Friday, February 25, 2011

Enclsoure Selection- How to---

The Enclosure Selection Sheet is designed to enhance
enclosure selection by making the process easier, more
consistent, accurate and complete. The goal is to assure
that factors affecting enclosure selection are considered and
the enclosure specification is complete and accurate.
Appropriate technical guidance is referenced to help with
the selection process and selectable items are shown in
bold type.

Most Important Factors Additional Factors to Consider
Internal Equipment Dimensions Service Connections
External Space Restrictions Mounting and Access
Climate Control Requirements
Future Expansion

These considerations establish:
Overall Height
Overall Width
Overall Depth
Inside Height
Inside Width
Inside Depth
Inside height, width, and depth are determined by the
internal equipment dimensions; the overall height, width and
depth are established by the external space restrictions and
may be influenced by additional factors such as mounting
access and climate control requirements. The Dimensions
are found in the drawings and tables for the respective

Area Classification: Hazardous or Non-Hazardous
Location Environment: Indoor; Outdoor; Degree of
Protection against Dirt, Dust,
Rain, Snow, Ice, Splashing
Water, Hose-Directed Water,
Corrosion, Submersion and Oil/Coolant.
Internal Equipment Electrical and/or Mechanical,Security
Ratings offered by Stahlin include Type 1, 3, 3R, 4, 4X, 6,
6P, 12, and 13. Information on area classifications and the
degree of protection provided by the NEMA ratings is
provided in the General Information Section of this

A harsh or benign location, washdown conditions, and
material physical properties must be considered in selecting
the enclosure materials. Even though the enclosure
material is fiberglass and very corrosion resistant, the
material for accessory items such as hinges, latches,
gaskets, etc., must be considered in material selection.

The internal security and safety needs must be evaluated
during the selection process. Hinge selections include
continuous hinge or fiberglass pin and sleeve hinge.
Fastening system options include a padlock hasp, linklock
latch and several series-specific latches including: keylock,
tamperproof lock (three point key lock, three point padlock),
wing knob and screw cover. These items are pictured
among the accessory items on pages 335 and 336.

Other optional features that should be considered include:
• Color
• Surface Finish
• Vents
• Louvers
• Cable/Conduit Connectors
• Door Stop
• Drip Shield
• EMI/RFI Shielding
• Back Panels
• Dead Front Panel
• Viewing Window
• Wiring Connections
• Enclosure Mounting
• Special Modifications

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