34
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 interrupter(mA)
response time(S)
Communication wire section
Outdoor/indoor
(mm
2
)
Indoor/indoor
(mm
2
)
<10
2
23
20
20A, 30mA, below 0.1s
2-core × (0.75-2.0mm
2
)
shielded wire
≥10 and <15
3.5
24
30
30A, 30mA, below 0.1s
≥15 and <22
5.5
27
40
40A, 30mA, below 0.1s
≥22 and <27
10
42
50
50A, 30mA, below 0.1s
• Power cable and communication wire must be fixed firmly.
•
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.
•
The total length of communication wire cannot exceed 1000m.
Communication wire for wired controller
Wire length(m)
Wire spec
≤250
0.75mm
2
×(3-core) shielded wire
•
Shielded layer of communication wire must be grounded at one end.
•
The total length cannot exceed 250m.
