Siemens SENTRON 3VL System Manual page 89

Minimum clearance between two horizontally or vertically installed circuit breakers.
Ensure the busbar or cable connection does not reduce the air insulation distance. The
permissible clearance between two circuit breakers applies for both fixed-mounted and plug-
in versions. Some accessories may increase the width of the circuit breaker.
Figure 7-4
The clearance between the terminal and the grounded metal must be G ≥ 12 mm.
If the clearance to ground G is < 12 mm, live parts must be insulated or a suitable barrier
must be installed.
CAUTION
Depending on the application, appropriate air and creepage distances must be observed,
e.g. IEC 60439-1.
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
Minimum clearance between the circuit breaker and metal
Installing/mounting
7.2 Mounting and safety clearances
89