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High-Temperature Self-Regulating Heating Cable (SLHCBL)

Ordering Options:
Starting at $10.70
/ FT

Description

Cut-to-length high-temperature self-regulating heating cable (SLHCBL) is ideal for freeze protection and high temperature process maintenance up to 248°F (120°C). Self-regulating heating trace cable self-regulates temperature by automatically adjusting heat output based on surface and ambient temperatures. Choose between two different outer layers for ordinary or strong chemical environments. No temperature controller is required.

Note: Special consideration must be given for the circuit breaker due to the high-initial in-rush currents

B notes Tinned Copper Metal Braid for ordinary applications
BF notes Tinned Copper Metal Braid with Fluoropolymer Overjacket for strong chemical environments (i.e. strong acids)

 

Part Number

SLHCBL-series

Additional Features: 

  • Safe to overlap and insulate
  • Can be cut-to-length and terminated in the field
  • Moisture, chemical, and flame resistant

Maximum Continuous Maintenance Temperature: 248°F (120°C)
Intermittent Exposure Temperature Range: -22°F to 392°F (-30°C to 200°C)
Supply Voltage: 110-120 VAC or 208-277 VAC
Nominal Power Output at 50°F (10°C):

  • 5, 10, 15, 20 W/ft (15, 30, 45, 60 W/m)
  • For 208 and 277 VAC, adjust watts shown for the 240 VAC cable using the Voltage Adjustment Factors Chart 

Bus Wire Gauge: 16 AWG
Braid Resistance: Tinned copper 0.0055 ohms/ft (0.0182 ohms/m)
Bend Radius: 0.5 in (12 mm)
Note: If a specific process temperature is required a temperature controller is necessary

 

 

Voltage Adjustment Factors: Watt/ft Ouput

Product Type  208 VAC  277 VAC 
SLHCBL5240 0.87  1.07
SLHCBL10240 0.88 1.08
SLHCBL15240 0.88 1.08
SLHCBL20240 0.86 1.07

Start-up Temperature

Heating Cable  Circuit Breaker Size Start-up Temperature
50°F (10°C) 32°F (0°C) -4°F (-20°C) -40°F (-40°C)
SLHCBL5120 10 amp 120 (37) 110 (34) 105 (32) 90 (27)
15 amp 180 (55) 175 (53) 158 (48) 143 (44)
20 amp 240 (73) 215 (66) 190 (58) 180 (55)
30 amp 259 (79) 245 (75) 240 (73) 225 (69)
40 amp 266 (81) 255 (78) 250 (76) 240 (73)
SLHCBL5240 10 amp 240 (73) 220 (67) 210 (64) 180 (55)
15 amp 360 (110) 350 (107) 315 (96) 285 (87)
20 amp 479 (146) 430 (131) 380 (116) 360 (110)
30 amp 518 (158) 490 (149) 480 (146) 450 (137)
40 amp 531 (162) 510 (155) 500 (152) 480 (146)
SLHCBL10120 10 amp 73 (22) 69 (21) 65 (20) 58 (18)
15 amp 118 (36) 110 (34) 98 (30) 88 (27)
20 amp 148 (45) 140 (43) 130 (40) 118 (36)
30 amp 220 (67) 200 (61) 182 (56) 175 (53)
40 amp 255 (78) 240 (73) 220 (67) 230 (70)
SLHCBL10240 10 amp 146 (45) 138 (42) 130 (40) 116 (35)
15 amp 236 (72) 220 (67) 195 (59) 175 (53)
20 amp 295 (90) 280 (85) 260 (79) 235 (72)
30 amp 440 (134) 400 (122) 364 (111) 350 (107)
40 amp 510 (155) 480 (146) 440 (134) 460 (140)
SLHCBL15120 10 amp 50 (15) 47 (14) 42 (13) 40 (12)
15 amp 75 (23) 65 (20) 63 (19) 60 (18)
20 amp 100 (31) 90 (27) 83 (25) 80 (24)
30 amp 143 (44) 135 (41) 125 (38) 120 (37)
40 amp 190 (58) 175 (53) 168 (51) 160 (49)
SLHCBL15240 10 amp 100 (31) 93 (28) 83 (25) 80 (24)
15 amp 150 (46) 130 (40) 125 (38) 120 (37)
20 amp 200 (61) 180 (55) 165 (50) 160 (49)
30 amp 285 (87) 270 (82) 250 (76) 240 (73)
40 amp 380 (116) 350 (107) 335 (102) 320 (98)
SLHCBL20120 10 amp 39 (12) 33 (10) 34 (10) 32 (10)
15 amp 58 (18) 55 (17) 50 (15) 48 (15)
20 amp 75 (23) 71 (22) 68 (21) 63 (19)
30 amp 115 (35) 105 (32) 100 (31) 95 (29)
40 amp 153 (47) 143 (44) 133 (41) 125 (38)
SLHCBL20240 10 amp 77 (24) 70 (21) 67 (20) 63 (19)
15 amp 115 (35) 110 (34) 100 (31) 95 (29)
20 amp 150 (46) 142 (43) 135 (41) 125 (38)
30 amp 230 (70) 210 (64) 200 (61) 190 (58)
40 amp 306 (93) 286 (87) 265 (81) 250 (76)

Outer Layer Options

Product Type Description Nominal Dimensions [thickness x width] in (mm)  Shipping Weight: 500 ft (152 m) spool lbs (kg)  Purpose 
SLHCBL-B Tinned Copper Metal Braid 0.15 x 0.45 (3.8 x 11.4) 38 (17)  Ordinary Locations
SLHCBL-BF Tinned Copper Metal Braid with Fluoropolymer Overjacket 0.19 x 0.49 (4.8 x 12.4) 47 (21)  For use in strong chemical environments (ie. Strong acids)

 

How Self-Regulating Cable Works

 

  • The semi-conductive core material contains a graphite network, which allows electricity to flow from one bus wire to the other. When the core is dense and colder, there are many paths for electricity to take through the graphite network, producing more heat.
  • Since the core material expands as it heats, the graphite network is elongated, disrupting some of the paths. More and more paths are disrupted as heating continues until the system reaches self-controlled thermal stability. When the core material cools, it contracts, reconnecting some of the electrical paths in the graphite network, and more equivalent heat is produced.
  • This temperature response occurs independently at each point along the heater. If an externally produced high temperature occurs next to a low temperature in the cable, each section of heating cable will adjust its own heat output in relation to its own local requirements.
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