1. Fundamentals for Handling and Connection of Cables and Lines for Fixed Laying

Classification of lines (survey)

Figure

Insulated lines

- Conductors are provided with plastic or rubber insulation (conductor insulation).
- Several conductors are stranded and sheathed by a common insulation (insulation sheath).

Bare lines

- Uninsolated conductors.

Lines for fixed laying (solid system of laying)

- Lines are fixed (permanently installed)

Lines for non-stationary laying (connection to portable equipment)

- Flexible (movable) insulated lines.

Features of lines for fixed laying

- Conductor of lines for fixed laying

- Conductor

· single wire, code designation (e)
· multi-wire, code designation (m)
· round, code designation (r)
· segmental, code designation (s)

- Wire insulation and insulation sheath can be slightly bent. (Bending radius to be considered)

- Line is intended for single laying and subsequent continuous operation (in unchanging position).

What is the difference of lines and cables for fixed laying compared to those for connection of non-stationary (mobile) equipment?
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Examples of applications of cables and lines for fixed laying

Type of line	Indoors			Outdoors	Applications
	dry	humid	wet
Plastic insulated wire	+				Installations, switchgear and distribution systems; light fittings
Plastic cables and plastic-sheathed cables	+	+	+	+	Installations of any kind
Installation wires	+				Concealed installation

Figure 1 Plastic-insulated line, single-insulation, single-wire, (Cu - NY, Al - NAY)

Figure 2 Plastic cable, double-insulation, multi-wire, (Cu - NYY 1 x 50 mm², Al-NAYY 1 x 50 mm²)

Figure 3 Plastic cable, multiple insulation, multi-core, single-wire, (Cu - NYY-I 4 x 2.5 mm² re, Al - NAYY-I 4 x 2.5 mm² re)

Figure 4 Plastic cable, multiple insulation, metal sheath, three-core, multi-wire, Al conductors

What are the criteria for the selection and application of cables and lines for fixed laying?
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Operations required before the connection of the lines

- Bending of lugs
- Pressing-on of cable eyes
- Making pressed joints of conductors
- Soldering on conductors