Thermador An American Icon Professional PRO-GRAND PRD30 Manuel D'installation page 16

NFPA No. 70 current issue. See the following
information in this section (Step 6) for grounding
method.
• Electrical wiring diagrams and schematics are attached
behind the toe kick panel of the range for access by a
qualified service technician.
• The ranges are to be connected to a 240/208 VAC
power supply.
Dual Fuel models must be connected to the power supply
utilizing one of the following methods. For all methods of
connection, the length of the cord or conduit/wiring must
allow the unit to be slid completely out of the cabinet
without having to unplug or disconnect the unit from the
power supply. Recommended minimum free length of cord
or conduit is four feet. Electrical installations and grounding
must be in accordance with all local codes and ordinances,
and/or the National Electric Code, as applicable.
• 4-CONDUCTOR CORD — NORMALLY, A UNIT
MUST BE CONNECTED TO THE POWER SUPPLY
WITH A 3-POLE, 4-CONDUCTOR CORD KIT RATED
125/250 VOLTS, 50 AMPERES, AND MARKED FOR
USE WITH RANGES. The cord kit must be attached to
the range junction box with a strain relief which will fit a
1" diameter hole. If not already equipped, the cord
must have 1/4" faston closed-loop lugs attached to the
free ends of the individual conductors, preferably
soldered in place.
• PERMANENT CONNECTION (HARD WIRING) —
Units may be hard wired to the power supply. The
installer must provide approved flexible aluminum
conduit, 3/4" trade size, maximum 6 feet long. Locate
the junction box on the rear of the unit and remove
cover. Refer to Figure 9a or Figure 9b, depending upon
the range model. Remove the ground strap retaining
screw and bend the ground strap up. Refer to
Figure 10. The conduit must be installed to the junction
box using an approved conduit connector.
Wiring for the unit is to be brought into the junction box
through the conduit. The ends of the wiring must have
1/4" faston closed-loop lugs attached, preferably
soldered in place. Make the connections to the terminal
block provided. Secure the ground lead to the junction
box with the screw previously used to secure the
ground strap. Refer to Figure 12. The free end of the
conduit must be connected to a junction box provided
in the gas and electrical supply zone, as shown in
Figure 3a on page 7.
English 14
If aluminum supply wiring exists in the installation, splice
the aluminum house wiring with appropriate-thickness
gauge copper wire for adapting to the range, using special
connectors designed and certified for joining copper and
aluminum wire. Follow the connector manufacturer's
recommended installation procedure.
WARNING:
Improper connection of aluminum house wiring
can result in a fire or shock hazard. Use only
connectors designed and certified for
connecting to aluminum wire.
Figure 9a: Location of Junction Box on 30" and 36" Ranges