Installation Manual

This guide presents Raychem's recommendations for designing and ElectroMelt
snow-melting and anti-icing system for use in concrete pavement. Do not use
the ElectroMelt system buried in asphalt.
WARNING: ElectroMelt heating cable and associated system components
are electrical devices that must be designed and installed properly.
Follow all design, installation, assembly, and test instructions to ensure
proper operation and to prevent shock or fire. Warnings are highlighted
with in the manual.
Following these recommendations will result in a reliable, energy-efficient system.
For information regarding other heat-tracing applications, contact your Raychem
representative.
The ElectroMelt System Design Guide provides instructions to all engineering
disciplines and trades involved in the design and installation of an Electro Melt
System. It provides design and performance data, electrical sizing information,
and heating-cable layout suggestions.
If, after reading this design guide, you still have questions concerning the design
of an ElectroMelt system, contact your Raychem representative. For instructions
on installing an ElectroMelt system be sure to read and follow the ElectroMelt
Installation and Operations Manual (H53392).
In addition to this design guide, electrical and mechanic design engineers
should also use the ElectroMelt Installation and Operations Manual as a general
reference document during the design of an ElectroMelt system. They should
use it during installation as well to coordinate the work of the trades involved.
During and after startup, they should use the manual to record important design
and test data.
Before design work begins, designers should review appropriate sections of the
manual with the Raychem representative. Design engineers will obtain design
details from the manual as well as trade coordination and testing requirements,
all of which should be addressed in the project specification to ensure a suc-
cessful snow-melting or anti-icing system.
The general contractor or construction manager should arrange a meeting with
the other trades to discuss installation of the ElectroMelt system prior to the
system installation. At this meeting, each trade should be given the appropriate
section of the manual, and any questions regarding coordination and timing
should be addressed.
The ElectroMelt system performs snow-melting and anti-icing in concrete pavement.
The backbone of the system is the EM2-XR self-regulating heating cable. As the
illustration on the next page indicates, the cable's output is reduced automatically as
the pavement warms, so there is no possibility of failure due to overheating.
Elements of an ElectroMelt system include the EM2-XR heating cable, termination
and splice components, and accessories, such as a junction box, automatic controls,
ground-fault protection device, power contactor, and the tools necessary for a com-
plete installation. This guide provides a data sheet for each element.
Installation of the ElectroMelt System is governed by Article 426 of the National
Electrical Code, which requires the use of a ground-fault protection device (GFPD).
Your installation must also comply with all applicable local codes and standards.
ElectroMelt System
Design Guide
Table of Contents
5
Overview
How to Use This Guide
How to Use the Installation
and Operation Manual
System Description
Codes