the service cord should be able to handle the full amperage draw as the load is then divided & sent to each element. if you're using 10 ga. from the service panel u should use the same to feed the oven. the amperage draw per element determines the size wire for each. how many elements are you using? you can use light ga. wire for the elements. for instance this 18 ga is rated for 23 amps. 8240K31 @
McMaster. if you are using to elements they will pull 11 amps each. have you verified their resistance?