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ELECTRICAL WIRING
Wire gauge size and breaker size for total indoor amp draw. Current NEC guidelines and local codes will trump this chart.
Items
Total Current
of Indoor
Units (A)
< 7
7 and < 11
11 and < 16
16 and < 22
22 and < 27
• The electrical power line and signal line connections must be tight.
• Every indoor unit must have a ground connection.
• The power wire should be size up if it exceeds the permissible length.
• Shielding of the control wire of all the indoor and outdoor units should be connected together and grounded at
one point.
• Signal lines should not exceed 3280ft(1000m).
Wired Controller ABC Chart
Length of Controller Wire ft(m) Wiring Dimensions AWG (mm²)
820 (250)
• The shielding layer of the controller wire must be grounded at the outdoor unit chassis ground.
• The total length of the controller wire shall not be more than 820ft(250m).
18
Cross Section
Length
AWG (mm²)
in(mm)
14 (2.5)
65.6 (20)
12 (4)
65.6 (20)
10 (6)
82 (25)
8 (8)
98.4 (30)
6 (10)
131 (40)
18 (0.72) x 3 core shielding line
Rated Current of
Rated Current of
Overflow Breaker
Residual Circuit
(A)
Interrupter (mA)
Response Time (S)
10
10 A, 30 mA, 0.1S or below
15
15 A, 30 mA, 0.1S or below
20
20 A, 30 mA, 0.1S or below
30
30 A, 30 mA, 0.1S or below
30
30 A, 30 mA, 0.1S or below
Cross
Sectional Area
Breaker(A)
of Signal Line
Ground Fault
16 AWG (1.25mm²)
31-5000476 Rev. 0
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