Friday, June 5, 2015

PowerHour Tech Minute Summary of NEMA 250-2003 Enclosure Types For Non-Hazardous Environments

This PowerHour Tech Minute is supplied by Stahlin Non-Metallic Enclosures. PowerHour–Performance Matters! Is a dynamic, educational presentation by electrical enclosure experts in the office workplace or job site.


This month’s PowerHourTech Minute covers definitions from NEMA’s 250-2003 in non-hazardous locations. Listed below, are specific enclosure types, their applications, and the environmental conditions they protect against when they are completely and properly installed.

Type 1: Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts and to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt).

Type 2: Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); and
to provide a degree of protection with respect to harmful effects on the equipment due
to the ingress of water (dripping and light splashing).

Type 3: Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and that will be undamaged by the external formation of ice on the enclosure.

Type 4: Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects(falling dirt and windblown dust); to provide a degree of protection with respect to
harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external formation of ice on the enclosure.

Type 4X: Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects
(windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); that provides an additional level of protection against corrosion; and that will be undamaged by the external formation of ice on the enclosure.

Type 5: Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and settling airborne dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

Type 6: Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (hose directed water and the entry of water during occasional temporary submersion at a limited depth); and that will be undamaged by the external formation of ice on the enclosure.

Type 6P: Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects
(falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (hose directed water and the entry of water during prolonged submersion at a limited depth); that provides an additional level of protection against corrosion and that will be undamaged by the external formation of ice on the enclosure.

Type 12: Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a
degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

Type 13: Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing); and to provide a degree of protection against the spraying, splashing, and see page of oil and non-corrosive coolants.


Stahlin Non-Metallic Enclosures’ PowerHour  - Performance Matters! - is a dynamic, educational presentation that is presented by electrical enclosure experts in the office-place or on-the-job site. Presentations are given at any time of the workday that is convenient for participants. This interactive, versatile, energetic program focuses on how to make proper product specification decisions when comparing composite versus metallic electrical enclosures for NEMA 4X environments. 

Stahlin’s PowerHour captures audience attention and enhances learning retention. As a result of its instructional quality, graduates of the PowerHour can earn 1 PdH continuing education credit.

The PowerHour is aimed directly at informing owners, engineers, end-users and product specifiers about:
o   The history of electrical enclosures
o   Understanding NEMA and NEMA 4X Environments
o   How different materials perform in NEMA 4X Environments
o   Why material selection is important
o   Failures/Successes based on material selection
o   Comparing composite FRP enclosures to stainless steel enclosures
o   Understanding the importance of performance properties
§  Corrosion resistance
§  Chemical Resistance
§  UV Resistance
§  Strength
§  Thermal/Electrical Properties
o   Understanding the importance of modification capabilities
o   Knowing the difference between cost and value
The decision making process will be highlighted by “real life” case studies demonstrating why “performance matters” when specifying enclosures to meet specific on-the-job needs.

To learn more, or to schedule a PowerHour please contact:
Megan Cox
PowerHour Director
mcox@stahlin.com

616.794.0700

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