Connecting to ground or neutral

Hello,

I suspect on teh wiring from the house the black&white will be the hot wires and the bare will be ground/neutral

use a volt meter before connecting tonew cooktop and check for;
black/bare to have 120volts
white/bare to have 120volts

if that is what you find...connect new cooktop as such;

black to black
red to (house) white

(cooktop) white and green to bare


GENE

Hi, depending on your local electrical code:and I see that the unit is 240 Volts A.C., then RED=Power/Black=POWER(L1 & L2)/WHITE="N"Neutral/and GREEN=SAFETY GROUND,on the new unit, then use from the wall power BLACK = L1 and White= L2. then on the unit RED=L1 and BLACK=L2(either way you hook these 2 up there isn't a polarity issue on these 2 wires) on the units hook-up/then use the BARE supply wire as neutral and tie BOTH WHITE and GREEN from the unit together to this BARE wire..

Take care

depending on your local electrical code:and I see that the unit is 240 Volts A.C., then RED=Power/Black=POWER(L1 & L2)/WHITE="N"Neutral/and GREEN=SAFETY GROUND,on the new unit, then use from the wall power BLACK = L1 and White= L2. then on the unit RED=L1 and BLACK=L2(either way you hook these 2 up there isn't a polarity issue on these 2 wires) on the units hook-up/then use the BARE supply wire as neutral and tie BOTH WHITE and GREEN from the unit together to this BARE wire

The green goes to the bare ONLY.

Likely the black was used as a neutral and the reds were 240 volts.

You need to investigate at your panel. If you see the black going to the neutral bar, abandon it by capping with wire nut. If you see both the reds going to adjacent terminals on a double breaker, connect one red to the red and the other red to the black of the cooktop,

Old plug: green is ground, white and blace are both hot power. New cooktop: green is ground, WHITE is COMMON, black and RED are hot power. You are going to need an electrician to run a new circuit and plug for your new cooktop.

the new cooktops and ovens now have a 4th wire used for separating the ground and neutral. some new homes and remodeled homes have a 4th wire run from the circuit panel to the unit.
you dont have this but it is ok to just hook up the white and green/ground wires together. then red to red and black to black. it will work properly and thats all you have to do.

from supply
white, black - should be hot then ground

On cooktop
red, black - should be hot white - neutral then ground

If you have a volt meter measure
supply
between white - black 220v
between white or black - ground 110

cooktop
between red - black 220v
between red or black - ground or neutral 110

If the above is confirmed
connect
red (cooktop) to white(supply)
black (cooktop) to black(supply)
white (cooktop) to ground(supply)

Regards

To complying with changed Codes (effective in 2002 ) regarding stoves, ovens and dryers. You will need a 120/240 volt 4 wire 40 amp and 50 amp circuit. This
Decades ago it was permitted to use a 3 wire system (having two 120 volt hots (Black and Red) and 1 combination ground/neutral wire) (green and white) to serve stoves, cooktops, ovens and dryers.
The Code change now requires all stoves and dryers in NEW construction to have the 4 wire set-up (now having two 120 volt hots, 1 white neutral and one green or bare wire ground).
Existing wiring is grand-fathered under the Code change.....I advise you to change the feed wiring over to the the 4 wire set-up...
because - as with ALL Code changes in the past...it will eventually become mandatory for all stoves, ovens and dryers as the grand-father clause drops off. By complying now...
BUT the wiring will need to change to 8/3 with ground. (having 4 wires inside one outer jacket).This is the primary reason for the Code change....to provide a greater margin of safety to the user.
I can NOT recommend the 3 wire hook-up...the 4 wire provides a seperate ground and neutral -
which makes the chance of a user shock when touching the metal frame (from an internal fault in the oven) much less likely then the old 3 wire set-up....
which did NOT have the seperate ground and neutral.
Krazytech

On Cooktop From Box
| |
Black to Black
Red to Black w/red stripe
White to Ground
Green to Cooktop frame

You do need a 208/240 volt supply from your service panel. The green is ground, white is nuetral, and the red and black should measure 120 volts each to ground or 240/208 between each other. It is normal for most breaker panels to supply 208/240 between adjacent insulators. If you are only getting 1/2 of that then the circuit breaker may not be straddling the insulator bar but be 1/2 notch out and both breaker pins contacting the same 110 supply.