Lennox MCFA024S4-2P

19
Installation Wiring Requirements
Table 7. Single Zone Installation Wiring Requirements
System and Terminal
Designations
 System Voltage
Number of

Wire Type Wire Gauge / MCA
Indoor to Outdoor
Wiring
(Communication/
Power)
1, 2, 3 and GND
18K 208/230VAC 4
Stranded and
unshielded
16AWG
Outdoor to Main Power
L1, L2 and GND
18K 208/230VAC 3
Stranded and
unshielded
16AWG / 17A
Indoor to Outdoor
Wiring
(Communication/
Power)
1, 2, 3 and GND
24K 208/230VAC 4
Stranded and
unshielded
16AWG
Outdoor to Main Power
L1, L2 and GND
24K 208/230VAC 3
Stranded and
unshielded
16AWG / 22A
Indoor to Outdoor
Wiring
(Power only)
L1, L2 and GND
36K 208/230VAC 3
Stranded and
unshielded
16AWG
Indoor to Outdoor
Wiring
(Communication only)
(S1, S2 and GND)
36K 208/230VAC 3 Stranded and shielded 24AWG
Outdoor to Main Power
L1, L2 and GND
36K 208/230VAC 3
Stranded and
unshielded
10AWG / 30A
Indoor to Outdoor
Wiring
(Power only)
L1, L2 and GND
48K 208/230VAC 3
Stranded and
unshielded
16AWG
Indoor to Outdoor
Wiring
(Communication only)
(S1, S2 and GND)
48K 208/230VAC 3 Stranded and shielded 24AWG
Outdoor to Main Power
L1, L2 and GND
48K 208/230VAC 3
Stranded and
unshielded
6AWG / 50A
MCA = Minimum Circuit Amps