Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 126

9-2-2. Cross section area of Wire for Main Power and ON/OFF capacities
PUMY-P36NKMU3
PUMY-P36NKMU3-BS
PUMY-HP36NKMU1
Power Supply
Model
P36/48
Outdoor Unit HP36/48
208/230 VAC,
P60
Indoor Unit
*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.
Minimum wire thickness (AWG [mm2]) Ground-fault interrupter
Total operating current
of the indoor unit
Main Cable
*2
F0 = 15 A or less 14/2.1
*2
F0 = 20 A or less 12/3.3
*2
F0 = 30 A or less 10/5.5
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}
Indoor unit
Type 1 PEFY-P·NMAU, PVFY-P·NAMU
PKFY-P·NHMU, PKFY-P·NKMU, PEFY-P·NMSU,
Type 2 PCFY-P·NKMU, PLFY-EP·NEMU,
PLFY-P·NFMU, PMFY-P·NBMU, PKFY-P·NLMU
Type 3 PKFY-P·NBMU, PLFY-P·NCMU
Type 4 PEFY-P·NMHU, PFFY-P·NEMU, PFFY-P·NRMU
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 Type4) + V3 × (Wire length [km])
G1
30 or less
100 or less
Wire thickness (AWG [mm2])
14/2.1
12/3.3
10/5.3
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 line longer than power cables.
OCH733
PUMY-P48NKMU3
PUMY-P48NKMU3-BS
PUMY-HP48NKMU1
Minimum Wire Thickness
(AWG [mm2])
*2
Main Cable Ground
AWG10 [5.3] AWG10 [5.3] 3/4 inch
AWG8 [8.4] AWG8 [8.4]
60 Hz
AWG8 [8.4] AWG8 [8.4]
Branch Ground
14/2.1 14/2.1
12/3.3 12/3.3
10/5.5 10/5.3
Current sensitivity
30 mA 0.1 second or less
100 mA 0.1 second or less
V3
48
56
66
PUMY-P60NKMU3
PUMY-P60NKMU3-BS
Conduit Breaker for Breaker for Current
*1
Size Wiring Leakage(If you use)
*3
30 A
0.1 second or less
3/4 inch 40 A
0.1 second or less
3/4 inch 40 A
0.1 second or less
Refer to installation manual of indoor unit.
*1
(If you use)
*3
15 A current sensitivity
*3
20 A current sensitivity
*3
30 A current sensitivity
V1 V2
38.0 1.6
19.8 2.4
3.5 2.4
0.0 0.0
126
Minimum circuit
ampacity
30 A, 30 mA
29 A
40 A, 30 mA
36 A
40 A, 30 mA
36 A
Local switch (A) Breaker for wiring
Capacity Fuse
15 15
20 20
30 30
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6 8 10
C
Rated Tripping current (x)
Maximum rating
of over current
protector device
44 A
44 A
45 A
(NFB)
15
20
30
20