Electrical Installation - Grounding Instructions; Electrical Connection; Four-Wire Connection; Three-Wire Connection - Bosch HBL8743UC Installation Manual

Electrical Installation - Grounding Instructions

The assembled combination oven should be moved in
front of the cabinet opening and the power cable from
the lower oven should be connected to the cabinet
junction box.
All model ovens on the front cover of this installation
instruction manual are dual rated, designed to be
connected to either 208 or 240V AC, 60 Hz, 4 wire,
single-phase power supply.
Model
HBL8463UC
HBL8443UC
HBL8453UC
HBL8743UC
HBL8753UC
HBL87M53UC
The electrical supply should be a 4-wire single phase AC.
Install a suitable conduit box (not furnished). An
appropriately-sized, UL-listed conduit connector must be
used to correctly attach the conduit to the junction box.
Note: Local codes may vary. Installation, electrical
connections and grounding must comply with all
applicable local codes.
If local codes permit grounding through the electrical
supply neutral, connect both the white neutral wire and
the green ground wire from the oven to the white neutral
eletrical supply wire.

Electrical Connection

The four-wire connection is preferred, but where local
codes permit, the three wire connection is also
acceptable.
WARNING
9
When connected to a 4 or 5-wire, 120/208-Volt 3-
phase power supply, the phase C conductor is not
required for the operation of the appliance.
Circuit Required
208V, 60 Hz/ 240V, 60 Hz
30 AMP
208V, 60 Hz/ 240V, 60 Hz
40 AMP

Four-wire Connection

Ungrounded Neutral
Connect the red oven wire to the red electrical supply
▯
wire (hot wire).
Connect the black oven wire to the black electrical
▯
supply wire (hot wire).
Connect the white neutral oven wire to the white
▯
neutral (not bare or green ground) electrical supply
wire.
Connect the green ground oven wire to the bare or
▯
green ground electrical supply wire.

Three-wire Connection

Grounded Neutral
Connect red wire from oven to red wire in junction box.
▯
Connect black wire from oven to black wire in junction
▯
box.
Connect both green ground wire and white wire from
▯
oven to white, green or bare neutral wire in junction
box.
The conduit cable, where connected at the oven, swivels.
Rotate conduit cable upward (or downward) and direct
through hole prepared in cabinet to attach to junction
box.
To maintain serviceability, the flex conduit must not be
shortened and should be routed to permit temporary
removal of the oven.
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