Mitsubishi Electric NTXMSM36A142BA Technical & Service Manual page 134

<When power is supplied to outdoor unit and branch box separately>
208/230V AC 60Hz
9-2-2. Cross section area of Wire for Main Power and ON/OFF capacities
Thickness of Wire for Main Power Supply and On/Off Capacities
<When power is supplied separately>
Model
NTXMSM36/48A1 * 2 **
Outdoor Unit NTXMSH36/42/48A1 * 2 **
NTXMSM60A182 **
Branch Box
<When power is supplied from the outdoor unit>
Model
NTXMSM36/48A1 * 2 **
Outdoor Unit NTXMSH36/42/48A1 * 2 **
NTXMSM60A182 **
Branch Box
*1 Please follow applicable federal, state, or local codes to prevent potential leakage/electric shock. Or install a ground fault interrupt for the prevention of leakage and
electric shock.
IMPORTANT
If a current leakage breaker is used, it should be compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2 Use copper supply wires. Use the electric wires over the rating voltage 300 V.
*3 Although the conduit size is larger than the size specified for the wire thickness according to UL standards, use a conduit size of 1 inch.
OCHT810A
B
A
208/230V AC 60Hz
L1/L2
GR
Minimum Wire Thickness
Power Supply
(mm
2
Main Cable *2
5.3 [AWG10] 5.3 [AWG10]
8.4 [AWG8] 8.4 [AWG8]
208/230 VAC,
60 Hz
8.4 [AWG8] 8.4 [AWG8]
Minimum Wire Thickness
Power Supply (mm
2
Main Cable *2
8.4 [AWG8] 8.4 [AWG8]
13.3
208/230 VAC,
[AWG6]
60 Hz
13.3
[AWG6]
F
A
Conduit
Breaker for
[AWG])
size Wiring *1
Ground
1* 30 A
3
1* 40 A
3
1* 40 A
3
Refer to installation manual of Branch Box.
Conduit
Breaker for
[AWG])
size Wiring *1
Ground
1* 40 A
3
13.3 [AWG6] 1 45 A
13.3 [AWG6] 1 50 A
Refer to installation manual of Branch Box.
134
C C
S1/S2/S3
S1/S2/S3
D
;
L1/L2 L1/L2
S1/S2/S3 S1/S2/S3
D
; ;
;
S1/S2/S3 S1/S2/S3
D
;
A Switch (Breakers for Wiring and Current Leakage)
B Outdoor Unit
C Branch Box
D A-Control Indoor Unit
E CITY MULTI series Indoor unit
F Pull Box
Breaker for Current Minimum circuit
Leakage(If you use) ampacity
30 A, 30 mA
36 A
0.1 second or less
40 A, 30 mA
45 A
0.1 second or less
40 A, 30 mA
45 A
0.1 second or less
Breaker for Current Minimum circuit
Leakage(If you use) ampacity
40 A, 30 mA
42 A
0.1 second or less
45 A, 30 mA
51 A
0.1 second or less
50 A, 30 mA
55 A
0.1 second or less
D
;
D
;
;
Maximum rating of over
current protector device
64 A
80 A
80 A
Maximum rating of over
current protector device
70 A
86 A
90 A