Siemens SIMOTICS GP Operating Instructions Manual page 79

Cooling and Air Guidance:
INCORRECT RIGHT
Minimum dimension X=5" for the distance between neighboring modules
and the air intake of the motor.
CAUTION:
All wiring to the motor, size of the conductors, drivers,
protection devices, motor starters, grounding devices and any other
electrical equipment must be in accordance with NOM-001-SEDE, NEC and
the National Electrical Code and all local regulations.
Unrestricted 79 A5E43486667A_AB