Table of Contents
10. ELECTRICAL WORK
10-3. Power cable specifications
Thickness of wire for main power supply, capacities of the switch and system impedance
3-phase 3-wire, 208/230V, 60Hz
HP72
PURY-HP-TNU-A
HP96
HP120
3-phase 3-wire, 460V, 60Hz
HP72
PURY-HP-YNU-A
HP96
HP120
1. Use dedicated power supplies for the outdoor unit. Ensure OC and OS are wired individually.
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. If the voltage drops, use a wire that is one rank thicker in diameter. Make sure the power-supply
voltage does not drop more than 10%. Make sure that the voltage imbalance between the phases is 2% or less.
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 245 IEC57). For example, use
wiring such as YZW.
6. A switch with at least 3 mm [1/8 in.] contact separation in each pole shall be provided by the Air Conditioner installer.
7. For details on indoor unit wiring and breaker for current leakage, refer to the indoor unit Instruction Book and Installation Manual.
Be sure to use specified wires for connections and ensure no external force is imparted to terminal connections. If connections are not fixed firmly, heating or fire
may result.
Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
The breakers for current leakage should support Inverter circuit. (e.g. Mitsubishi Electric's NV-C-Series or equivalent). If no earth leakage breaker is installed, it
may cause an electric shock.
Breakers for current leakage should combine using of switch.
Do not use anything other than a breaker with the correct capacity. Using a breaker of too large capacity may cause malfunction or fire.
If a large electric current flows due to malfunction or faulty wiring, earth-leakage breakers on the unit side and on the upstream side of the power supply system
may both operate.
Depending on the importance of the system, separate the power supply system or take protective coordination of breakers.
MEES19K180
2
Minimum cable size [mm
(AWG)]
Main cable
Ground
208V
230V
208V
21.2 (4)
13.3 (6)
21.2 (4)
21.2 (4)
21.2 (4)
21.2 (4)
21.2 (4)
21.2 (4)
21.2 (4)
2
Minimum wire thickness [mm
(AWG)]
Main cable
Branch
5.3 (10)
-
5.3 (10)
-
8.4 (8)
-
230V
208V
13.3 (6)
60A 100mA 0.1sec. or less
21.2 (4)
70A 100mA 0.1sec. or less
21.2 (4)
70A 100mA 0.1sec. or less
Ground
5.3 (10)
25A 30mA or 100mA 0.1sec. or less
5.3 (10)
30A 30mA or 100mA 0.1sec. or less
8.4 (8)
35A 30mA or 100mA 0.1sec. or less
Hyper Heating Inverter R2-Series
Breaker for current leakage
230V
50A 100mA 0.1sec. or less
60A 100mA 0.1sec. or less
60A 100mA 0.1sec. or less
Breaker for current leakage
460V
79
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