Electrical Wiring; Power Wiring; Special Instructions For Power Wiring With Aluminum Conductors - Rheem RACA14 Series Installation Instructions Manual

TABLE A
BRANCH CIRCUIT COPPER WIRE SIZE
(BASED ON 1% VOLTAGE DROP)*
16
XI. ELECTRICAL WIRING
Field wiring must comply with the National Electrical Code* and local ordinances that may
apply.
*C.E.C. in Canada
WARNING
!
TURN OFF THE MAIN ELECTRICAL POWER AT THE BRANCH CIRCUIT
DISCONNECT CLOSEST TO THE UNIT BEFORE ATTEMPTING ANY WIRING.
FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK RESULTING IN
PERSONAL INJURY OR DEATH.
A. POWER WIRING
1. It is important that proper electrical power is available at the unit. Voltage should
not vary more than 10% from that stamped on the unit rating plate. On three phase
units, phases must be balanced within 3%.
2. Install a branch circuit disconnect within sight of the unit in accordance with the
N.E.C., C.E.C., or local codes.
3. For branch circuit wiring (main power supply to unit disconnect), the minimum wire
size can be determined from Table A using the circuit ampacity found on the unit
nameplate.
4. This unit incorporates single point electrical connection for unit and electric heat
accessory.
5. Power wiring must be run in grounded rain-tight conduit. Connect the power field
wiring as follows:
a. NO ELECTRIC HEAT - Connect the field wires directly to the contactor in the
unit control box. Connect ground wire to ground lug.
b. WITH ELECTRIC HEAT - Connect the field wires to the terminal block on the
electric heater kit. Connect the ground wire to the ground lug on the heater kit.
NOTE: For field installation of the heater kit, follow the instructions provided with the heat-
er kit.
6. The pigtail wires in the electric heat box are factory wired to the contactor in the
control box and are protected by internal fuses in the hinged fuse box mounted
under the control box. See label on fuse box cover for fuse sizing.
7. DO NOT connect aluminum field wires to electric heat kit power input terminals.
B. SPECIAL INSTRUCTIONS FOR POWER WIRING WITH ALUMINUM
CONDUCTORS.
1. Select the equivalent aluminum wire size from Table B:
2. Attach a length (6" or more) of recommended size copper wire to the unit terminals
L1 and L3 for single phase, L1, L2, L3 for three phase.
3. Splice copper wire pigtails to aluminum wire with U.L. recognized connectors for
copper-aluminum splices (Table B). Follow these instructions very carefully to make
a positive and lasting connection;
a. Strip insulation from aluminum conductor.
b. Coat the stripped end of the aluminum wire with the recommended inhibitor and
wire brush aluminum surface through inhibitor. Inhibitors: Brundy, Pentex "A";
TABLE B
WIRE SIZES
AWG Copper AWG Aluminum
Wire Size Wire Size
#12 #10
#10 #8
#8 #6
#6 #4
#4 #2
#3 #1
#2 #0
#1 #00
#0 #000
Connector Type and Size
(or equivalent)
T&B Wire Nut PT2
T&B Wire Nut PT3
Ilsco Split Bolt AK-6
Ilsco Split Bolt AK-4
Ilsco Split Bolt AK-2
Ilsco Split Bolt AK-1/0
Ilsco Split Bolt AK-1/0
Ilsco Split Bolt AK-2/0
Ilsco Split Bolt AK-4/0