54
IM 738-2
Electrical Installation:
Field Power Wiring
In compliance with the National Electrical Code, an
electrically isolated 115V circuit is provided in the unit to
supply the factory mounted service receptacle outlet and
optional unit lights. This circuit is powered by a field
connected 15A, 115V power supply. Leads are brought into the
RFS and RPS units through a 7/8" knockout in the bottom of
the main control panel, near the power wire entry point.
Figure 66. RCS 015C–030C power wiring connections
Figure 67. RCS 036C and 135C power wiring connections
(number of condenser fans varies per unit size)
Table 22: Recommended 3-phase power wiring to ensure
disconnects and power blocks mate with power wiring
Notes:
1. All wire sizes assume separate conduit for each set of parallel conductors.
2. All wire sizes based on NEC Table 310-16 for 75°C THW wire (copper).
Canadian electrical code wire ampacities may vary.
3. All wire sizes assume no voltage drop for short power leads.
Conduit and hub
(shipped with
RCS unit)
Terminal block TB8
for 115V service
receptical circuit
7/8" knockout for
TB8 wire entry
switch DS4
or disconnect
Power block PB4
7/8" knockout for
wire entry (field to cut
larger holes as required
for power wire)
Conduit and hub
(shipped with
RCS unit)
Terminal block TB8
for 115V service
receptical circuit
7/8" knockout for
TB8 wire entry
switch DS4
or disconnect
Power block PB4
7/8" knockout for
wire entry (field to cut
larger holes as required
for power wire)
Table 21: Multiple point power connection options
Number of
electrical
circuits
Disconnect
designation
Load
Location
2
DS2
Supply and return fan
motors plus controls
Main control panel
DS1
Balance of unit
Main control panel
2
DS3
Electric heat
Electric heat
control panel
DS1
Balance of unit
Main control panel
3
DS3
Electric heat
Electric heat
control panel
DS2
Supply and return fan
motors plus controls
Main control panel
DS1
Balance of unit
Main control panel
Wire
gauge
Qty./
pole
Insulation
rating
(°C)
No. of
conduits
Conduit
(trade size, in.)
For MCA
up to
(amps)
10
1
75
1
1/2
35
8
1
75
1
3/4
50
6
1
75
1
1
65
4
1
75
1
1 1/4
85
3
1
75
1
1 1/4
100
2
1
75
1
1 1/4
115
1
1
75
1
1 1/4
130
1/0
1
75
1
1 1/2
150
2/0
1
75
1
2
175
3/0
1
75
1
2
200
4/0
1
75
1
2
230
250
1
75
1
2 1/2
255
300
1
75
1
2 1/2
285
350
1
75
1
3
310
400
1
75
1
3
335
500
1
75
1
3
380
3/0
2
75
2
2
400
4/0
2
75
2
2
460
250
2
75
2
2 1/2
510
300
2
75
2
2 1/2
570
350
2
75
2
3
620
400
2
75
2
3
670
500
2
75
2
3
760
250
3
75
3
2 1/2
765
300
3
75
3
2 1/2
855
350
3
75
3
3
930
Summary of Contents for RDT-135c
Page 131: ...IM 738 2 129...
