- Prevents water from freezing in metal or plastic pipes
- Maintains temperature in pipes for a wide variety of industrial processes
- Supplied by the metre – order as much or as little as required
- Range includes ATEX approved cables and accessories
Range & Prices
The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.
Cables
NOTE: EX (ATEX) cables can be used in both hazardous and non-hazardous areas.
Model | W/m | List Price/m (under 50m) | List Price /m (50m+) |
CRJM-11 | 11 | £11.50 | £10.50 |
CRJM-17 | 17 | £12.00 | £11.00 |
CRJ-25EX | 25 | £21.00 | £20.00 |
CRJ-40EX | 40 | £22.00 | £21.00 |

CRJM cable is suitable for installation on plastic and metal pipes
Accessories
Model | Description | List Price | |
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CRJ-T1 | Termination Kit (one per circuit) uses shrink on material – not for use when ATEX approval required. Prepares one end for electrical connection and seals the far end. | £19.00 |
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THK | Termination Kit (one per circuit) uses silicone – can be used when ATEX approval required or for general purpose applications (not for use with CRJM). Prepares one end for electrical connection and seals the far end. | £42.00 |
THKM | Termination Kit (one per circuit) uses silicone – for use with CRJM. Prepares one end for electrical connection and seals the far end. | £42.00 | |
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CRJ-S | Splice /T Kit (one for every splice or T joint) – uses shrink on material – not for use when ATEX approval required – max temperature 80˚C | £20.00 |
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PF-T | Fixing Tape (33m x 19mm) for fixing cable to pipe – max temp 80°C | £3.50 |
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AL-50 | Aluminium Tape (45mm x 50mm) – for wrapping plastic pipes before installing cable or for fixing cable to pipe – max temp 110°C | £14.00 |
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PF-L | Caution Labels (10 pack) apply to outside of insulation | £8.00 |
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THB | Stainless Steel Bracket for junction box or THT thermostat c/w stainless steel bands for fixing to pipe – for insulation up to 50mm thick and pipes up to 150mm diameter | £26.00 |
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THJ | Junction Box IP66 6-way terminal block 40A max | £42.00 |
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THJEX | ATEX Junction Box with 3 x M20 entries (one plugged) 6-way terminal block 16A max | £190.00 |
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THT | Capillary Thermostat 5 to 50°C IP66 (16A) | £135.00 |
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THTEX | ATEX Capillary Thermostat 0 to 40°C IP66 (16A) | £672.00 |
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FST2-IN | Frost Thermostat Indoor Use (20A) | £88.00 |
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FST2-EX | Frost Thermostat Outdoor Use (20A) IP66 | £166.00 |
Technical Specification
Application | Water pipe freeze protection |
Temperature maintenance (up to 50˚C) | |
Voltage | 230V |
Outputs | 11 to 40W/m (see selection table) |
Construction | Parallel (can be cut to length without affecting output per metre) |
Earth protection | Continuous metal braid |
Outer jacket | Thermoplastic |
Maximum exposure temperature (power on) | 65˚C (CRJM) 85˚C (CRJ) |
Maximum exposure temperature (power off) | 85˚C |
Minimum installation temperature | -40˚C |
Ingress protection | IP67 |
Minimum bending radius | 35mm |
Weight (kg/100m) | 9.3 (CRJM) 11.8 (CRJ) |
EX (ATEX) Cables
NOTE: EX (ATEX) cables can be used in both hazardous and non-hazardous areas
Zone | 1,2,21 & 22 |
Group | IIC (gas) IIIC (dust) |
Temperature Class | T6 |
Maximum Length (m) / Circuit Breaker Size (type C)
Cable | Start-up Temp (˚C) | 10A | 16A | 20A | 32A |
CRJM-11 | +5 | 76 | 126 | 128 | —— |
0 | 70 | 118 | 128 | —— | |
-20 | 46 | 78 | 124 | 128 | |
CRJM-17 | +5 | 54 | 88 | 102 | —— |
0 | 50 | 84 | 102 | —— | |
-20 | 34 | 56 | 88 | 102 | |
CRJ-25EX | +10 | 74 | 118 | 124 | 124 |
0 | 68 | 108 | 120 | 120 | |
-20 | 60 | 94 | 112 | 112 | |
CRJ-40EX | +10 | 46 | 74 | 92 | 98 |
0 | 42 | 66 | 84 | 94 | |
-20 | 36 | 58 | 74 | 88 |
Selection
If you would like the experts at BN Thermic to select a pipe freeze protection system for you, please click below to access our enquiry form. Simply provide as much information as you have available and we will respond with a detailed proposal.
Cable Selection
Selection Table – Pipe Freeze Protection (based on a minimum ambient temperature of -20˚C and mineral wool insulation). Cable installed in a straight line. | |||
Outside Pipe Diameter | Insulation Thickness (mm) | ||
12 | 25 | 50 | |
12mm ( ½” Pipe) | CRJM-11 | CRJM-11 | CRJM-11 |
25mm ( 1” Pipe) | CRJM-11 | CRJM-11 | CRJM-11 |
50mm (2” Pipe) | CRJM-17 | CRJM-11 | CRJM-11 |
75mm (3” Pipe) | CRJ-25EX | CRJM-17 | CRJM-11 |
100mm (4” Pipe) | CRJ-40EX | CRJM-17 | CRJM-11 |
150mm (6” Pipe) | —– | CRJ-25EX | CRJM-17 |
200mm (8” Pipe) | —– | CRJ-40EX | CRJM-17 |
Note: a frost thermostat is always recommended
Selection Table -Temperature Maintenance Protection (based on a minimum ambient temperature of -15˚C, carbon steel pipe and mineral wool insulation). Cable installed in a straight line. | |||
Outside Pipe Diameter | Pipe Temperature | 25mm Thick Insulation | 50mm Thick Insulation |
25mm (1” Pipe) | 20°C | CRJ-25EX | CRJ-25EX |
30°C | CRJ-25EX | CRJ-25EX | |
40°C | CRJ-40EX | CRJ-25EX | |
50°C | —– | CRJ-40EX | |
50mm (2” Pipe) | 20°C | CRJ-25EX | CRJ-25EX |
30°C | CRJ-40EX | CRJ-25EX | |
40°C | —– | CRJ-40EX | |
50°C | —– | CRJ-40EX | |
75mm (3” Pipe) | 20°C | CRJ-25EX | CRJ-25EX |
30°C | CRJ-40EX | CRJ-40EX | |
40°C | —– | CRJ-40EX | |
100mm (4” Pipe) | 20°C | CRJ-40EX | CRJ-25EX |
30°C | —– | CRJ-40EX | |
40°C | —– | CRJ-40EX |
Important Notes – when selecting cable for temperature maintenance applications
Changes in selection parameters can affect cable selection. Please call BN Thermic to discuss cable selection for your project.
Additional pipe temperature control is always recommended
This selection table is designed to cover the more commonly encountered applications. If your requirements fall outside the limit of this table, please call BN Thermic.
Nominal output for cable installed on an insulated carbon steel pipe

Nominal output for cable installed on an insulated carbon steel pipe

BN Thermic can assist you in selecting the right cable
Videos
Images
- CRJ cable can be spliced which is very common for sprinkler system installations
- CRJM is available ATEX approved for zones 1, 2, 21 and 22
Installation images
- CRJ cable is energy saving - power consumtion decreases as pipe temperature increases
- BN Thermic can assist you with selecting the right cable
Downloads
CRJ Instructions
CRJM Instructions
CRJ Specification Sheet
CRJ-S Instructions
CRJ-T1 Instructions
THK Instructions