Eaton IZM32 Instruction Manual page 18

Section 2: Receiving, handling, and installation
Electrical clearance
The following information about electrical clearance is
intended to provide a guideline for the installation of fixed
type or drawout type circuit breakers in an enclosure. The
diagram and related dimensions can be used for reference.
Electrical clearance dimension (mm)
Recommended enclosure clearance and
ventilation
Breaker Enclosure To insulated
type clearance surface
Withdrawable A 0
B 25
Fixed A 150
B 30
Recommended safety clearances
100
The typical enclosure drawing and dimension table is
intended as a guideline for designing a circuit breaker
enclosure. The enclosure dimensions and required
ventilation openings should be considered at the designing
phase.
Recommended enclosure/ventilation opening
dimensions
Width
W
Height
H
Depth
D
Ventilation holes
V
14 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
To grounded With cell
metal surface switch or
locking
facilities
0 0
25 25/75
250 -
70 -
A A
B
Ventilation openings
(do not cover!)
Width of cassette + 75 mm
550 mm
450 mm (front control panel bay)
320 cm² (4000-6300A)
Cell switch
(optional)
B
Locking facilities
(optional)
W
H
D
Top or rear vent
V
V
Rear or lower vent