23
Electric wiring and the application
Indoor power source and communication wiring
Item
Indoor
total
current (A)
Power
cable
section
(mm
2
)
Wire
length
(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
(mm
2
)
Indoor/
indoor
(mm
2
)
<1
3
1.5
20
20
20A, 30mA, below 0.1s
2-core × (
1
.0mm
2
)
shielded wire
≥
1
3
and <1
6
2
.5
25
30
30A, 30mA, below 0.1s
≥
15 and <22
4.0
30
40
40A, 30mA, below 0.1s
≥
22 and <27
6.
0
40
50
50A, 30mA, below 0.1s
• Power cable and communication wire must be
fi
xed
fi
rmly.
• Each indoor must be grounded well.
• When power cable exceeds the range, increase the gauge appropriately.
• Shielded layer of communication wires must be connected together and be earthed at single
point.
• Communication wire total length cannot exceed 1000m.
Communication wire for wired controller
Wire length(m)
Wire spec
Wire length(m)
Wire spec
<100
0.3mm
2
×(3-core) shielded wire
≥
300 and <400
1.25mm
2
×(3-core) shielded
wire
≥
100 and <200 0.5mm
2
×(3-core) shielded wire
≥
400 and <600
2mm
2
×(3-core) shielded
wire
≥
200 and <300
0.75mm
2
×(3-core) shielded
wire
• Shielded layer of communication wire must be grounded at one end.
• The total length cannot exceed 600m.
