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Wiring
2.1
Rules for Wiring
Warning
Dangerous high voltage! Take care to avoid electric shock and injuries from
burns. Always deenergize the system and the device before carrying out any
work.
Selecting the motor connecting cables
The core cross section of the motor connecting cables must match the given
environmental conditions. The cross section is governed by:
• the nominal current set on the unit,
• the method of cable laying,
• the ambient temperature,
• the insulation material of the motor connecting cable (PVC, rubber).
For PVC motor connecting cables laid in cable ducts, the following maximum
current carrying capacities apply according to environment temperature:
T
=
env
4 x 1.5 mm
4 x 2.5 mm
4 x 4.0 mm
Wiring power connectors
The rules and procedure for wiring the power connectors apply both to the
electromechanical (
EDS/ERS). Observe the following rules when wiring the power plug:
Current carrying capacity of the connection depending on the
connected core cross-section and the environment tempera-
ture
Permissible outside diameter of cable
Sealing insert
Bared length of cores
Bared length of cable sheath
2-2
30 °C
2
14 A
12.2 A
2
19 A
16.5 A
2
26 A
22.6 A
EM 300 DS/RS
Rules for flexible conductors
40 °C
45 °C
11.1 A
15.0 A
20.5 A
) and the electronic motor starter
2
1.5 mm
2
2.5 mm
2
4.0 mm
green
red
white
SIMATIC - EM 300 Motor Starters
50 °C
55 °C
9.9 A
8.5 A
13.5 A
11.6 A
18.5 A
15.9 A
(EM 300
Data
at T
env
55 °C
40 °C
12 A
15 A
20 A
25 A
30 A
35 A
7.0 ... 10.5 mm
9.0 ... 13.0 mm
11.5 ... 15.5 mm
8 mm
20 mm
GWA-4NEB 640070302-05
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