Recommended Wire Length And Diameter - Panasonic CU-KS18NKU Technical & Service Manual

3-7. Recommended Wire Length and Diameter

Regulations on wiring diameter differ from locality to locality. For field wiring
requirements, please refer to your local electrical codes. Carefully observe these
regulations when carrying out the installation.
Table 5 lists recommended wire lengths and diameters for power supply systems.
NOTE
Refer to the wiring system diagram (Fig. 23) for the meaning of (A), (B), and (C) in
Table 5.
Refer to your local codes or in the absence of local codes see the National Elec-
tric Code: ANSI/NFPA70.
Table 5
AWG
Model
CU-KS18NKU, CU-KS18NKUA
CU-KS24NKU
CU-KS24NKUA
WARNING
Be sure to comply with local codes on running the wire
from the indoor unit to the outdoor unit (size of wire and
wiring method, etc.).
Each wire must be firmly connected.
No wire should be allowed to touch refrigerant tubing, the
compressor, or any moving part.
WARNING
To avoid the risk of electric shock, each air conditioner
unit must be grounded.
For the installation of a grounding device, please
observe local electrical codes.
Grounding is necessary, especially for units using
inverter circuits, in order to release charged electricity
and electrical noise caused by high tension.
Otherwise, electrical shock may occur.
Place a dedicated ground more than 7' (2 m) away from
other grounds and do not have it shared with other elec-
tric appliances.
CAUTION
Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram.
The indoor unit draws its power from the outdoor unit.
Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone,
security system, or intercom any closer than 3'4" (1 m) from the power cable and wires
between the indoor and outdoor units. Electrical noise may affect the operation.
(A)+(B) (A) Power Supply Wiring Length (ft)
(B) Power Line Length (ft)
(#14)
131 (Max.)
131 (Max.)
131 (Max.)
(C) Control
Line Length (ft)
(#12) (#14)
230 (Max.) 100 (Max.)
230 (Max.) 132 (Max.)
230 (Max.) 100 (Max.)
# ... AWG (American Wire Gauge)
WIRING SYSTEM DIAGRAM
*
INDOOR
Disconnect
UNIT
switch
Field supply
Terminal
1
2
3
NOTE
*
Disconnect switch may be required by national
or local codes.
CAUTION
Always comply with national and local code
requirements.
14
Fuse or Circuit
Breaker Capacity
15A
20A
20A
OUTDOOR
UNIT
Terminal
(B)
230/208V
1
230/208V
2
230/208V
3
(C)
4
5
Grounding line
6
(B)
Fig. 23
(A)
L
1
L
2
Grounding
line