Technical data, 451 series terminal blocks – GE Industrial Solutions 451 Series Terminal Blocks User Manual
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TECHNICAL DATA
451 Series Terminal Blocks
Thread diameter (mm)
Tightening torque (lb-ft)*
Metric standard values
Diametrical range
I
II
III
2.5
≤
2.8
0.15
0.30
0.30
3.0
> 2.8 through 3.0
0.18
0.37
0.37
—
> 3.0 through 3.2
0.22
0.44
0.44
3.5
> 3.2 through 3.6
0.30
0.59
0.59
4
> 3.6 through 4.1
0.52
0.89
0.89
4.5
> 4.1 through 4.7
0.59
1.33
1.33
5
> 4.7 through 5.3
0.59
1.48
1.48
6
> 5.3 through 6.0
0.89
1.84
2.21
8
> 6.0 through 8.0
1.84
2.58
4.43
10
> 8.0 through 10.0
—
2.95
7.38
12
> 10.0 through 12.0
—
—
10.3
14
> 12 through 15
—
—
14.0
16
> 15 through 20
—
—
18.4
20
> 20 through 24
—
—
26.6
24
> 24
—
—
36.9
Standard Cross Sections of
Round Copper Conductors
Design and Dimensions of Fine Stranded and Solid Copper Conductors
Excerpt from DIN VDE 0295 (06.92)
Torque
Excerpt from EN 60 947: Tightening torques for verification of mechanical stability of screw connections
Metric size ISO mm
2
AWG
mm
2
1.5
16
1.3
2.5
14
2.1
4
12
3.3
6
10
5.3
10
8
8.4
16
6
13.3
25
4
21.2
35
2
33.6
50
(1/0) 0
53.5
70
(2/0) 00
67.4
Nominal cross-
section (mm
2
)
Fine Stranded
Stranded
Solid
Diameter
max. size
No. of wires
Diameter
max. size
No. of wires
Diameter
max. size
No. of wires
(guide value)
1.5
1.8
1
–
–
1.5
1
2.5
2.3
1
–
–
1.9
1
4
2.9
1
–
–
2.4
1
6
3.9
1
–
–
2.9
1
10
5.1
1
4.2
7
3.7
1
16
6.3
1
5.3
7
4.6
1
25
7.8
–
6.6
7
–
–
35
9.2
–
7.9
7
–
–
50
11
–
9.1
19
–
–
70
13.1
–
11
19
–
–
Current Carrying Capacity of Cables or Wires
Recommended values for the current carrying capacity of cables or wires for fixed installation and external mounting have been taken from DIN VDE 0298 part
4/11.98 together with the modifications in draft DIN VDE 0298 part 4 A1/03.00 and are contained in supplement 1 to DIN VDE 0100 part 430, converted at 25 °C.
Current Carrying Capacity of DIN Rail Terminal Blocks
This table applies to DIN rail terminal blocks and copper conductors: Test currents according to
DIN EN 60 947-7-1/VDE 0611 part 1: 2000-05
The rated cross section of a DIN rail terminal block is the value indicated by the manufacturer of the
connectable conductor cross section to which specific thermal, mechanical and electrical requirements refer.
The rated connecting capacity of a DIN rail terminal block is a range and/or a number of rated cross sections
that the terminal block is intended for. It should be indicated for each terminal block separately. The conductors
can be rigid (solid or stranded) or flexible. The data pertains to unprepared conductor ends without ferrules and
includes the largest and smallest connectable conductor cross sections. In general it is possible to connect two
conductors with the same cross section and design.
For DIN rail terminal blocks with special functions, the rated current from the manufacturer has been determined according to the requirements of the special
functions. Special functions can be given by pluggable connections, isolating points, fuses, relays or electronic components. The current carrying capacity of
other terminal blocks has been fixed and assessed following the above specifications according to EN 60 999/VDE 0609 part 1 or EN 60 998-1/VDE 0613 part
1 or EN 60 335-1/DIN VDE 0700 part 1, as far as they are relevant.
Rated cross-section mm
2
Test current A
1.5
17.5
2.5
24
4
32
6
41
10
57
16
76
25
101
35
125
50
150
70
192
* I = Headless screws that do not protrude from the threaded hole and that are driven by screwdrivers with tips smaller than the
screws’ thread core diameter.
II = Nuts and screws that are tightened with a screwdriver.
III = Nuts and screws that can be tightened with tools other than a screwdriver