| F – | Flush Mount |
|---|---|
| I – | Internal Mount |
| P – | Pressure test against water leaks. |
| S – | Corrosion resistant coating |
| SC – | Corrosion resistant coating core only |
| SH – | Corrosion resistant coating housing only |
| SS – | Stainless Steel Housing |
| ST – | Stainless Steel In/Outlets (air to water) |
| SAC – | Stainless Steel coils aluminum fins (air to water) |
| HL – | External Hazardous Location Fan (purge unit) Div 2 |
| HL2 – | Hazardous Location Fan (non purge) Div 2 |
| XP – | Hazardous Location (unit with blower) Div 1 & 2 |
| Type 12 – | UL type 12 NEMA 12 |
| Type 4 – | UL type 4 NEMA 4 |
| Type 4X – | UL type 4X NEMA 4X (air to water) |
| CE – | European safety standard (Communiqué European) |
| RH – | Rain hood (flush Air to Air mount units) UL Type 3R |
| UF – | Universal Fan (wet location, washdown and sun exposure applications) |
| W – | Wash Down Fan |
| WL – | Wet location fan (UL recognized for hosedown) |
| WL – RH | WL fan and rain hood (type 4/outdoor) |
| NP – | Custom |
| NF – | No-fans |
| NIF – | No inside fan |
| NOF – | No outside fan |
| RF – | Reversed fan |
| RIF – | Reversed inside fan |
| ROF – | Reversed outside fan |
NEMA DESIGNATIONS
The National Electrical Manufacturer’s Association (NEMA) has developed a set of standards for the Electrical Industry to assist the user and the manufacturer in the identification and the standardization of many electrical components.
- NEMA Type 1– General Purpose indoor. Type 1 enclosures are intended for use INDOORS, primarily to prevent accidental contact of personnel with the enclosed equipment, in areas where unusual service conditions do not exist.
- NEMA Type 12– Dust tight, drip tight. Type 12 enclosures are intended for use INDOORS to protect the enclosed equipment against falling non-corrosive liquids and falling dirt.
- NEMA Type 3-Dustight, Raintight and Sleet/Ice Resistant Outdoor. Type 3 enclosures are intended for use OUTDOORS to protect the enclosed equipment against windblown dust and water.
- NEMA Type 3R– Raintight and Sleet/Ice Resistant Outdoor. Type 3R enclosures are intended for use OUTDOORS to protect the enclosed equipment against rain and meet the requirements of Underwriters’ Labs UL508 applying to “Rainproof Enclosures”.
- NEMA Type 4– Watertight and Dusttight Indoor and Outdoor. Type 4 enclosures are intended for use INDOORS or OUTDOORS to protect the enclosed equipment against splashing water, seepage of water, falling or hose directed water, and severe external condensation.
- NEMA 4X– Watertight, Dust tight and Corrosion Resistant Indoor and Outdoor. Type 4X enclosures have the same protection and provisions as Type 4 enclosures, and in addition, are corrosion- resistant.
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