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264 ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
D.3 Enclosure Ratings, Continued
IEC Designations,
continued
Table D-6 provides an approximate conversion from NEMA enclosure
type numbers to IEC enclosure classification designations. The NEMA
types meet or exceed the test requirements for the associated IEC
classifications; for this reason the Table cannot be used to convert
from IEC classifications to NEMA types.
Table D-6 NEMA Enclosure Type Numbers and Comparable IEC
Enclosure Classification
NEMA Enclosure
Type Number
IEC Enclosure
Classification Designation
1 IP 10
2 IP 11
3 IP 54
3R IP 14
3S IP 54
4 and 4X IP 56
5 IP 52
6 and 6P IP 67
12 and 12K IP 52
13 IP 54
NOTE: This comparison is based on tests specified in IEC Publication 529
Process Sealing
Process Sealing for Classes I, II, and III, Divisions 1 and 2 and Class
I, Zone 0, 1, and 2, Explosionproof Electrical Systems
ST 3000, Smart Pressure Transmitters
The ST 3000, Series 100, 100e, 600, and 900, Smart Pressure
Transmitters are CSA certified as “Dual Seal” devices in accordance
with ANSI/ISA–12.27.01–2003, Requirements for Process Sealing
between Electrical Systems and Flammable or Combustible Process
Fluids.
Accordingly, the ST 3000, Series 100, 100e, 600, and 900, Smart
Pressure Transmitters comply with the sealing requirements of NEC
Chapter 5. Special Occupancies, Article 500 — Hazardous (Classified)
Locations, Classes I, II, and III, Divisions 1 and 2, Article 501 — Class
I Locations, Article 501-15, Sealing and Drainage, (f) Drainage, (3)
Canned Pumps, Process or Service Connections, Etc., Article 505 —
Class I, Zone 0, 1, and 2 Locations, Article 505-16, Sealing and
Drainage, (E) Drainage, (3) Canned Pumps, Process, or Service
Connections, and So Forth., and the Canadian Electrical Code rules 18-