Thermador PRSG304 Installation Instructions Manual page 19

STEP 6: ELECTRICAL REQUIREMENTS, CONNECTION & GROUNDING
Recommended Grounding Method –
Models PRSG304 and PRSG36
The 30" and 36" 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 malfunction (such as
continuous sparking of the burner igniters), may damage this appli-
ance, 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 –
Models PRSG304 and PRSG36
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 Figures 20 and 21.)
DO NOT GROUND TO A GAS SUPPLY PIPE.
Grounding Method –
Models PRES304, PRSE36 and PRSE48
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 L1 (black) and L2 (red) hot leads 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 appli-
cable codes.
Page 19
FIG. 19 Recommended
Grounding Method –
Models PRSG304 and
PRSG36
RECEPTACLE
BOX COVER
PLATE
THREE-PRONG
RECEPTACLE
THREE-PRONG
PLUG
FIG. 20 Alternate
Grounding Method –
Models PRSG304 and
PRSG36
TWO-PRONG
RECEPTACLE
COVER
PLATE
GROUND
WIRE
GROUND
THREE-PRONG WIRE
ADAPTER
THREE-PRONG
PLUG
FIG. 21 Grounding to a Metal
Cold Water Pipe
NO. 4 WIRE
METER
CLAMP
METAL WATER PIPE
GROUNDED
COLD WATER
PIPE
CLAMP