Hitachi UTOPIA RASC Series Installation And Operation Manual page 40

ELECTRICAL WIRING
13.3.2. WIRE SIZE
Recomended minimum sizes for field provided wires:
•
Model
All Indoor Units(*)
RPI-8/10
RASC-3HVRNE
RASC-5HVRNE
RASC-10HRNE
(*) Except RPI-8/10
- The above wire sizes marked with
Standard, EN60 335-1.
- The above wire sizes marked with
(Flame Retardant Polyflex Wire) manufactured by HITACHI Cable Ltd. Japan.
In case that the power cables are connected in series, add each unit maximum current and select according to the next table:
•
Selection according to
EN60 335-1
Current i (A) Wire Size (mm²) Current i (A) Wire Size (mm²)
I ≤ 6 0.75
6 < i ≤ 10
10 < i ≤ 16 1.5
16 < i ≤ 25 2.5
25 < i ≤ 32
32 < i ≤ 40
40 < i ≤ 63 10
63 < i


In case that current exceeds 63 A do not connect cables in series

NOTE:
- Follow local codes and regulations when selecting field wires, Circuit breakers and Earth Leakage breakers
- Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation H05RN-F)
- The earth cable size must comply with local regulation: IEC 245, no. 571.

CAUTION
- Use shielded wires for transmission between indoor and outdoor units, and connect the shielded part to the earth screw in
the electrical box of the indoor unit as shown below.
Select the main switches in according to the next table:
•
Model Power Source
All Indoor Units (*) 1~230V 50Hz
RPI-8/10 1~230V 50Hz
RASC-3HVRNE
1~230V 50Hz
RASC-5HVRNE
RASC-10HRNE 3N~ 400V 50Hz
ELB: Earth switch; CB: Switch; (*) Except RPI-8/10HP
Power Source Max. Current
5 A
1~ 230V 50Hz
10 A
1~ 230V 50Hz 28 A
1~ 230V 50Hz 37 A
3N~ 400V 50Hz 33 A
are selected by 125% of the maximum current of the unit according to the European

are selected by 125% of the maximum current of the unit according to the wire, MLFC

Selection according to MLFC
(at cable Temp. Of 60 ºC)
I ≤ 15
1 15 < i ≤ 18
18 < i ≤ 24
24 < i ≤ 34
4 34 < i ≤ 47
6 47 < i ≤ 62
62 < i ≤ 78
78 < i ≤ 112
112 < i ≤ 147
Max. Current
5A
10A
28A
37A
33A
Power Source Cable Size
EN60 335-1 MLFC
 
0.75 mm² 0.5 mm²
1.5 mm 0.75 mm²
2
6 mm² 3.5 mm²
10 mm² 5.5 mm²
10 mm² 5.5 mm²
0.5
0.75
1.25
2
3.5
5.5
8
14
22
ELB
CB (no. poles/A/
mA)
6A
10A 2/40/30
40A
50A 2/63/30
40A 4/40/30
Transmitting Cable Size
EN60 335-1 MLFC
 
0.75 mm² 0.5 mm²
PMML0140A rev.1 - 07/2009
40