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close this bookHandling and Connection of Cables and Lines for Fixed Laying - Course: Basic skills and knowledge of electrical engineering. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 17 p.)
View the document(introduction...)
View the documentIntroduction
View the document1. Fundamentals for Handling and Connection of Cables and Lines for Fixed Laying
View the document2. Handling of Cables and Lines for Fixed Laying
close this folder3. Connection of Cables and Lines for Fixed Laying to Electrical Equipment
View the document(introduction...)
View the document3.1. Making Screw Joints
View the document3.2. Criteria for Clamped Joints in Electrical Installations
View the document3.3. Pressed Joints
View the document3.4. Making Wire-wrap Joints
View the document3.5. Making Soldered Joints

2. Handling of Cables and Lines for Fixed Laying

The insulation can be removed by means of the following tools:

- cable stripper
- sheath stripper
- insulation stripping plier

Stripping process for a plastic-sheathed cable

Stripping of the insulation sheath

By means of the cable stripper

- Apply cable stripper angularly.

- Rip up the insulation sheath of the cable parallel to the conductor. (The knife is to be held at such an angle to the conductor that the knife blade cannot damage the conductor insulation).

- Tear apart the plastic sheath.

- Carefully cut off the insulation sheath all around.


Figure 5 Stripping of the insulation sheath by means of cable stripper

For stripping of insulation use knife with sharp blade only!

By means of the sheath stripper

- Set adjustable blade according to the line diameter.
- Put the stripper on the line.
- Rip up the sheath.
- Tear apart the plastic sheath.
- Carefully cut off the insulation sheath all around.


Figure 6 Sheath stripper for removing the insulation sheath from plastic-sheathed cables

1 blade, 2 area for the cable, 3 adjustable blade for scoring the insulation sheath, 4 handle, 5 adjusting screw for setting the blade, 6 cable

Removal of the filler

- Completely remove the filling material under the sheath up to the insulation from the stripped end of the cable.

Removal of the conductor insulation

By means of the cable stripper

- Cut off (peel off) one half of the insulation by means of the knife.
- Pull off the other half by hand and cut off by means of the knife.


Figure 7 Stripping of the conductor insulation by means of the cable stripper

Make sure that the knife is guided correctly since the conductor may be damaged by wrong knife guidance and may break when being bent.

What are the risks involved in a conductor which has been damaged when stripping the conductor insulation?
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By means of the insulation stripping plier

- Set adjustable stripping blades according to the cross section of the conductor.
- Put conductor into the pair of noses of the stripping plier and operate the stripping plier.


Figure 8 Stripping of the conductor insulation by means of an insulation stripping plier

Only use the cutting edge suitable and marked for the relevant conductor cross-section. Conductor cross-sections exceeding 6 mm2 are to be stripped by means of the cable stripper!

For bending of wire lugs and pressing-on of cable eyelets see “Trainees’ Handbook of Lessons” of Making Fastening Joints” and “Making Permanent Joints”.

What is to be considered for bending of wire lugs?
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What is to be considered for making a joint with wire lugs?
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What is to be considered for pressing-on cable eyelets?
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