Recommended Cable Sizes for IEC
DANGER 

hazard of electric shock, explosion, or arc flash
Failure to follow these instructions will result in death or serious injury.

The maximum number of cable connections per busbar:

4 on input/output/bypass busbars

4 x 240 mm^{2} or 8 x 150 mm^{2} on DC+/DC busbars

8 on N busbar

16 on PE busbar
Cable sizes in this manual are based on the minimum requirements in table B.52.3 and table B.52.5 of IEC 60364552 with the following assertions:

90 °C conductors

An ambient temperature of 30 °C

Use of copper or aluminum conductors

Installation method C
PE cable size is based on table 54.2 of IEC 60364454.
If the ambient temperature is greater than 30 °C, larger conductors are to be selected in accordance with the correction factors of the IEC.
Copper
UPS rating  200 kW  250 kW  300 kW  350 kW  

Voltage (V)  380  400  415  440  380  400  415  440  380  400  415  440  380  400  415  440 
Input phases (mm^{2})  1 x 185  1 x 185  1 x 150  1 x 150  2 x 120  2 x 120  2 x 120  1 x 240  2 x 150  2 x 150  2 x 150  2 x 120  2 x 185  2 x 185  2 x 150  2 x 150 
Input PE (mm^{2})  1 x 95  1 x 95  1 x 95  1 x 95  1 x 120  1 x 120  1 x 120  1 x 120  1 x 150  1 x 150  1 x 150  1 x 120  1 x 185  1 x 185  1 x 150  1 x 150 
Bypass/output phases (mm^{2})  1 x 120  1 x 120  1 x 120  1 x 120  1 x 185  1 x 185  1 x 150  1 x 150  2 x 120  1 x 240  1 x 240  1 x 185  2 x 150  2 x 150  2 x 120  2 x 120 
Bypass PE/output PE (mm^{2})  1 x 70  1 x 70  1 x 70  1 x 70  1 x 95  1 x 95  1 x 95  1 x 95  1 x 120  1 x 120  1 x 120  1 x 95  1 x 150  1 x 150  1 x 120  1 x 120 
Neutral (mm^{2})  1 x 120  1 x 120  1 x 120  1 x 120  1 x 185  1 x 185  1 x 150  1 x 150  2 x 120  1 x 240  1 x 240  1 x 185  2 x 150  2 x 150  2 x 120  2 x 120 
DC+/DC (mm^{2})  1 x 240  2 x 150  2 x 185  2 x 240  
DC PE (mm^{2})  1 x 120  1 x 150  1 x 185  1 x 240 
Copper
UPS rating  400 kW  450 kW  500 kW  

Voltage (V)  380  400  415  440  380  400  415  440  380  400  415  440 
Input phases (mm^{2})  2 x 240  2 x 240  2 x 185  2 x 185  3 x 185  3 x 185  3 x 185  2 x 240  3 x 185  3 x 185  3 x 185  3 x 185 
Input PE (mm^{2})  1 x 240  1 x 240  1 x 185  1 x 185  2 x 150  2 x 150  2 x 150  1 x 240  2 x 150  2 x 150  2 x 150  2 x 150 
Bypass/output phases (mm^{2})  2 x 150  2 x 150  2 x 150  2 x 150  2 x 185  2 x 185  2 x 185  2 x 150  2 x 240  2 x 240  2 x 185  2 x 185 
Bypass PE/output PE (mm^{2})  1 x 150  1 x 150  1 x 150  1 x 150  1 x 185  1 x 185  1 x 185  1 x 150  1 x 240  1 x 240  1 x 185  1 x 185 
Neutral (mm^{2})  2 x 150  2 x 150  2 x 150  2 x 150  2 x 185  2 x 185  2 x 185  2 x 150  2 x 240  2 x 240  2 x 185  2 x 185 
DC+/DC (mm^{2})  3 x 185  3 x 240  3 x 240  
DC PE (mm^{2})  2 x 150  2 x 185  2 x 185 
Aluminum
UPS rating  200 kW  250 kW  300 kW  350 kW  

Voltage (V)  380  400  415  440  380  400  415  440  380  400  415  440  380  400  415  440 
Input phases (mm^{2})  1 x 240  1 x 240  1 x 240  1 x 240  2 x 185  2 x 185  2 x 185  2 x 150  2 x 240  2 x 240  2 x 240  2 x 185  2 x 240  2 x 240  2 x 240  2 x 240 
Input PE (mm^{2})  1 x 120  1 x 120  1 x 120  1 x 120  1 x 185  1 x 185  1 x 185  1 x 150  1 x 240  1 x 240  1 x 240  1 x 185  1 x 240  1 x 240  1 x 240  1 x 240 
Bypass/output phases (mm^{2})  1 x 185  1 x 185  1 x 185  1 x 150  2 x 120  1 x 240  1 x 240  1 x 240  2 x 185  2 x 150  2 x 150  2 x 120  2 x 240  2 x 240  2 x 185  2 x 185 
Bypass PE/output PE (mm^{2})  1 x 95  1 x 95  1 x 95  1 x 95  1 x 120  1 x 120  1 x 120  1 x 120  1 x 185  1 x 150  1 x 150  1 x 120  1 x 240  1 x 240  1 x 185  1 x 185 
Neutral (mm^{2})  1 x 185  1 x 185  1 x 185  1 x 150  2 x 120  1 x 240  1 x 240  1 x 240  2 x 185  2 x 150  2 x 150  2 x 120  2 x 240  2 x 240  2 x 185  2 x 185 
DC+/DC (mm^{2})  2 x 150  2 x 240  3 x 185  3 x 240  
DC PE (mm^{2})  1 x 150  1 x 240  2 x 150  2 x 185 
Aluminum
UPS rating  400 kW  450 kW  500 kW  

Voltage (V)  380  400  415  440  380  400  415  440  380  400  415  440 
Input phases (mm^{2})  3 x 185  3 x 185  3 x 185  3 x 185  3 x 240  3 x 240  3 x 240  3 x 185  4 x 185  4 x 185  3 x 240  3 x 240 
Input PE (mm^{2})  2 x 150  2 x 150  2 x 150  2 x 150  2 x 185  2 x 185  2 x 185  2 x 150  2 x 185  2 x 185  2 x 185  2 x 185 
Bypass/output phases (mm^{2})  2 x 240  2 x 240  2 x 240  2 x 240  3 x 185  3 x 185  2 x 240  2 x 240  3 x 240  3 x 185  3 x 185  3 x 185 
Bypass PE/output PE (mm^{2})  1 x 240  1 x 240  1 x 240  1 x 240  2 x 150  2 x 150  1 x 240  1 x 240  2 x 185  2 x 150  2 x 150  2 x 150 
Neutral (mm^{2})  2 x 240  2 x 240  2 x 240  2 x 240  3 x 185  3 x 185  2 x 240  2 x 240  3 x 240  3 x 185  3 x 185  3 x 185 
DC+/DC (mm^{2})  4 x 185  4 x 240  —  
DC PE (mm^{2})  2 x 185  2 x 240  3 x 240 
Guidance for Organizing Input, Bypass, And Output Cables
NOTICE 

Risk of equipment damage
To ensure correct load sharing in bypass operation in a parallel system:
Failure to follow these instructions can result in equipment damage.

The input, bypass, and output cables must be grouped in circuits. On raceways, use one of the two shown cable formations.