J-Box Installation; External Electrical Box On Furnace Casing - Carrier 59SC2D Installation, Start-Up, Operating And Service And Maintenance Instructions

Fig. 34 - - Field- -Supplied External Electrical Box on Furnace
Casing
J- -Box Installation
WARNING
!
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
High voltage field connections must be located in J- -Box
with furnace, or in field supplied external disconnect
mounted to furnace.
If field- -supplied manual disconnect switch is to be mounted
on furnace casing side, select a location where a drill or
fastener cannot damage electrical or gas components.
The J- -Box must be used when field line voltage electrical
connections are made to the furnace wiring harness inside the
furnace casing. The J- -Box cover is not required if a field- -supplied
external electrical box is attached to the outside of the furnace
casing. The field ground wire and furnace main ground wire are
grounded when the J- -Box bracket is attached to the furnace and
the field ground wire and factory ground wire are secured to the
bracket grounding screw. If the J- -Box cover is not used, the field
and factory spliced connections must be located inside the external
electrical box. Do not leave splice connections unprotected inside
the furnace.
The J- -Box cover, mounting bracket and screws are shipped in the
loose parts bag included with the furnace. See Fig. 35 for J- -Box
mounting locations.
The J- -Box mounting bracket and green ground screw is used as a
grounding point for all line voltage wiring options. The J- -Box
cover may be omitted when electrical connections are made inside
an external electrical box mounted external to the casing.

External Electrical Box on Furnace Casing

NOTE: Check to ensure that external electrical box does not
interfere with duct work, gas piping or the indoor coil drain. See
Fig. 31 for alternate electric entry through top panel.
1. Select and remove 7/8- -in. (22 mm) knock- -out on the
desired side of the casing. Remove the knock- -out from the
casing.
NOTE: If electrical entry through the furnace top panel is used, a
7/8- -in. (22 mm) hole must be drilled through the top panel.
2. Drill two (2) 1/8- -in. (3 mm) pilot holes through the dimples
in the furnace casing near the 7/8- -in. knock- -out.
A190279
Fig. 35 - - Installing J- -Box (When Used)
NOTE: If electrical entry through the furnace top panel is used,
mark the screw hole locations using the mounting holes in the
external electrical box as a template.
29
Fig. 36 - - External Electrical Box
A12226
A190278