Carrier XCT 7 Series - Electrical Wiring; Power and Signal Line Specifications; Wired Controller Signal Line Specs

Electrical Wiring
The wiring for the power line of the indoor unit, the wiring between indoor and outdoor units, and the wiring between
indoor units:
• The electrical power line and signal lines must be fastened tightly.
• Every indoor unit must have a ground connection.
• The power line should be enlarged if it exceeds the permissible length.
• Shielded lays of all the indoor and outdoor units should be connected together, with the shielded lay at the side of the
signal lines of the outdoor units grounded at one point.
• The whole length of the signal line should not exceed 1000m.
Signal Wiring of Wired controller
• The shielding lay of the signal line must be grounded at one end.
• The total length of the signal line should not be more than 250m.
Length of Signal Line (m) Wiring Dimensions
≤ 250 0.75mm
2
× core shielding line
Items
Total Current of
Indoor Units(A)
Cross
Section
(mm
2
)
Length
(m)
Rated
Current of
Overow
Breaker(A
Rated Current of Residual
Circuit Breaker(A) Ground
Fault Interrupter(mA) Re-
sponse time(S)
Cross Sectional
Area of Signal Line
Outdoor -indoor
(mm
2
)
Indoor -indoor
(mm
2
)
<6 2.5 20 10 10 A,30 mA,0.1S or below
2 cores×0.75-2.0mm
2
shielded line
≥6 and <10 4 20 16 16 A,30 mA,0.1S or below
≥10 and <16 6 25 20 20 A,30 mA,0.1S or below
≥16 and <25 8 30 32 32 A,30 mA,0.1S or below
≥25 and <32 10 40 32 32 A,30 mA,0.1S or below
20
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