Accessories
4.3 Connection system
3VA molded case circuit breakers with IEC certificate
212 Manual, 03/2019, A5E03603177010-03
The conductors in class 1 and 2 cables are inflexible conductors, either solid or stranded.
These are used predominantly in applications with low-curvature cable bending radii and in
fixed or inflexible installations.
Flexible conductors of class 5 and class 6 permit greater 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.
Solid and stranded sector-shaped conductors are also used.
Compression lugs and wire-end ferrules
Cables are connected by means of compression lugs and wire-end ferrules to the molded
case circuit breaker in order to provide stable, safe connections. These elements help to
make solid connections at the breaker.
The cable is first stripped over the distance L before the compression lug or wire-end ferrule
is attached to the cable.
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