ENGLISH
Installation Manual
55
Electrical Wiring
Communication and Power Lines
1) Communication cable
• Types : shielding wire
• Cross section : over 1.25mm
2
• Maximum allowable temperature: 60°C
• Maximum allowable line length: under 300m
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Cross section : over 0.75mm
2
4) Separation of communication and power lines
• If communication and power lines are run alongside each other then there is a strong likelihood of opera-
tional faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic
coupling.
The tables below indicates our recommendation as to appropriate spacing of communication and power
lines where these are to be run side by side
Note:
1. The figures are based on assumed length of parallel cabling up to 100m. For length in excess of 100m
the figures will have to be recalculated in direct proportion to the additional length of line involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the
table should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when grouping
various lines together for introduction into the conduits
• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same
• In the same way, when grouping the lines power and signal lines should not be bunched together.
Current capacity of power line
Spacing
10A
300mm
50A
500mm
100A
1000mm
Exceed 100A
1500mm
100V or more
CAUTION
■
If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing of the
apparatus must be carried out by a qualified person.
