22
IZM32 / IN32 low voltage air circuit breaker
MN013017EN May 2022 www.eaton.com
Section 3: Circuit breaker description and operation
Secondary terminal
AMP secondary
wiring removal tool
3-5 Secondary contacts and connection diagrams
A maximum of 96 secondary wiring connection points are
available, each dedicated to specific functions. The number
of secondary blocks mounted depends on a number of
considerations, such as whether the circuit breaker is
electrically or manually operated and how many features
are required. All necessary customer secondary connection
point are accessible without removing the breaker’s front
cover. Each connection point is permanently identified.
The customer secondary wiring contact point map is
identifiable on the product (Figure 3-10). This is a label
applied to the top of the front cover of the breaker.
General wiring notes:
1. Each secondary terminal block contains four
independent contacts (Figure 3-11) A possible 24
terminal blocks will provide 96 contact points.
2. Drawout circuit breakers use contact blocks that mount
onto an insulated support frame on the cassette.
3. Fixed mounted circuit breakers use contact blocks that
mount onto an insulated support frame. The customer
tension connectors are at an angle.
4. Customer wiring is done using a tension clamp
termination on each contact.
5. Contact blocks are individually mounted and hence
contact positions may be empty depending on
accessories and options ordered.
6. The tension clamp terminals will support solid or flexible
conductors, #12/4 mm
2
through #26 /0 5 mm
2
AWG and
are UL/CSA rated for 600 V, 10 A.
7. The recommended wire strip length is 10-12 mm
(0 39 - 0 47 in).
8. The tension clamp terminals also support finely
stranded conductors with wire-end ferrules and plastic
collars DIN 46228/4, rated connection.
Figure 3-11 Secondary point identification
Figure 3-12 Secondary point identification
Figure 3-13 AMP secondary wiring removal tool
Fixed terminal block
Drawout terminal block
9. The two-point blue plugs house two female crimp
contacts, with the odd assigned numbers having the
coded rib feature on the blue plug.
10. For secondary contacts, odd numbers should be treated
as positive voltage for any accessory. This will not apply
for AC ratings.
Customer wiring details
Type of conductor
Tension
clamp
connection
Recommended strip
length or ferrule
length
Solid cross section
(min - max)
0.5 - 4 mm2
10 - 12 mm
(.39 - .47 in.)
Flexible cross section
(min - max)
0.5 - 4 mm2
10 - 12 mm
(.39 - .47 in.)
American wire gauge -
AWG (min - max)
26 - 12 AWG
10 - 12 mm
(.39 - .47 in.)
Flexible cross-section with
wire end ferrule without
plastic sleeve - DIN
46228/1 (min - max)
0.5 - .2.5 mm2
(26 - 14 AWG)
10 - 12 mm
(.39 - .47 in.)
Flexible cross-section with
wire end ferrule with plastic
sleeve - DIN 46228/4
(min - max)
0.5 - 1.5 mm2
(26 - 16 AWG)
16 - 18 mm
(.63 - .71 in.)
Gauge to IEC 60947-1
A3
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