®
www.harger.com
®
www.harger.com
This handbook was written to give installers and
inspectors in the field a guide for making high
quality Ultraweld connections.
The tips for using NUWTube
®
and UltraShot
®
have
been developed based on testing done by Harger
as well as many years of experience in the field of
exothermic welding.
If you have any questions about this guide or
any methods or tips described herein, please
don’t hesitate to contact either your Harger
Representative or the experienced technical help
personnel at the Harger main office, 800.842.7437
or www.harger.com.
contents
What is Ultraweld..................................................
2
The Ultraweld Connection ....................................
3
Tips for Making Quality Connections ....................
3
Making an UltraShot Connection ..........................
4
Making a NUWTube Connection .......................... 6
Inspecting an Ultraweld Mold ...............................
8
Inspecting Ultraweld Welds .................................. 9
Troubleshooting Tips ..........................................
14
1
®
www.harger.com
What is Ultraweld
The Ultraweld processes (NUWTube and UltraShot) use
the same, time proven way to connect conductors at
the molecular level. This process involves the reduction
of copper oxide by aluminum which creates Aluminum
Oxide and enough heat to provide molten copper for the
connection.
The reaction is encapsulated by a graphite mold that is
designed for specific conductors. These molds provide a
portable and economical way to make the best electrical
connection.
2
