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BRIGHTER SOLUTIONS FOR DEMANDING ENVIRONMENTS.

North America Temp. Codes
(NEC-500) & CSA
IE / CENELEC / US
(NEC 505) T-CODES
Maximum Temperature
° C ° F
T1 T1 450 842
T2 T2 300 572
T2A 280 536
T2B 260 500
T2C 230 446
T2D 215 419
T3 T3 200 392
T3A 180 356
T3B 165 329
T3C 160 320
T4 T4 135 275
T4A 120 248
T5 T5 100 212
T6 T6 85 185
NFPA C Ignition F Ignition Hydrostatic Zone
Class I Group Temperature Temperature Pressure * Gas Groups
Acetylene A 305 581 6,000 PSI IIC
Hydrogen B 520 968 6,000 PSI IIC
Ethylene C 450 842 1,200 PSI IIB
Gasoline D 280 536 600 PSI IIA

* Typical tested hydrostatic pressure required for electrical fittings such as unions, elbows, seals, etc.

North America Temp. CodesIE / CENELEC / USMaximum Temperature
(NEC-500) & CSA(NEC 505) T-CODES° C° F
T1T1450842
T2T2300572
T2A280536
T2B260500
T2C230446
T2D215419
T3T3200392
T3A180356
T3B165329
T3C160320
T4T4135275
T4A120248
T5T5100212
T6T685185
Task Area Footcandles
Paint Booths 100 – 150
Corridors/Stairways/Restrooms 10 – 20
Storage Rooms 10 – 50
Conference Rooms 20 – 50
General Offices 50 – 100
Drafting/Accounting 100 – 200
Areas with VDTs 75
Classrooms 50 – 75
Cafeterias 50
Gymnasiums 30 – 50
Merchandising 30 – 150
Manufacturing Assembly 50 – 500
Parking Areas (uncovered) 1 – 2