Thermador PRDS304 - Manual (Page 21)

STEP 6: ELECTRICAL REQUIREMENTS, CONNECTION & GROUNDING
Recommended Grounding Method – All-Gas
Models PRG304, PRG36 and PRG48
The 30," 36" and 48" all-gas ranges are factory equipped with a power
supply cord with a three-prong grounding plug (with polarized parallel
blades). IT MUST BE PLUGGED INTO A MATING GROUNDING TYPE
RECEPTACLE THAT IS CONNECTED TO A CORRECTLY POLARIZED 120
VOLT CIRCUIT. (See Fig. 19). Improper grounding will cause malfunc-
tion (such as continuous sparking of the burner igniters), may
damage this appliance, and could create a condition of shock
hazard at the igniter of each burner. If the circuit does not have a
grounding type receptacle, it is the responsibility and obligation of the
installer or user to have the existing receptacle changed to a properly
grounded receptacle in accordance with all applicable local codes and
ordinances by a qualified electrician. In the absence of local codes and
ordinances, the receptacle replacement shall be in accordance with the
National Electric Code. THE THIRD GROUND PRONG SHOULD NOT,
UNDER ANY CIRCUMSTANCES, BE CUT OR REMOVED.
Alternate Grounding Method – All-Gas
Models PRG304, PRG36 and PRG48
If installing a properly grounded wall receptacle is impossible at the time of
installation, consult your local electrical inspector for permission to
connect a temporary adapter (with polarized blades) which could be
plugged into your present 2-wire receptacle.
(See Fig. 20). This method is not recommended.
If this is done, you must attach the lug and/or the green adapter wire to
the receptacle cover plate screw. Ground from it to a grounded metal cold
water pipe. (See Fig. 21).
DO NOT GROUND TO A GAS SUPPLY PIPE.
Grounding Method – Dual-Fuel
Models PRDS304, PRDS36 and PRDS48
All ranges must be properly grounded. See the grounding instructions for
your installation case, as follows. Refer also to the instructions and
Figures on Pages 17 and 18.
CASE 1: Electrical Connection and Grounding with a 3 Conductor Power
Supply (To be used when local codes permit grounding through
the neutral.) Secure the neutral, grounded wire of the supply
circuit to the neutral terminal of the NEMA 10-50R receptacle.
Connect the L! (black) and the L2 (red) hot heads to the other
terminals on the NEMA 10-50R receptacle. A separate ground
wire is not required. Ensure that the house supply wires and all
electrical connections meet the requirements of all applicable
codes.
NO. 4 WIRE
CLAMP
METER
METAL WATER PIPE
CLAMP
FIG. 20 Alternate
Grounding Method –
Models PRG304, PRG36
and PRSG48
COVER
PLATE
THREE-PRONG
PLUG
GROUNDED
COLD WATER
PIPE
GROUND
WIRE THREE-PRONG
ADAPTER
GROUND
WIRE
TWO-PRONG
RECEPTACLE
FIG. 19 Recommended
Grounding Method –
Models PRG304, PRS36
and PRG48
FIG. 21 Grounding Method –
Models PRDS304,
PRDS36 and PRDS48
RECEPTACLE
BOX COVER
PLATE
THREE-PRONG
RECEPTACLE
THREE-PRONG
PLUG
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