Installation Manual 49
ENGLISH
Electrical Wiring
Transmission and Power Lines
1) Transmission cable
• Types : shielding wire CVVS or CPEVS
• Diameter : over 0.75mm
2
• Insulation material : PVC
• Maximum allowable temperature: 60°C
• Maximum allowable line length: under 220m
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Diameter : over 0.75mm
2
• Insulation material : PVC
4) Separation of transmission and power lines
• If transmission and power lines are run alongside each other then here is a strong likelihood of operational
faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic cou-
pling.
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
conduit.
• In the same way, when grouping the power lines and signal lines should not be bunched together.
Current capacity of power line
Spacing
10A
300mm
50A
500mm
100A
1000mm
100A or more
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.
■
Use a power wire pipe for the power wiring.