This document provides information on linear heat detection cables for fire detection. It discusses the various applications and environments that linear heat detection can be used in, such as outdoor applications and harsh chemical environments. It also describes the different jacket coatings available for the cables depending on the application. The document reviews how to calculate the necessary cable length and identifies the typical components involved in a linear heat detection zone, including junction boxes, mounting hardware, and end of line resistors. It notes linear heat detection can interface with both conventional and addressable fire alarm panels. Additional resources on the product are also listed.

1. Application Bulletin
LINEARHEATDETECTION
January, 2016
Education Series: Fire Detection Education Program VOL 1
Special Hazard Fire Detection
Introduction to LHD
FIRE DETECTION, INC.FIRE DETECTION, INC.
Distance Locating
Safe Fire Detection
5915 Stockbridge Dr.
Monroe, NC 28110
safefiredetection.com
FIRE DETECTION, INC.FIRE DETECTION, INC.
To add other engineers: Email
staff@safefiredetection.com

2. LINEARHEATDETECTION
January, 2016
Education Series: Fire Detection Education Program VOL 1
Special Hazard Fire Detection
Applications:
FIRE DETECTION, INC.FIRE DETECTION, INC.
There are many commercial and industrial applications for linear heat detection. Linear heat
detection works in many environments smoke detection will not. Linear heat detection can
withstand harsh chemical environments and outdoor applications as well. Additional jacket
coatings can be applied over the standard PVC outer covering for special applications.
Special Outer Jacket Coatings
1. (PVC) Standard, for all typical indoor applications
2. (Nylon) Heavy Duty projects and outdoor applications
3. (Polypropylene) For chemical environments
4. (Guide-wire) A steel outer cable wound around the LHD cable to allow for long distance
suspension of the cable in open areas.
Application Bulletin

3. LINEARHEATDETECTION
January, 2016
Education Series: Fire Detection Education Program VOL 1
Special Hazard Fire Detection
Installation:
FIRE DETECTION, INC.FIRE DETECTION, INC.
Cable Length
Calculation
Hazard Length
+
10% Sag
+
10% Waste
Total Length
Outer Jacket Coatings
(PVC) Standard, for all
typical applications
(N) Nylon for conveyors
industrial and outdoor aps
(P) Poly for chemical aps
(G) Guidewire applications
Below you will find a typical linear heat detection zone. Standard components for a typical zone
consists of the LHD wire or optional leaders wires that can come directly from the fire alarm
panel or addressable module.
Components
1. Optional Distance Locator 4. Mounting (Every 3’ or 1m)
2. Junction Box (JBox) 5. Strain Relief Connector
3. Strain Relief Connector 6. End of Line Resistor (ELR) Jbox
NOTE: End of Line Resistor
Supplied with Fire
Alarm Panel
Typical
Cable Temperatures
Application Bulletin

4. LINEARHEATDETECTION
January, 2016
Education Series: Fire Detection Education Program VOL 1
Special Hazard Fire Detection
Fire Alarm Panel Interface:
FIRE DETECTION, INC.FIRE DETECTION, INC.
NOTE: End of Line Resistor
Supplied with Fire
Alarm Panel
ADDRESSABLE SYSTEM
CONFIGURATION
CONVENTIONAL SYSTEM
CONFIGURATION
Additional Resources:
Additional application, installation and maintenance resources are attached.
Linear heat detection can
be connected directly to
conventional and
addressable fire alarm
panels or addressable
modules
Fire Alarm
Panels
Application Bulletin
1. SafeCable Data Sheet
2. SafeCable Installation and Maintenance Resource Guide
3. RedGear Installation Material and Code Guide
4. SafeCable Engineering Specification