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3. Installation
3.8 Installation requirements
Recommended protective devices and cable cross-sections
3.8.3 9PXMEZ11Ki use with 9PX8000 or 9PX11000 UPS
• Separate input source recommended protective devices
For Parallel Operation 
D curve, 125A if use with 9PX11000 UPS
D curve, 100A if use with 9PX8000 UPS
For Redundancy Only 
D curve, 63A if use with 9PX11000 UPS
D curve, 50A if use with 9PX8000 UPS
2 poles circuit breaker
2 poles circuit breaker
• Recommended cable cross-sections:
9PXMEZ11Ki Normal AC source and Bypass AC source
Terminal
position
Wire
function
Terminal wire
size rating
Minimum input
wire size rating
Breaker  
D Curve
Parallel 
Operation  
with 9PX11000 
UPS
L1 Phase
4-35 mm
2
  
(12-4 AWG)
35 mm
2
 (1 AWG)  125A
N 
(L2)
Neutral 
(Phase)
Ground
Parallel 
Operation  
with 9PX8000 
UPS
L1 Phase
4-35 mm
2
  
(12-4 AWG)
25 mm
2
 (2 AWG) 100A
N 
(L2)
Neutral 
(Phase)
Ground
Redundancy  
Only  
with 9PX11000 
UPS
L1 Phase
4-35 mm
2
  
(12-4 AWG)
10 mm
2
 (8 AWG) 63A
N 
(L2)
Neutral 
(Phase)
Ground
Redundancy  
Only  
with 9PX8000 
UPS
L1 Phase
4-35 mm
2
  
(12-4 AWG)
10 mm
2
 (8 AWG) 50A
N 
(L2)
Neutral 
(Phase)
Ground