9.6.4 Safety device requirement
1. Select the wire diameters( minimum valve) individually for each unit based on the table 9-1 and table 9-2, where the rated
current in table 9-1 means MCA in table 9-2. In case the MCA exceeds 63A, the wire diameters should be selected according
to the national wiring regulation.
2. Maximum allowable voltage range variation between phases is 2%.
3. Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection,where MFA
is used to select the current circuit breakers and residual current operation breakers.
Table 9-1
Rated current
Nominal cross-sectional area (mm )
of appliance:(A)
Flexible cords
3
0.5 and 0.75
≤
3
and
6
0.75 and 1
>
≤
6
and
10
1
>
≤
10 and
16
1.5 and 2.5
>
≤
16 and
25
2.5 and 4
>
≤
25 and
32
4
>
≤
32 and
50
6
>
≤
50 and
63
10
>
≤
Table 9-2
1-phase 5-16kW standard and 3-phase 12-16kW standard
Outdoor Unit
System
Voltage
Hz
Min.
(V)
(V)
6
220-240
50
198
8
220-240
50
198
10
220-240
50
198
220-240
50
198
12
220-240
50
198
14
220-240
50
198
16
380-415
50
342
12T
380-415
50
342
14T
380-415
50
342
16T
MCA : Minimum. Circuit Amps. (A)
TOCA : Total Over-current Amps. (A)
MFA : Max. Fuse Amps. (A)
MSC : Max. Starting Amps. (A)
RLA : In nominal cooling or heating test condition,the input Amps of compressor where MAX. Hz
can operate Rated Load Amps. (A)
kW : Rated Motor Output
FLA : Full Load Amps. (A)
2
Cable for fixed wiring
1
and 2.5
1
and 2.5
and 1.5
1
and 2.5
1.5 and 4
2.5 and 6
and 6
4
and 10
and 10
6
and 16
and 16
10 and 25
Pow er Current
Compressor
Max.
MCA
TOCA
MFA
MSC
(V)
(A)
(A)
(A)
(A)
-
264
13
18
25
-
264
14.5
18
25
-
264
18
25
16
-
264
25
30
40
-
264
26.5
30
40
-
264
28
30
40
-
456
9.5
14
16
-
456
10.5
14
16
-
456
11.5
14
16
NOTE
OFM
RLA
kW
FLA
(A)
(A)
10.50
0.17
1.50
0.17
10.50
1.50
0.17
10.50
1.50
0.17
17.00
1.50
0.17
17.00
1.50
0.17
17.00
1.50
0.17
16.00
0.70
16.00
0.17
0.70
16.00
0.17
0.70
33