Lesson 2 Cable Splicing And Tools Flashcards
There are ? shapes of stranded conductors most commonly used in cable
5
What are the 5 shapes of stranded Conductor?
An annular conductor is a solid conductor laid around a suitable core. The core is usually made of conducting materials.
False
The advantages of using a compact round conductor instead of a concentric round conductor is that the compact conductor has a smaller outside diameter and the cable will ? than the concentric round.
Weigh less
The three main categories of cable insulation include ? .
Thermosetting
Thermoplastic
Laminated
One advantage of impregnated paper insulation is that it has good frequency stability.
True
Another advantage of impregnated paper insulation is that it has good electrical properties such as high dielectric strength, low power factor, and low ? .
Dielectric loss
The ratio of capacitance is the ability of material to hold a charge compared to the capacitance of ? .
Air
The ? is the ratio of capacitance on two conducting surfaces with air as the dielectric insulating material used between the surfaces.
Dielectric constant
There are ? types of extruded insulation used in cable manufacturing.
8
Cross-linked polyethylene insulation has a superior resistance to heat deformation and environmental stress cracking.
True
The tape used for the insulation of metallic shield can also be used as a ground to carry a potential fault current.
False
The purpose of the metallic shield is to ? inside the cable.
Contain and equalize the electric field
The electrical grounding braid used to ground a splice or termination has a high current carrying capacity equal to that of a ? wire.
6 AWG
The purpose of the ? is to provide mechanical protection and, in some cases, electrical protection and a path for current return.
Cable Jacketing
The advantage of using lead sheathing is that it is the most effective protection for insulation against moisture, weather, and ? .
Oxidation
The cable cleaning kit used to clean the insulation of the solid dielectric cable will help to prevent tracking on the insulation and also leaves a tacky surface to help secure the semi-conductor tape, which is applied on the insulation after it has been cleaned.
False
Calipers used in cable splicing measure the ? thickness.
Insulation
A knife is a tool frequently used by a cable splicer. One job that can be performed with a knife is cutting and penciling the insulation.
True
The cable metallic shielding can be soldered using an electric soldering iron, soldering tips, or a ? soldering iron.
Propane
Always use a lead pencil when marking cable because the lead in a lead pencil is very conductive and will help to make a better splice.
False
A small ? can be used in preparing a cable end because it will allow the worker to make a straight cut on the insulation and he or she can control how deep the blade is cutting.
Tubing cutter
To ring cut the cable insulation and help to prevent damaging the cable conductor, use a piece of ? .
Cotton string
When using a torch for shrinking a heat shrink termination or splice, the flame should be adjusted to provide an overall ? bushy flame. Use the yellow tip for shrinking.
12”
