SPLICING, TERMINATING, AND ACCESSORIES
Theodore A. Balaska and James D. Medek
1.” INTRODUCTION [12-1,12-2,12-3)
A fundamental concept that needs to be established early in this chapter is that
when they are used here a “splice” and “joint” are one and the same! “Cable
Splicers” have been around for about 100 years, but officially in IEEE
Standards, when you join two cable ends together, you make a joint.
The basic dielectric theory that has been previously described for cable in
Chapter 2 also applies to joints and terminations. Some repetition of those
concepts may be presented so that this will be a stand alone treatment and some
repetition is constructive.
This chapter will address the design, application, and prepamtion of cables that
are to be terminated or spliced together. The application of this material will
cover medium voltage cable systems in particular with higher and laver voltage
application being mentioned in particular designs and applications. The field
theory described in Chapter 2 lays the foundation for the theory utilized in the
design and construction of joints and terminations.
2. TERMINATION THEORY
A termination is a way of preparing the end of a cable to provide adequate
electrical and mechanical properties. A discussion of the dielectric field at a
cable termination serves as an excellent introduction to this subject.
Whenever a medium or high voltage cable with an insulation shield is cut, the
end of the cable must be terminated so as to withstand the electrical stress
concentration that is developed when the geometry of the cable has changed.
Previously the electrical stress was described as lines of equal length and
spacing between the conductor shield and the insulation shield. As long as the
cable maintains the same physical dimensions, the electrical stress will remain
consistent. When the cable is cut, the shield ends abruptly and the insulation
changes from that in the cable to air. The concentration of electric sires is now
in the form o