5 3.5 and their width corresponds
to the mechanical strength the material,
however not smaller than mm.25 1.4 2.2 0.7 1.4 2.8 0.8 0.6 1.6 1., Group I,
instead Group II).6 0.
Classification insulation materials accord-
ing their tracking resistance based on
their Comparative Tracking Index (CTI) and is
defined Table follows:
This classification applies insulating parts
without ribs grooves.
Accounting for the surrounding air tempera-
ture 40°C (104°F) specified for electrical
equipment, the current-carrying capacity of
rubber-insulated conductors reduced to
82%, based DIN VDE 0298-4:2013-06,
Table and 87% for PVC-insulated con-
ductors for the current-carrying capacity
defined for 30°C (86°F) accordance with
DIN VDE 0298-4:2013-06, Item 4.1 times
higher than the value the table.5 1.8
≤ 160 3.
Conductor Types and Conductor Prepara-
tion
In accordance with 60079-14/DIN VDE
0165-1, the ends stranded and fine-
stranded conductors must protected
against splaying (e.9 3.4
≤ 630 5.4 0.25 1.
These items must fulfill the requirements for
terminal blocks used for external supply con-
ductors.
Table Tracking Resistance for Insulation
Materials
Material
Group
Comparative
Tracking Index
I 600 CTI
II 400 CTI 600
III 175 CTI 400
III 100 CTI 175
Table Minimum Creepage Distances/Clearances and Isolations
Voltage (see a
and b
)
RMS Value for
AC Voltage
V
Minimum Creepage Distance
mm
Minimum Clearance and
Isolations
mm
Material Group
Clearance
mm
Distance
under Coat-
ingd
I III III b
“eb” “ec” “eb” “ec” “eb” “ec” “eb” “ec” “eb” “ec” “ec”
≤ (see c
) 1.2 1.25 1.3 4.5. Termi-
nal blocks with sharp edges which could
damage supply lines and those types that
can rotated, turned permanently
deformed when fixed place are not permit-
ted for use.
According 60069-7/DIN VDE 0170-6,
connecting electrical equipment terminal
blocks having “eb” (increased safety) pro-
tection type must not lead reduction of
the clearances and creepage distances.5 7. Materials that not meet the requirements material
group III can used.2 1.6
≤ 2.1 takes into account that many places circuit the working voltage equal the rated
voltage and that number rated voltages are used, which are covered factor 1.3.6 12.8 3.4 1.2 1.1 2.3
≤ 1.4 0.7 1.8 0.6 1.8
≤ 100 2.7 2. Therefore, further considerations the voltage fluctuations are unnecessary for determining
which voltage value from the table should used.5 1.6 1.3 1.
b)
The specified values for creepage distances and clearances already take into account 10% tolerance for the high-
est supply voltage.6 0.
d)
The specified distances under consideration apply printed circuit boards protection level “ec” after 4.9 1.5 2.6 1.8 1.3 2.3
≤ 1.1 2.9 3.4 2.8 1.g.05 1.8 0.7
≤ 320 6.9
≤ 800 12.5 2.05 1.8 2.3 1.6 1.8 6.4
≤ 500 6.6 2.3.1.3 6.6
≤ 2.5 1.8 0.5 2.1 1.6 1.7 1.8 3.6 1.6 2.6
≤ 2.6 1.5 0.1 2.g.8 0.3 1.1 2.3 1.
NOTE: The factor 1.3
≤ 1.4 1.2 1.8 1.4 2.4
≤ 400 5.
If the insulating parts have ribs grooves
sufficiently large considered, the mini-
mum creepage distances must set
according values for the insulation materi-
als the next-higher level (e.6 1.3
≤ 1.6 0.5 2.7
≤ 250 3.4 0.2 3.
Clearances between conductive parts having
different potentials must least for
external connections, specified Table 2.8 1.6 0.
Based experience through the application
of terminal blocks aggressive atmospheres
in the chemical industry, WAGO recommends
gas-tight tinned copper ferrules tinned
copper pin terminals when connecting fine-
stranded conductors terminal blocks in
corrosive atmospheres.1 0.6 2.05 1.
Soldering alone not sufficient.4 1., via cable lugs fer-
rules) the type terminal blocks used.1 1.8 1.2 1.8
≤ 125 2.25 1.2 2. Terminal blocks for internal con-
nections electrical equipment must not be
subjected excessive mechanical stress.7 0.1 1.
Grooves the surface may only consid-
ered they are least 2.1
≤ 200 2.3
≤ 1.6 1.3 12.2 1.9 1.37
www.8 0.5 6.2 6.3 3.1 1.2 2.
c)
CTI values are not applicable for voltages less.3
≤ 12.5 deep and
wide; ribs the surface only their height is
at least 2.8 0.2 2.8 0.5 4
≤ 1000 5.5 1.2 1.
.9 2.6 1.2 2.1 1.3 3.8
≤ 1250 –
≤ 1600 –
≤ 2000 –
≤ 2500 –
≤ 3200 –
≤ 4000 –
≤ 5000 –
≤ 6300 100 –
≤ 8000 100 110 125 –
≤ 10000 125 140 160 100 100 –
≤ 12500 125 –
≤ 13640 138 –
a)
When determining the required values for creepage distances and clearances, the working voltage may 1.5 2.05 1.wago.6 1.6 1.2 2.com
WAGO Rail-Mount Terminal Block Systems
Technical Information for Applications
It expressly prohibited use insulating
parts for transferring contact forces.8 0.
The value the creepage distances
depends the working voltage, surface
geometry the insulating parts and tracking
resistance the insulation material.7 3.1 1.6 1.1 0.9 0.8 1
