Siemens 3VA1 100 A Manual page 166

Accessories
4.3 Connection system
Cable classes as defined by IEC 60228:
①
②
③
④
The conductors in class 1 and 2 cables are inflexible conductors, either solid or stranded.
These are used predominantly in applications with low-curvature bending radii and in fixed or
inflexible installations.
The flexible conductors of classes 5 and 6 are suitable for high-curvature cable bending
radii.
The cable conductors used in low-voltage power distribution installations mainly belong to
classes 1, 2, 5 and 6.
Cables with solid conductors in class 1 used for these applications normally have a cross
section of 16 mm² or less.
Please note: Solid-conductor cables in classes 1 and 2 are smaller in diameter than cables
in classes 5 and 6 even when their cross sectional area is the same. As a result, cables with
the same diameter from different classes may have different connection cross sections.
166
Class 1 - cable with solid conductor
Class 2 - cable with stranded conductors
Class 5 - cable with finely stranded conductors
Class 6 - cable with a large number of extra finely stranded conductors
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02