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15
Electric wiring and the application
Indoor power source and communication wiring
Item
Indoor
total
current (A)
Power cable
section
Wire length
ft.(m)
Rated current
of overcurrent
breaker
(A)
Rated current of residual
circuit breaker(A)
Ground fault interruptor(mA)
response time(S)
Communication wire section
Outdoor/indoor Indoor/indoor
<10 14AWG 75.5(23) 20 20A, 30mA, below 0.1s
2-core × (18-14AWG)
shielded wire
≥10 and <15 11AWG 78.7(24) 30 30A, 30mA, below 0.1s
≥15 and <22 9AWG 88.6(27) 40 40A, 30mA, below 0.1s
≥22 and <27 7AWG 137.8(42) 50 50A, 30mA, below 0.1s
• Power cable and communication wire must be rmly connected.
• Each indoor unit must be properly grounded.
• When power cable exceeds the range, use a larger gauge as required.
• The Shielded layer of the communication wires must be connected together and be grounded at at each point.
• Communication wire total length cannot exceed 1000m.
WARNING
• Power lines must be copper wire.
• All indoor and outdoor units must be grounded properly. The ground wire must not be grounded using a gas pipe,
water pipe, lightning rod or telephone wire. If the grounding is correct it may cause electric shock or re.
• Power supply must be installed with an earth leakage circuit breaker, otherwise it may cause electrical shock or re.
• The operation and maintenance of the electrical equipment shall be carried out with the power supply off.
• The indoor and outdoor units each get their own independent power supply.
• The communication line and the power line must be separate.
Communication wire for wired controller
Wire length (ft.(m)) Wire spec Wire length(m) Wire spec
<328(100) 22AWG ×(3-core) shielded wire ≥984(300)and <1312(400) 16AWG ×(3-core) shielded wire
≥328(100) and <656(200) 19AWG×(3-core) shielded wire ≥1312(400) and <1968(600) 14AWG ×(3-core) shielded wire
≥656(200) and <984(300) 18AWG ×(3-core) shielded wire
• Shielded layer of communication wire must be grounded at one end.
• The total length cannot exceed 600m.
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