94
The wiring for the power line of indoor unit, the wiring between indoor and outdoor units as well as the wiring
between indoor units:
■ The electrical power line and signal lines must be fastened tightly.
■ Every indoor unit must have the ground connection.
■ The power line should be enlarged if it exceeds the permissible length.
■ Shielded lays of all the indoor and outdoor units should be connected together, with the shielded lay at the side of
signal lines of outdoor units grounded at one point.
■ It is not permissible if the whole length of signal line exceeds 1000m.
Items
Total
current of
indoor units
(A)
Cross
section
(mm
2
)
Length
(m)
Rated
current of
overow
breaker
(A)
Rated current of residual
circuit breaker (A)
ground fault Interruptor (mA)
response time (S)
Cross sectional
area of signal Line
Outdoor-indoor
(mm
2
)
Indoor-indoor
(mm
2
)
<10 2 20 20 20 A,30 mA,0.1S or below
2 cores×(0.75-2.0)mm
2
shielded line
≥10 and <15 3.5 25 30 30 A,30 mA,0.1S or below
≥15 and <22 5.5 30 40 40 A,30 mA,0.1S or below
≥22 and <27 10 40 50 50 A,30 mA,0.1S or below
Signal wiring of wired controller
Length of signal line (m) Wiring dimensions
≤ 250 0.75mm
2
×3 core shielded line
※
The shielding lay of the signal line must be grounded at one end.
※
The total length of the signal line shall not be more than 250m.
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