DREXAN HeatTracer User manual

HD110301-1 Rev2
Page 1of 23
Fire Sprinkler Freeze Protection
Design / Install Guide

HD110301-1 Rev2
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CONTENTS
Introduction Page 3
System Overview Page 4
Fire Suppression System Freeze Protection Applications Page 5
Typical Pipe Freeze Protection System Page 5
Fire Supply Lines Page 6
Sprinkler Standpipes Page 8
Branch Lines with Sprinklers Page 9
Freezer Applications Page 10
Fire Suppression System Freeze Protection Design Guide Page 11
STEP 1 –Collect the Required Information for Each Line Page 11
STEP 2 –Design Considerations Page 12
STEP 3 –Electrical Requirements Page 13
STEP 4 –Selecting Cable Power Output Page 13
STEP 5 –Cable Components Page 17
STEP 6 –Power Distribution Page 18
Installing Self-Regulating Cable Page 19
Testing Self-Regulating Cable Page 21
Heating Cable Test Report Page 22
Troubleshooting Self-Regulating Cable Page 23
Fire Sprinkler System Freeze Protection
Design / Install Guide
HAZARDOUS LOCATIONS

HD110301-1 Rev2
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INTRODUCTION
This design guide and installation manual from Drexan HeatTracer provides recommendations for
designing a pipe freeze protection system for fire sprinkler piping, using Drexan HeatTracer
MultiTracecables. It provides system design and performance data, information on heat tracing
monitoring and control, electrical sizing information, and various configuration recommendations.
This design guide assumes the fire protection system has been designed by others qualified in the
art.
MultiTrace is certified to all CSA / UL (CUS) standards for use throughout North America, as well as
ATEX 2014/34/EU for global applications and is suitable for both metal and non-metal pipes, tanks
and vessels. (see p.17).
This guide does not cover the following applications:
•Hazardous locations as defined in the National / Canadian Electric Code
•Supply voltages other than 100-130V or 208-277V
For assistance with application requirements that differ from those addressed in this document,
contact your Drexan representative or Drexan directly at 1-800-663-6873.
The following instructions will provide you with a step-by-step procedure for determining the best
solution for your fire sprinkler system freeze protection applications. An improperly designed and
installed heat tracing system could result in cable failure and possible physical injury.
The installation manual provides general guidance for installing the heating cable and components
on fire sprinkler piping. Additional installation instructions are included with the connection kits,
controllers, and accessories. If you are missing any required documents, you can download them
from the on-line document library at www.drexan.com.

HD110301-1 Rev2
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SYSTEM OVERVIEW
Drexan HeatTracer MultiTrace self-regulating cable is designed for freeze protection of above
ground and buried supply pipes, fire standpipes, branch lines and branch lines containing sprinklers
when run in areas potentially exposed to freezing temperatures.
Drexan offers 4 MultiTrace nominal cable power output options for fire sprinkler systems: 3W, 5W,
8W and 10W per foot
1
for applications using 100-130V and 208-277V power. Selection of the
correct power output for a given line size will ensure sprinkler systems do not overheat and that
electrical energy is efficiently used, while providing the required, reliable freeze protection.
A correctly designed and specified system will comprise the following:
Heating cable correctly selected for the line size at design minimum ambient temperatures
Power connections, tees and end seals based on piping configuration
Monitoring and control system
Power distribution panels complete with appropriate ground fault equipment protection
Accessories including attachment tapes and warning labels
Tools necessary for a complete installation and commissioning tests
Approvals
Drexan HeatTracer MultiTrace is CSA / UL (CUS) certified for use on fire suppression systems in North
America. The system covered in this manual includes supply lines, stand pipes, branch lines and
sprinkler heads.
1
at 50 degrees F

HD110301-1 Rev2
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FIRE SUPPRESSION SYSTEM FREEZE PROTECTION APPLICATIONS
Properly designed freeze protection systems maintain water temperature at a minimum of 40°F/4°C
to prevent fire suppression piping from freezing.
Fire Suppression System Freeze Protection Applications
A typical freeze protection system includes the heating cables, connection kits, cable monitoring
and temperature control, and power distribution.
FIG. 1 –TYPICAL FIRE / FREEZE PROTECTION SYSTEM

HD110301-1 Rev2
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Fire Supply Lines
MultiTrace is designed to maintain fire supply lines at 40°F/4°C in areas subject to freezing.
FIG. 2 –ABOVE GROUND SUPPLY PIPING
Application Requirements
The system complies with Drexan HeatTracer design and installation requirements for above ground
general water piping given the following conditions are met:
Heating cable is permanently secured to insulated metal pipes using TAPE-GCR-HT glass tape
or to plastic pipes using TAPE-AL aluminum tape
The system is controlled by a Controller with integrated ground fault protection with alarm
contacts connected to a fire control panel
Heating cable is installed per manufacturer’s instructions with approved connection kits.
Approvals
CSA / UL (CUS) certified for non-hazardous locations.

HD110301-1 Rev2
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FIG. 3 –TYPICAL BURIED PIPING SYSTEM
Application Requirements
The system complies with Drexan HeatTracer design and installation requirements for buried piping
given the following conditions are met:
The line is buried at least 2 feet/0.7 m deep
All heating cable connections are made above ground
The power connection and end seal connections are made above grade in Drexan HeatTracer
connection kits
Heating cable is protected from the pipe to the power connection box in CSA certified water-
sealed conduit with a minimum diameter of ¾” suitable for the location
The system is controlled by a Controller with integrated ground fault protection with alarm
contacts connected to a fire control panel
Closed cell waterproof thermal insulation with fire retardant waterproof covering approved
for direct burial is used over the cable and pipe
Heating cable is installed per manufacturer’s instructions with approved connection kits
Approvals
CSA / UL (CUS) certified for non-hazardous locations.

HD110301-1 Rev2
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Sprinkler Standpipes
MultiTrace is designed to maintain fire suppression system standpipes at 40°F/4°C in areas subject
to freezing.
FIG. 4 –STANDARD SPRINKLER STANDPIPE –Heating System Layout
Application Requirements
The system complies with Drexan HeatTracer design and installation requirements for freeze
protection of sprinkler system piping given the following conditions are met:
Schedule 5, 10, 20 or 40 steel sprinkler standpipe up to and including 20”diameter is used
UL listed fiberglass or closed cell flame-retardant insulation with weatherproof cladding is
used
The system is controlled by a Controller with integrated ground fault protection with alarm
contacts connected to a fire control panel
Control valve may be traced but requires removable insulation to allow inspection, and
requires a dedicated controller with RTD mounted on valve body and alarm contact for low
temperature alarm connected to a fire control panel
Heating cable is installed per manufacturer’s instructions with approved connection kits.
Approvals
CSA / UL (CUS) certified for non-hazardous locations.

HD110301-1 Rev2
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Branch Lines with Sprinklers
MultiTrace is designed to maintain branch lines containing sprinklers at 40°F/4°C in areas subject to
freezing.
FIG. 5 –TYPICAL FIRE SUPPRESSION SYSTEM FOR BRANCH LINES WITH SPRINKLERS
Application Requirements
The system complies with Drexan HeatTracer design and installation requirements for freeze
protection of fire suppression branch lines with sprinklers given the following conditions are met:
The heating cable is permanently secured to insulated metal pipes using TAPE-GCR-HT glass
tape or to plastic pipes using TAPE-AL aluminum tape
Temperature controller alarm contacts must be connected to the fire control panel
The system is controlled by a Controller with integrated ground fault protection with alarm
contacts connected to a fire control panel
The sprinkler design must account for the sprinkler shadow created by the outer diameter
of the thermal pipe insulation
Closed cell waterproof thermal insulation with flame-retardant waterproof covering is used
Heating cable is installed per manufacturer’s instructions with approved connection kits
Additional heating cable is run to compensate for sprinkler heads, sprigs, valves and pipe
supports as detailed in these design guidelines and installation instructions
Approvals
CSA /UL (CUS) certified for non-hazardous locations.

HD110301-1 Rev2
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Freezer Applications
MultiTrace is designed to keep condensate in dry sprinklers from freezing and may be installed in
freezers located in areas subject to freezing.
FIG. 6 –TYPICAL FIRE SUPPRESSION SYSTEM FOR FREEZER APPLICATIONS
Application Requirements
The system complies with Drexan HeatTracer design and installation requirements for fire
suppression systems for freezer applications given the following conditions are met:
The heating cable is permanently secured to insulated metal pipes using TAPE-GCR-HT glass
tape or to plastic pipes using TAPE-AL aluminum tape
The system is controlled by a Controller with integrated ground fault protection with alarm
contacts connected to a fire control panel
Closed cell waterproof thermal insulation with flame-retardant waterproof covering is used
The sprinkler design must account for the sprinkler shadow created by the outer diameter
of the thermal pipe insulation
Heating cable is installed per manufacturer’s instructions with approved connection kits
Additional heating cable is run to compensate for sprinkler heads, sprigs, valves and pipe
supports as detailed in these design guidelines and installation instructions
Approvals
CSA / UL (CUS) certified for non-hazardous locations.

HD110301-1 Rev2
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FIRE SUPPRESSION SYSTEM FREEZE PROTECTION DESIGN GUIDE
This section provides step-by-step instructions to design a fire suppression freeze protection
system. While the steps shown here allow for manual design, Drexan HeatTracer recommends the
use of the ProTrace Design Software to provide a compliant design complete with estimates of
power loads and detailed bills of material for the project.
STEP 1 –COLLECT THE REQUIRED INFORMATION FOR EACH LINE
Pipe diameter
Pipe length
Minimum ambient temperature
This is the minimum temperature expected (worst case) throughout the winter months
2
.
Maintain temperature
For freeze protection a typical maintain temperature of 4˚C/40˚F is sufficient.
Start-up temperature
This temperature will have a direct effect on the maximum circuit length and the breaker size
required. You should select the temperature at which the cable will normally become
energized, not necessarily the coldest temperature.
Metal or non-metallic Pipe
Some materials have superior heat transfer compared to others. For example, metal will
conduct heat better than a polymeric material. For this reason, we require the use of aluminum
foil tape (part# TAPE-AL) on polymeric pipes applied over the pipe under the cable.
Pipe hardware (valves, shoes, flanges etc.)
When measuring the total length of the pipe to be heat traced remember to allow extra cable
for the pipe hardware.
Thermal Insulation type & thickness
All pipes, equipment and pipe hardware must be thermally insulated as specified in the previous
section.
Measurement: Metric? Imperial? Temperature: Celsius? Fahrenheit?
Voltage: (include if 3 phase) _____________
APPLICATIONS
Pipe Tracing: Metal? Other? (specify) _______
Pipe Length: Diameter: Insulation Type:
Insulation Thickness: Not Yet Determined
Low Ambient Temp: Max. Pipe Temp: Maintain Temp:
Number of Supports Valves Hangers
2
If in doubt, refer to historical data at: http://climate.weather.gc.ca/index_e.html

HD110301-1 Rev2
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STEP 2 –DESIGN CONSIDERATIONS
When a pipe enters the heated area of a building it is important that the cable extends into
the building approximately 12” to ensure the pipe temperature is maintained above
freezing.
When a pipe enters the ground to below the frost line it is important to run the cable well
below the frost line (a minimum of 2 feet) to ensure the pipe temperature is maintained
above freezing.
When a main pipe has a short branch line connected to it, the branch line may be double-
traced (down & back) to eliminate the need for a Tee Splice Kit. Refer to detail in Figure 5.
Heating cable should not pass through the air. When crossing from one pipe to another, the
cable should run through a Flexible Extension (FLEX-E).
Select the cable wattage output to suit the application. A conservative design will specify a
slightly higher wattage output per foot of cable than required. However, this will consume
more electrical power over time and is not required with a correctly designed system.
A lower wattage cable has a longer circuit length. On projects with long runs, this reduces
the number of circuits, thereby lowering component and circuit costs and increasing
reliability by reducing the number of potential failure points in each connection. Always
design to use the lowest wattage heater for the given design conditions –it is bad practice
to use higher wattage cables than necessary.
Insulate all heat sinks (pipe hangars, pipe shoes, valves) in the heat tracing system. Allow
sufficient cable to trace additional heat sinks. Refer to Table 2.
DO NOT expose heating cables to temperatures higher than their temperature ratings.
For valves, install the heating cable so that the valves can be conveniently removed for
servicing.
The type and thickness of thermal insulation will have a direct effect on the amount of heat
required. Longer circuit lengths may be achieved by increasing the insulating thermal value
to lower the cable wattage output required. Refer to Table 1.
Multiple runs of cable may be required on larger pipes with high heat loss.

HD110301-1 Rev2
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STEP 3 –ELECTRICAL REQUIREMENTS
Design the heat tracing system using the most commonly expected start-up temperature.
Be practical. If you choose the most extreme (coldest possible) start-up temperature, for example
-40 degrees, you may unnecessarily shorten the circuit lengths, or require larger breaker sizes or
additional panels and power cable. However, keep in mind that if the heating system starts up at
a lower temperature than it was designed for, you may experience breaker tripping. Since fire
sprinkler systems are controlled to power on at 4°C/40°F, this temperature may be used for start-
up design.
To determine maximum circuit length and breaker size required, refer to tables found on the cable
data sheets available at www.drexan.com/
For voltages other than 120/240V refer to cable data sheets at www.drexan.com/
All heating cable systems require ground fault protection (27 or 30 mA trip level) as per the
National and Canadian Electrical Codes. This protection is provided in Drexan’s recommended
Controllers.
STEP 4 –SELECTING CABLE POWER OUTPUT
When determining the minimum ambient temperature for your location, always consider the
worst case or lowest temperature. Selecting a low ambient design temperature will provide an
increased safety factor.
From the following tables you can determine the amount of heat (watts/ft pipe) required to
maintain your pipe @ 40°F/4°C. MultiTrace is available in 4 nominal power outputs: 3W, 5W, 8W
and 10W per foot. If higher watt densities per foot are required, run multiple tracers on the line.
E.g. if 20W per foot is required, run 2 lengths of 10W cable.
For example: An ambient temperature of minus -20°F/-29°C and a 2” pipe with 1” of Glass Fiber
thermal insulation will require 3.8 Watts/foot of pipe.
Note: The charts used in this guide are based on Glass Fiber Thermal Insulation. These charts may
also be used with polyisocyanurate and Mineral Wool insulations of the same thickness.
Note: refer to the MultiTrace cable data sheet located on the Drexan HeatTracer Website:
www.drexan.com/

HD110301-1 Rev2
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Table 1
WATTS PER FOOT PIPE REQUIRED
Pipe Dia.
Ambient Temp.
Insulation Thickness
Inch
°F
°C
½"
1"
1 ½"
2"
2 ½"
3"
4"
½
0
-18
2.0
1.3
1.0
1.0
1.0
0.8
0.7
-10
-23
2.5
1.6
1.3
1.2
1.0
1.0
0.8
-20
-29
2.9
2.0
1.6
1.4
1.2
1.0
1.0
-40
-40
3.9
2.5
2.0
1.8
1.6
1.5
1.3
¾
0
-18
2.3
1.5
1.2
1.0
1.0
0.8
0.7
-10
-23
2.9
1.9
1.5
1.3
1.0
1.0
0.9
-20
-29
3.5
2.2
1.8
1.5
1.4
1.3
1.0
-40
-40
4.5
2.9
2.3
2.0
1.8
1.6
1.4
1
0
-18
2.8
1.7
1.4
1.2
1.0
1.0
0.8
-10
-23
3.4
2.1
1.7
1.4
1.3
1.2
1.0
-20
-29
4.1
2.5
2.0
1.7
1.5
1.4
1.2
-40
-40
5.3
3.3
2.6
2.2
2.0
1.8
1.6
1 ¼
0
-18
3.3
2.0
1.6
1.3
1.0
1.1
0.9
-10
-23
4.1
2.5
2.0
1.6
1.4
1.3
1.1
-20
-29
4.9
3.0
2.3
1.9
1.7
1.6
1.3
-40
-40
6.4
3.9
3.0
2.5
2.2
2.0
1.8
1 ½
0
-18
3.7
2.2
1.7
1.4
1.3
1.1
1.0
-10
-23
4.5
2.7
2.1
1.8
1.5
1.4
1.2
-20
-29
5.4
3.3
2.5
2.0
1.8
1.7
1.4
-40
-40
7.1
4.3
3.3
2.7
2.4
2.2
1.9
2
0
-18
4.4
2.6
2.0
1.6
1.4
1.3
1.1
-10
-23
5.5
3.2
2.4
2.0
1.8
1.6
1.4
-20
-29
6.5
3.8
2.9
2.4
2.1
1.9
1.6
-40
-40
8.6
5.0
3.8
3.1
2.7
2.5
2.1
2 ½
0
-18
5.2
3.0
2.3
1.8
1.6
1.4
1.2
-10
-23
6.4
3.7
2.8
2.3
2.0
1.8
1.5
-20
-29
7.6
4.4
3.3
2.7
2.4
2.1
1.8
-40
-40
10.0
5.8
4.3
3.6
3.0
2.8
2.3
3
0
-18
6.1
3.5
2.6
2.1
1.8
1.6
1.4
-10
-23
7.6
4.3
3.2
2.6
2.3
2.0
1.7
-20
-29
9.0
5.2
3.8
3.0
2.7
2.4
2.0
-40
-40
11.9
6.8
5.0
4.0
3.5
3.1
2.6
4
0
-18
7.6
4.3
3.1
2.5
2.2
1.9
1.6
-10
-23
9.5
5.3
3.9
3.1
2.7
2.3
1.9
-20
-29
11.3
6.3
4.6
3.7
3.2
2.8
2.3
-40
-40
14.9
8.3
6.0
4.9
4.1
3.7
3.0

HD110301-1 Rev2
Page 15 of 23
Table 1 cont.
WATTS PER FOOT PIPE REQUIRED
Pipe Dia.
Ambient Temp.
Insulation Thickness
Inch
°F
°C
½"
1"
1 ½"
2"
2 ½"
3"
4"
6
0
-18
11.0
6.0
4.6
3.4
2.8
2.5
2.0
-10
-23
13.5
7.4
5.3
4.2
3.5
3.1
2.5
-20
-29
16.0
8.8
6.3
5.0
4.2
3.7
3.0
-40
-40
21.1
11.6
8.2
6.5
5.5
4.8
3.9
8
0
-18
14.0
7.5
5.3
4.2
3.5
3.0
2.4
-10
-23
17.2
9.3
6.6
5.2
4.3
3.8
3.0
-20
-29
20.5
11.0
7.8
6.2
5.2
4.5
3.6
-40
-40
27.0
14.6
10.3
8.1
6.8
5.9
4.7
10
0
-18
17.0
9.2
6.4
5.0
4.2
4.0
3.0
-10
-23
21.0
11.4
8.0
6.2
5.2
5.0
4.0
-20
-29
26.0
13.6
10.0
7.4
6.2
5.3
4.2
-40
-40
34.0
18.0
13.0
10.0
8.1
7.0
6.0
12
0
-18
20.0
11.0
8.0
6.0
5.0
4.2
3.3
-10
-23
25.0
13.3
9.3
7.2
6.0
5.1
4.1
-20
-29
30.0
16.0
11.0
9.0
7.0
6.1
5.0
-40
-40
39.0
21.0
15.0
11.3
9.3
8.0
6.4
14
0
-18
22.0
12.0
8.0
6.3
5.2
5.0
4.0
-10
-23
27.2
15.0
10.0
8.0
7.0
6.0
4.4
-20
-29
33.0
17.3
12.0
9.3
8.0
7.0
5.2
-40
-40
43.0
23.0
16.0
12.2
10.1
9.0
7.0
16
0
-18
25.0
13.2
9.2
7.1
6.0
5.0
4.0
-10
-23
31.0
17.0
11.4
9.0
7.3
6.2
5.0
-20
-29
37.0
20.0
14.0
11.0
9.0
7.4
6.0
-40
-40
48.5
26.0
18.0
14.0
11.3
10.0
8.0
18
0
-18
28.0
15.0
10.2
8.0
7.0
6.0
4.3
-10
-23
35.0
19.0
13.0
10.0
8.0
7.0
5.4
-20
-29
42.0
22.0
15.0
12.0
10.0
8.2
6.4
-40
-40
54.3
29.0
20.0
15.3
13.0
11.0
8.4
20
0
-18
31.0
17.0
11.3
9.0
7.0
6.1
5.0
-10
-23
38.0
21.0
14.0
11.0
9.0
8.0
6.0
-20
-29
46.0
24.0
17.0
13.0
11.0
9.0
7.0
-40
-40
60.2
32.0
22.0
17.0
14.0
12.0
9.2
24
0
-18
37.0
20.0
14.0
11.0
9.0
7.1
6.0
-10
-23
46.0
24.0
17.0
13.0
11.0
9.0
7.0
-20
-29
55.0
29.0
20.0
15.0
13.0
11.0
8.0
-40
-40
72.0
38.0
26.0
20.0
16.3
14.0
11.0

HD110301-1 Rev2
Page 16 of 23
The following Table 2 shows the amount of extra cable required to heat trace pipe hardware such
as valves and supports.
Allow an extra 4 feet of cable per cable circuit run for the power and end seal terminations.
Example: 3 feet for the power termination and 1 foot for the end termination.
Table 2
HEAT LOSS ADDERS (CABLE PER FOOT)
Pipe Hardware Types
Pipe Size
Inches
Flange
Per Pair
Vent
Drain
Pipe
Support
Globe, Ball
& Butterfly
Gate
Valve
½
0.3
1
1
1
1
¾
0.3
1
1.5
1
1.5
1
0.3
1
1.5
1
2
1 ¼
0.3
1
2
1.5
2.5
1 ½
0.3
1
2
1.5
2.5
2
0.3
1
2
2
2.5
2 ½
0.3
1
2
2.5
3
3
0.3
1
2
2.5
3
4
0.5
1
2.5
3
4
6
0.8
1
2.5
3.5
5
8
0.8
1
2.5
4
7
10
0.8
1
3
4.5
8
12
0.8
1
3
5
9
14
1
1
3
5.5
10
16
1
1
3.5
6
11
18
1
1
3.5
7
12
20
1
1
3.5
7.5
13
24
1
1
4
8
15

HD110301-1 Rev2
Page 17 of 23
STEP 5 –CABLE COMPONENTS
A typical heat tracing system will include cable, cable components and controls, as required.
Drexan offers 3 families of connection components. For most installations, AMIGA components
are recommended as they can connect up to three heaters to power or be used as an inline splice
(no power) or inline tee (no power). HeatShrink® kits are economical and familiar to most
contractors.
*AMIGA Power / Tee / Splice
AMIGA is an advanced connection system designed for use with the Drexan
HeatTracer family of Self-Regulating PipeGuard cables. AMIGA can connect up
to three heaters to power or be used as an inline splice (no power) or inline
tee (no power).
AMIGA consists of a pipe-mounted stanchion and an enclosure (junction box)
with terminal blocks mounted on DIN rail. The AMIGA stanchion provides
ample room in which installers can manipulate heating cables, has excellent
mechanical protection for cables installed on a pipe, and permits application of
up to 4 inches (102 mm) of thermal insulation.
AMIGA is CSA/UL (CUS) certified for both non-hazardous and hazardous
locations up to Class I Division 2 (Zone 2).
HeatShrink Components
*ƗHS-PC
Power Connection
(Junction box not included)
*ƗHS-TSPLICE
Splice Kit
*ƗHS-ESK
End Seal Kit
HS-JB
Junction Box
APPROVALS
Class I, Div. 2, Groups A, B, C, D
231572 Class II, Div. 2, Groups E, F, G
Class III
E484945*/E480818Ɨ

HD110301-1 Rev2
Page 18 of 23
STEP 6 –POWER DISTRIBUTION
Power to the heating cables can be provided directly or through external contactors. For large
jobs where power distribution panels are desired, contact Drexan HeatTracer for design and
delivery.
Single circuit control: Heating cable circuits that do not exceed the current rating of the selected
Controllers can be switched directly.
Group control: If current draw of the system exceeds the switch rating, or if the controller will
activate more than one circuit in group control, an external contactor must be used.

HD110301-1 Rev2
Page 19 of 23
INSTALLING SELF REGULATING CABLE
Install heating cable on the bottom half of the pipe between 4 & 8 o’clock. Install cable
straight along the pipe. In some instances, it may be necessary to install more than one run
or spiral the cable around the pipe. Example: pipe heat loss requires 12 W/ft., cable output
is 8 W/ft., therefore apply 1.5 feet cable per foot of pipe.
For typical installations the heating cable should be fastened with fiberglass tape.
Note: Do not use metal strapping or tie wire to fasten cable to pipe.
Aluminum foil tape (TAPE-AL) is typically used when installing heating cable on plastic pipes.
Applying a layer of foil tape on the pipe under the cable provides more efficient heat
transfer. An additional layer of foil tape fastening the cable to the pipe also assists in the
heat transfer and can prevent the cable from being embedded in the insulation.
Do not cut the cable until it is fastened to the pipe. This ensures you will have a sufficient
amount of cable for terminations and heat sinks such as valves, flanges, pipe supports and
any other piping equipment.
Install the heating cable in such a way as to allow for easy removal of valves and other
equipment.
Heating cable ends must be kept dry at all times. Until the cable is terminated, all ends should
be sealed from the environment with a moisture proof tape.
When pipe is buried, ensure the power and end of circuit terminations are above grade.
After insulation has been applied to the pipe, over the cable, visually inspect to ensure there
are no gaps in the seams or damage to the insulation.
Note: An improperly insulated pipe will result in a cold pipe.

HD110301-1 Rev2
Page 20 of 23
FIG. 7