EVPoint EV22 Series - Electrical Wiring and Breaker Requirements

page 13 of 49
1.2.4. Electrical wiring and breaker requirements
1.2.4.1. Calculating circuit voltage drop and sizing circuit wiring and breaker
In order for the charger to provide full charging power, it must be supplied through a dedicated
circuit capable of handling the full 32A of current per phase with less than 10 VAC voltage
drop. The circuit’s nominal rating should be no less than 40A. The circuits can be implemented
with solid or stranded copper wire, or copper-clad aluminum wire. Stranded conductors shall be
connected to the device only after a ferrule is installed.
Installed length, m
Voltage drop in copper conductor at 40A, VAC
Area, mm
2
4*
6**
10
16
5
1.7
1.2
0.7
0.4
10
3.4
2.3
1.4
0.9
15
5.2
3.5
2.0
1.3
20
6.9
4.6
2.7
1.8
25
8.6
5.8
3.4
2.2
30
10.3
7.0
4.1
2.6
35
12.0
8.1
4.8
3.1
Note: Shaded areas indicate excessive voltage drop
*recommended minimal conductor area for 16A charging
** recommended minimal conductor area for 32A charging
Installed length, m
Voltage drop in aluminium conductor at 40A, VAC
Area, mm
2
4
6*
10**
16
5
2.6
1.8
1.1
0.7
10
5.3
3.5
2.2
1.4
15
7.9
5.3
3.2
2.0
20
10.6
7.0
4.3
2.7
25
13.2
8.8
5.4
3.4
30
15.8
10.6
6.5
4.1
35
18.5
12.3
7.6
4.8
Note: Shaded areas indicate excessive voltage drop
*recommended minimal conductor area for 16A charging
** recommended minimal conductor area for 32A charging
Ferrule installation for stranded power conductors