Mitsubishi Electric MXZ-SM36NAM Manuel D'installation page 18

6. Electrical work
Thickness of Wire for Main Power Supply and On/Off Capacities
<When power is supplied separately>
Model
36/48NAM2
Outdoor Unit 36/42/48NAMHZ2
60NAM2
Branch box
Model
36/48NAM2
Outdoor Unit 36/42/48NAMHZ2
60NAM2
Branch box
<When power is supplied from the outdoor unit>
Model
36/48NAM2
Outdoor Unit 36/42/48NAMHZ2
60NAM2
Branch box
Model
36/48NAM2
Outdoor Unit 36/42/48NAMHZ2
60NAM2
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.
Total operating current of the indoor unit
F0 = 15 A or less *
2
F0 = 20 A or less *
2
F0 = 30 A 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}
en
17
Minimum Wire Thickness (mm
Power Supply
Main Cable*
5.3 [AWG10]
8.4 [AWG8]
208/230 V AC, 60 Hz
8.4 [AWG8]
Breaker for Current Leakage Minimum circuit
(if you use)
30 A 30 mA 0.1 sec. or less
40 A 30 mA 0.1 sec. or less
40 A 30 mA 0.1 sec. or less
Refer to Installation Manual of Branch box.
Minimum Wire Thickness (mm
Power Supply
Main Cable*
8.4 [AWG8]
13.3 [AWG6]
208/230 V AC, 60 Hz
13.3 [AWG6]
Breaker for Current Leakage Minimum circuit
(if you use)
40 A 30 mA 0.1 sec. or less
45 A 30 mA 0.1 sec. or less
50 A 30 mA 0.1 sec. or less
Refer to Installation Manual of Branch box.
Minimum wire thickness (mm
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
[AWG])
2
Conduit size
Ground
2
5.3 [AWG10]
8.4 [AWG8]
8.4 [AWG8]
Refer to Installation Manual of Branch box.
Maximum rating of over
ampacity current protector device
36 A 64 A
45 A 80 A
45 A 80 A
[AWG])
2
Conduit size
Ground
2
8.4 [AWG8]
13.3 [AWG6]
13.3 [AWG6]
Refer to Installation Manual of Branch box.
Maximum rating of over
ampacity
current protector device
42 A 70 A
51 A 86 A
55 A 90 A
/AWG)
2 Ground-fault interruper *
(if you use)
15 A current sensitivity *
20 A current sensitivity *
30 A current sensitivity *
Breaker for Wiring*
1
1* 30 A
3
1* 40 A
3
1* 40 A
3
Breaker for Wiring*
1
1* 40 A
3
1 45 A
1 50 A
Local switch (A)
Breaker for wiring
1
Capacity Fuse
15 15
3
20 20
3
30 30
3
(NFB)
15
20
30