PROPER RATINGS
• Select the best solution
platform that is ratings
compliant
Understand the use environment, select the right enclosure
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HOFFMAN ®
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INDUSTRIAL ENCLOSURE ENVIRONMENTS
WHAT TO ASK WHEN CLASSIFYING AN INDUSTRIAL ENCLOSURE ENVIRONMENT
INDOOR OR
OUTDOOR
DUST, DIRT OR
SOLIDS
WATER, OIL OR
LIQUIDS
FALLING OR
FORCED
Is the enclosure
intended to be located
indoors or outdoors?
Does the enclosure
need to protect against
dust, dirt or other solid
contaminants?
Does the enclosure
need to protect against
water, oil or other
liquids?
Is the solid or liquid
contaminant falling or
being forced into the
enclosure?
Understand environment to select the right enclosure
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HOFFMAN ®
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INDUSTRY STANDARDS ORGANIZATIONS
NEMA – NATIONAL
ELECTRICAL
MANUFACTURERS
ASSOCIATION
UL – UNDERWRITERS
LABORATORIES INC.
CSA – CANADIAN
STANDARDS
ASSOCIATION
IEC –
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
NEMA Standards
Publication 250 –
Enclosures for Electrical
Equipment
UL 50 – Enclosures for
Electrical Equipment
CSA Standard C22.2
IEC 60529 –
Classification of
Degrees of Protection
Provided by Enclosures
UL 508A – Industrial
Control Panels
Commonly recognized industry standards for protection ratings
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HOFFMAN ®
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INDUSTRY STANDARDS COMPARISON
NEMA - NATIONAL
ELECTRICAL
MANUFACTURERS
ASSOCIATION
UL – UNDERWRITERS
LABORATORIES INC.
CSA – CANADIAN
STANDARDS
ASSOCIATION
IEC –
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
•
Manufacturer
self-declared
•
Testing in certified
laboratory
•
Testing in certified
laboratory
•
•
Specifies
construction and
performance
requirements
•
Inspections to
ensure compliance
•
Inspections to
ensure compliance
•
Specifies
construction and
performance
requirements
•
Specifies
construction and
performance
requirements
Manufacturer
self-declared
Significant differences between industry standards
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HOFFMAN ®
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NEMA, UL, & CSA RATINGS
NORTH AMERICAN TYPE RATINGS SIMILAR ACROSS NEMA, UL AND CSA
TYPE
RATING
INDOOR/
OUTDOOR
TYPE 1
Indoor
•
•
Incidental personal contact
Dust and falling dirt
•
•
TYPE 12
Indoor
•
•
•
•
Indoor security and fire applications
Light industrial facilities
•
Incidental personal contact
Dust and falling dirt
Dripping non-corrosive liquid
PROTECTION FROM
TYPICAL APPLICATIONS
Climate controlled indoor shelters
Low contamination electrical rooms
• Offices and warehouses
TYPE 3R
Outdoor
•
•
Incidental personal contact
Rain, snow and sleet
•
•
Wireless telecommunications
Outdoor utilities
TYPE 4
Indoor/Outdoor
•
Incidental personal contact
Dust and falling dirt
Windblown dust and fibers
Hosedown / splashed water
•
Cement plants
Outdoor plants
Rubber tire manufacturing
Industrial plants
Incidental personal contact
Dust and falling dirt
Windblown dust and fibers
Hosedown / splashed water
Corrosive agents
•
•
•
•
•
TYPE 4X
Indoor/Outdoor
•
•
•
•
•
•
•
•
•
•
•
Marine applications
Wastewater treatment facilities
Food and beverage processing plants
Pharmaceuticals and cleanrooms
Petroleum and chemical processing
Identify enclosure type rating by evaluating use environment
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HOFFMAN ®
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IEC/IP RATING SYSTEM
INGRESS PROTECTION RATING
COMMONLY USED WORLDWIDE
OUTSIDE NORTH AMERICA
IP 6 6
Protection against
Liquids 0 - 8
Protection against
Solid Objects 0 - 6
IEC/IP ratings cannot be directly compared to NEMA/UL/CSA
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HOFFMAN ®
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IEC/IP RATING SYSTEM
IP
RATING
PROTECTION
FROM SOLIDS
PROTECTION
FROM LIQUIDS
IP20/IP30
• Objects 12mm/ 2mm
in diameter
•
IP54/IP55
IP66
IP69K
No protection
TYPICAL APPLICATIONS
•
Climate controlled indoor shelters
Low contamination electrical rooms
Offices and warehouses
•
•
• Dust (limited ingress)
•
•
Water spray
Low pressure jets
•
•
Indoor security and fire applications
Light industrial facilities
• Dust (no ingress)
•
Strong water jets
•
•
•
Petroleum and chemical processing
Wastewater treatment facilities
Pharmaceuticals and cleanrooms
•
Food and beverage processing
• Dust (no ingress)
•
•
High temperature
High pressure water jets
Identify enclosure IP rating by evaluating use environment
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HOFFMAN ®
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CHOOSING INDUSTRIAL ENCLOSURE MATERIALS
TYPE 1
TYPE 12
TYPE 3R
TYPE 4
TYPE 4X
MILD STEEL
MILD STEEL MODULAR
STAINLESS STEEL
ALUMINUM
NON-METALLIC
IP20/IP30
IP54/55
IP66
IP69K
Environmental ratings a primary factor in material selection
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HOFFMAN ®
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HOFFMAN TESTING & CERTIFICATION CAPABILITIES
COMPLETE IN-HOUSE, GLOBAL TESTING CAPABILITY ENSURES FULL COMPLIANCE
WITH ALL INDUSTRY STANDARDS
Hoffman has an onsite UL & CSA Certified Laboratory
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HOFFMAN ®
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SUMMARY
THINGS A DESIGN ENGINEER
NEEDS TO KNOW
1)
How to classify an industrial automation
enclosure use environment
2)
Different standards for industrial automation
enclosures
3)
NEMA or UL Type ratings and their meaning
4)
IP ratings and their meaning
5)
Where typical Type or IP ratings are used
6)
How to select an enclosure material to meet
the rating required
7)
Hoffman’s extensive testing and certification
capabilities
Understand the environment, select the right enclosure
PENTAIR
HOFFMAN ®
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