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6. Electrical work
6.4. Wiring of main power supply and equipment capacity
Schematic Drawing of Wiring: When Not Using a Branch Box (Example) (Fig. 6-5)
A
B
208/230 V AC
60 Hz
Note:
The CITY MULTI series indoor unit cannot receive power
supplied from an outdoor unit, so provide it with power
separately.
Schematic Drawing of Wiring: When Using a Branch Box (Example) (Fig. 6-6)
<When Power Is Supplied from the Outdoor Unit>
A
208/230 V AC, 60 Hz
<When Power Is Supplied Separately>
A
208/230 V AC, 60 Hz
Thickness of Wire for Main Power Supply and On/Off Capacities
<When power is supplied separately>
Model
36/48NAM
Outdoor Unit
36/42/48NAMHZ
60NAM
Branch Box
<When power is supplied from the outdoor unit>
Model
36/48NAM
Outdoor Unit
36/42/48NAMHZ
60NAM
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 3/4 inch.
A
208/230 V AC
GR
60 Hz
B
L1/L2
B1/B2
L1/L2
GR
L1/L2
B
208/230 V AC, 60 Hz
L1/L2
GR
Minimum Wire Thickness
(mm
[AWG])
Power Supply
2
Main Cable*2
Ground
5.3 [AWG10] 5.3 [AWG10]
208/230 V AC,
8.4 [AWG8]
8.4 [AWG8]
60 Hz
8.4 [AWG8]
8.4 [AWG8]
Minimum Wire Thickness
(mm
[AWG])
2
Power Supply
Main Cable*2
Ground
8.4 [AWG8]
8.4 [AWG8]
13.3 [AWG6] 13.3 [AWG6]
208/230 V AC,
60 Hz
13.3 [AWG6] 13.3 [AWG6]
E
E
A Switch (Breakers for Wiring and Current Leakage (if you use))
B Outdoor Unit
Fig. 6-5
C Branch Box
D A-Control indoor unit (M, S, P series indoor unit)
E CITY MULTI series indoor unit
F Pull Box
C
S1/S2/S3
D
S1/S2/S3
D
S1/S2/S3
D
C
S1/S2/S3
D
S1/S2/S3
D
S1/S2/S3
F
A
C
S1/S2/S3
L1/L2
S1/S2/S3
S1/S2/S3
Fig. 6-6
Breaker for
Breaker for Current Leakage
Wiring*1
(if you use)
30 A
30 A 30 mA 0.1 sec. or less
40 A
40 A 30 mA 0.1 sec. or less
40 A
40 A 30 mA 0.1 sec. or less
Refer to installation manual of Branch Box.
Breaker for
Breaker for Current Leakage
Wiring*1
(if you use)
40 A
40 A 30 mA 0.1 sec. or less
45 A
45 A 30 mA 0.1 sec. or less
50 A
50 A 30 mA 0.1 sec. or less
Refer to installation manual of Branch Box.
F
E
E
C
S1/S2/S3
D
D
L1/L2
S1/S2/S3
D
D
S1/S2/S3
D
Minimum circuit
Maximum rating of over
ampacity
current protector device
29 A
40 A
36 A
40 A
36 A
45 A
Minimum circuit
Maximum rating of over
ampacity
current protector device
35 A
50 A
42 A
50 A
46 A
50 A
en
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