Chromalox Big Red Book

Circulation

Circulation Heaters Terminal Enclosures

ATEX/IECEx/CSA Zone Classification Selection chart for terminal enclosure standoff dimension based on 30°C rise over 40°C ambient

Vertical Heater Orientation Horizontal Heater Orientation Minimum Standoff Dimension Minimum Standoff Dimension Inches mm Inches mm

70°C Cable Supply

Temperature Code Wet Face Temperature: °F Wet Face Temperature: °C

T6 T5

185 212 248 275 320 329 356 392 419 446 500 536 572 842 185 212 248 275 320 329 356 392 419 446 500 536 572 842 185 212 248 275 320 329 356 392 419 446 500 536 572 842

85

3 3 5 6

76 76

1 2 3 3 4 4 5 5 5 6 6 6

25 50 76 76

100 120 135 160 165 180 200 215 230 260 280 300 450

T4A

127 152 191 191 191 229 229 229 267 267 267 343

T4

T3C T3B T3A T2D T2C T2B T2A T3

7.5 7.5 7.5

102 102 127 127 127 152 152 152 191 229

9 9 9

CIRCULATION HEATERS

10.5 10.5 10.5 13.5

T2 T1

7.5

9

ATEX/IECEx/CSA Zone Classification Selection chart for terminal enclosure standoff dimension based on 10°C rise over 60°C ambient

Vertical Heater Orientation Horizontal Heater Orientation Minimum Standoff Dimension Minimum Standoff Dimension Inches mm Inches mm

70°C Cable Supply

Temperature Code Wet Face Temperature: °F Wet Face Temperature: °C

T6 T5

85

9

229 267 305 305 305 305 343 381 381 381 419 457 457 610

6

152 191 191 191 191 229 229 229 267 267 267 267 267 305

100 120 135 160 165 180 200 215 230 260 280 300 450

10.5

7.5 7.5 7.5 7.5

T4A

12 12 12 12 15 15 15 18 18 24

T4

T3C T3B T3A T2D T2C T2B T2A T3

9 9 9

13.5

10.5 10.5 10.5 10.5 10.5

16.5

T2 T1

12

CSA Class and Division Classification Selection chart for terminal enclosure standoff dimension based on 85°C rise over 40°C ambient

Vertical Heater Orientation Horizontal Heater Orientation Minimum Standoff Dimension Minimum Standoff Dimension Inches mm Inches mm

125°C Cable Supply

Temperature Code Wet Face Temperature: °F Wet Face Temperature: °C

T6 T5

85

0 0 0 0 2 2 4 4 4 4 6 6 6

0 0 0 0

0 0 0 0 0 0 2 2 2 2 4 4 4 6

0 0 0 0 0 0

100 120 135 160 165 180 200 215 230 260 280 300 450

T4A

T4

T3C T3B T3A T2D T2C T2B T2A T3

50 50

102 102 102 102 152 152 152 191

50 50 50 50

102 102 102 152

T2 T1

7.5

C-7