General Considerations - Honeywell T7350 System Engineering

General Considerations

Table 8 lists wiring types, sizes and distances for the T7350
and Excel 10 products. The T7350 terminal strip accepts 18
through 22 AWG (0.82 to 0.34 sq. mm) wire.
Wire Function
Digital Outputs:
W Y G AUX X
Modulating Outputs:
MX MH MC
Remote Humidity
Sensor:
HS HC HP
Discharge Air
Temperature Sensor:
AS
Outdoor Air
Temperature Sensor:
OS
Motion Sensor:
M
Wall Module
connections:
T3-T7
Power Wiring to:
X RH RC
®
L W Bus
ON ORKS
(Non-Plenum).
ORKS ®
L W Bus
ON
(Plenum Rated).
NOTE: 1. The X, RH and RC terminals will accept 14 to 22 AWG. 14 and 16 AWG should be avoided since the stiff cable
interferes with the cover to subbase installation.
Table 8. Field Wiring Reference.
Recommended Wire
Size (Minimum)
18 AWG (0.82 sq mm) Standard thermostat
five wire cable bundle. wire.
18 AWG (0.82 sq mm) 1 pair per output.
18 to 22 AWG 3 wires.
(0.82 to 0.34 sq mm)
18 to 22 AWG 1 pair.
(0.82 to 0.34 sq mm)
18 AWG (0.82 sq mm) 1 pair.
18 to 22 AWG 1 pair.
(0.82 to 0.34 sq mm)
18 to 22 AWG Twisted pair wire is
(0.82 to 0.34 sq mm) recommended for wire
runs longer than 100
ft. The number of pairs
depends on the model
and functions
selected.
1
18 to 14 AWG NEC Class II,
(0.82 to 2.0 sq mm) 140°F (60°C) rating.
use heavier wire for
longer runs.
22 AWG Nema Level IV
(0.34 sq mm) U.L. Type CMR
Twisted pair stranded
conductor,
nonshielded.
22 AWG Nema Level IV
(0.34 sq mm) U.L. Type CMP
Twisted pair stranded
conductor,
nonshielded.
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
Specification or Honeywell Part
Requirement
AK3726
AK3757C, AK3744C,
AK3741A, AK3702x
AK3746C, AK3724,
AK3703x
AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C
AK3757C, AK3744C,
AK3741A, AK3702x
AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C
AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C,
AK3726
AK3702x, AK3741A,
AK3744C, AK3757C,
AK3712x, AK3754
AK3798 (1 pair)
AK3797 (1 pair)
AK3799 (2 pair)
15
Number Distance (Maximum)
1000 feet.
1000 feet.
500 feet.
1000 feet.
500 feet.
1000 feet.
1000 feet.
Limited by line-loss
effects on power
consumption.
Refer to E-bus Wiring
Guidelines Users
Guide 74-2865 for
maximum length and
generic cable
specifications.
—
63-4368