50
Outdoor Unit
50
Outdoor Unit
Electrical Wiring
Transmission and Power Lines
1) Communication cable
• Types : shielding wire
•Use wires of size : over 1.25mm
2
• Maximum allowable temperature: 60°C
• Maximum allowable line length: under 1,000m(3,281ft)
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Use wires of size : 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(328ft). For length in excess of
100m(328ft) 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(11-13/16 inch)
50A
500mm(19-11/16 inch)
100A
1,000mm(39-3/8 inch)
Exceed 100A
1,500mm(59-1/16 inch)
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.
