Table of Contents
Advertisement
9. ELECTRICAL WORK
9-2. Power cable specifications
Thickness of Wire for Main Power Supply and On/Off Capacities
<When power is supplied separately>
Model
Power Supply
36/48NAM
Outdoor Unit
36/42/48NAMHZ
208/230 VAC,
60 Hz
60NAM
Branch Box
<When power is supplied from the outdoor unit>
Model
Power Supply
36/48NAM
Outdoor Unit
36/42/48NAMHZ
208/230 VAC,
60 Hz
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.
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}
Type 1
PEAD-A·AA, SVZ-A·AA
Type 2
PLA-A·EA7, SEZ-KD·NA
Type 3
SLZ-KF·NA
Type 4
MLZ-KP·NA (2)
Type 5
MFZ-KJ·NA, MSZ-GL·NA, MSZ-FS·NA
Type 6
MSZ-FH·NA, MSZ-FH·NA2, MSZ-EF·NAW (B) (S)-U1
Type 7
Branch box
Type 8
PEFY-P·NMAU-E3, PVFY-P·NAMU
PKFY-P·NHMU, PKFY-P·NKMU, PEFY-P·NMSU, PCFY-P·NKMU,
Type 9
PLFY-EP·NEMU, PLFY-P·NFMU, PMFY-P·NBMU, PKFY-P·NLMU
Type 10
PKFY-P·NBMU, PLFY-P·NCMU
Type 11
PEFY-P·NMHU, PFFY-P·NEMU, PFFY-P·NRMU
Type 12
PEFY-P·NMHSU (connected to MXZ-SM60 only)
Type 13
PEFY-P·NMAU-E4
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)
+ 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-P0855
Minimum Wire Thickness
Breaker for
2
(mm
[AWG])
Wiring*1
Main cable *2
Ground
5.3 [AWG10]
5.3 [AWG10]
30 A
8.4 [AWG8]
8.4 [AWG8]
40 A
8.4 [AWG8]
8.4 [AWG8]
40 A
Minimum Wire Thickness
Breaker for
2
(mm
[AWG])
Wiring*1
Main cable *2
Ground
8.4 [AWG10]
8.4 [AWG10]
40 A
13.3 [AWG8]
13.3 [AWG8]
45 A
13.3 [AWG8]
13.3 [AWG8]
50 A
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
Indoor unit
2
Wire thickness (mm
/AWG)
2.1/14
3.3/12
5.3/10
Breaker for Current Leakage
Minimum circuit ampacity
(if you use)
30A 30mA 0.1sec. or less
40A 30mA 0.1sec. or less
40A 30mA 0.1sec. or less
Refer to installation manual of indoor unit.
Breaker for Current Leakage
Minimum circuit ampacity
(if you use)
40A 30mA 0.1sec. or less
45A 30mA 0.1sec. or less
50A 30mA 0.1sec. or less
Refer to installation manual of indoor unit.
Local switch (A)
Ground-fault interrupter *1
(if you use)
Capacity
15A current sensitivity *3
15
20A current sensitivity *3
20
30A current sensitivity *3
30
V1
V2
26.9
19.8
17.1
2.4
9.9
7.4
6.8
5.1
3.0
38.0
1.6
19.8
2.4
3.5
2.4
0.0
0.0
13.8
4.8
18.6
3.0
+...+
V2 × (Quantity of Type13)
V3
48
56
66
S-Series
Maximum rating of over
current protector device
29 A
40 A
36 A
40 A
36 A
45 A
Maximum rating of over
current protector device
35 A
50 A
42 A
50 A
46 A
50 A
Breaker for wiring (NFB)
Fuse
15
15
20
20
30
30
+...+
{V1 × (Quantity of Type13)/C}
6000
600
SAMPLE
60
10
1
0.1
0.01
1
2
3
4
6
8
10
C
Rated Tripping current (x)
Sample chart
20
35
Hide quick links:
Advertisement
Table of Contents
