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Mitsubishi Electric SMART MULTI MXZ-SM36NAM2-U1 Data Book page 52

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9. ELECTRICAL WORK
Thickness of Wire for Main Power Supply and On/O Capacities
<When power is supplied separately>
Power Supply
Model
MXZ-SM72TAM
Outdoor Unit
MXZ-SM96TAM
208/230 V AC,
MXZ-SM120TAM
B
a r
n
c
h
B
o
x
<When power is supplied from the outdoor unit>
Power Supply
Model
MXZ-SM72TAM
Outdoor Unit
MXZ-SM96TAM
208/230 V AC,
MXZ-SM120TAM
B
a r
n
c
h
B
o
x
*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.
Total operating current of the indoor unit
F0 = 15 or less *2
F0 = 20 or less *2
F0 = 30 or less *2
Apply to IEC61000-3-3 about max. permissive system impedance.
*1 The Ground-fault interrupter should support inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.2
F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Type4)/C} +...+ {V1 × (Quantity of Type12)/C}
T
y
p
e
1
P
E
A
D
A -
A ·
, A
S
V
Z
K -
· P
N
T
y
p
e
2
P
L
A
A -
E ·
, A
S
E
Z
K -
D
·
N
A
T
y
p
e
3
S
L
Z
K -
· F
N
A
T
y
p
e
4
M
L
Z
K -
· P
N
A
(
) 2
Type 5
MFZ-KJ·NA, MSZ-GL·NA, MSZ-GS·NA, MSZ-FS·NA
Type 6
MSZ-FH·NA, MSZ-FH·NA2, MSZ-EF·NAW(B)(S)-U1
T
y
p
e
7
B
a r
n
c
h
b
o
x
T
y
p
e
8
P
E
F
- Y
· P
N
M
A
U
E -
, 3
P
V
PKFY-P·NKMU, PEFY-P·NMSU, PCFY-P·NKMU, PLFY-EP·NEMU,
Type 9
PLFY-P·NFMU, PMFY-P·NBMU, PKFY-P·NLMU
T
y
p
e
1
0
P
E
F
- Y
· P
N
M
H
, U
P
F
F
- Y
T
y
p
e
1
1
P
E
F
- Y
· P
N
M
H
S
U
T
y
p
e
1
2
P
E
F
- Y
· P
N
M
A
U
E -
4
C: Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
* Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)
F2 = 19.8 × 4/8 + 38 × 1/8
= 14.65
→16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) +...+ V2 × (Quantity of Type12)
+ V3 × (Wire length [km])
G1
Current sensitivity
30 or less
30 mA 0.1sec or less
100 or less
100 mA 0.1sec or less
1. Use a separate power supply for the outdoor unit and indoor unit.
2. Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.
Make sure the power-supply voltage does not drop more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 60245 IEC57). For example, use wiring such
as YZW.
6. Install an earth longer than other cables.
M-P0890
Minimum Wire Thickness
(mm
2
[AWG])
Main Cable*2
Ground
8.4 [AWG8]
8.4 [AWG8]
8.4 [AWG8]
8.4 [AWG8]
60 Hz
13.3 [AWG6] 13.3 [AWG6] 1-1/4*3
Minimum Wire Thickness
2
(mm
[AWG])
Main Cable*2
Ground
21.2 [AWG4] 21.2 [AWG4]
21.2 [AWG4] 21.2 [AWG4]
60 Hz
21.2 [AWG4] 21.2 [AWG4]
2
Minimum Wire Thickness (mm
[AWG])
Main cable
Branch
Ground
2.1/14
2.1/14
2.1/14
3.3/12
3.3/12
3.3/12
5.3/10
5.3/10
5.3/10
n I
d
o
r o
u
n
t i
A
F
- Y
· P
N
A
M
U
· P
N
E
M
, U
P
F
F
- Y
· P
N
R
M
U
Wire thickness (mm
2.1/14
3.3/12
5.3/10
Conduit
Breaker for
Breaker for Current Leakage
size
Wiring*1
(if you use)
1-1/4*3
40 A
40 A 30 mA 0.1 sec. or less
1-1/4*3
40 A
40 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.
Conduit
Breaker for
Breaker for Current Leakage
size
Wiring*1
(if you use)
1-1/4
60 A
60 A 30 mA 0.1 sec. or less
1-1/4
60 A
60 A 30 mA 0.1 sec. or less
1-1/4
70 A
70 A 30 mA 0.1 sec. or less
Refer to installation manual of Branch Box.
Ground-fault interrupter *1
(if you use)
15A current sensitivity *3
20A current sensitivity *3
30A current sensitivity *3
V
1
V
2
2
6
9 .
1
9
8 .
1
7
1 .
2.4
9
9 .
7.4
6.8
5
1 .
3
0 .
3
8
0 .
1
6 .
19.8
2.4
0
0 .
0
0 .
1
3
8 .
4
8 .
1
8
6 .
3
0 .
2
/AWG)
V3
48
56
66
Minimum circuit
Maximum rating of over
ampacity
current protector device
32 A
32 A
47 A
Minimum circuit
Maximum rating of over
ampacity
current protector device
50 A
50 A
65 A
Local switch (A)
Breaker for wiring (NFB)
Capacity
Fuse
15
15
20
20
30
30
6000
600
60
10
1
0.1
0.01
1
2
3
4
Rated Tripping current (x)
Sample chart
SMART MULTI
58 A
58 A
84 A
76 A
76 A
102 A
15
20
30
SAMPLE
6
8
10
20
C
50
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