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13
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)
Cross
Section
AWG
(mm
2
)
Length
in.(m)
Rated
Current of
Overow
Breaker(A)
Rated current of residual
Circuit Breaker(A)
Ground Fault Interrupter(mA)
Response time(S)
Cross Sectional
Area of Signal Line
<7 14(2.5) 65.6(20) 10 10 A,30 mA,0.1S or below
16 AWG (1.25mm
2
)
≥7 and <11 12(4) 65.6(20) 15 15 A,30 mA,0.1S or below
≥11and <16 10(6) 82(25) 20 20 A,30 mA,0.1S or below
≥16 and <22 8(8) 98.4(30) 30 30 A,30 mA,0.1S or below
≥22 and <27 6(10) 131(40) 30 30 A,30 mA,0.1S or below
• The shielding lay of the controller wire must be grounded at one end.
• The total length of the controller wire shall not be more than 1968ft(600m).
Wired Controller ABC Chart
Length of Controller Wire ft (m) Wiring Dimensions AWG (mm
2
)
<328(100) 22(0.3) x 3 core shielding line
≥328(100) and <656(200) 20(0.5) x 3 core shielding line
≥656(200)and <984(300) 18(0.75) x 3 core shielding line
≥984(300) and <1312(400) 16(1.25) x 3 core shielding line
≥1312(400) and <1968(600) 14(2) x 3 core shielding line
• The electrical power line and signal lines must be tightened.
• Every indoor unit must have a ground connection.
• The power wire should be size up if it exceeds the permissible length.
• Shielding of the wire of all the indoor and outdoor units should be connected together and grounded at one point.
• Signal lines should not exceed 3280ft(1000m).
Electrical Wiring
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