You will need a heavy duty 3-wire power cord rated at a minimum of 15 Amperes and 20 would be my choice. Microwave ovens can draw well over 10 Amperes alone and having an additional heating element will raise the current consumption further. Hopefully the circuit being used has a circuit breaker rated at 20 amps too. Voltage rating is less important and any you find will be OK at 120VAC and likely hundreds of volts more.
Also, inspect the receptacle too; if the plug shows signs of heat damage, this can be caused by a bad wall receptacle. Look around the cover plate on the wall for any signs of discoloration. This is a sure sign of potential internal damage and both must be replaced to prevent a fire.
Answers & Comments
You will need a heavy duty 3-wire power cord rated at a minimum of 15 Amperes and 20 would be my choice.
Microwave ovens can draw well over 10 Amperes alone and having an additional heating element will raise the current consumption further.
Hopefully the circuit being used has a circuit breaker rated at 20 amps too.
Voltage rating is less important and any you find will be OK at 120VAC and likely hundreds of volts more.
Also, inspect the receptacle too; if the plug shows signs of heat damage, this can be caused by a bad wall receptacle.
Look around the cover plate on the wall for any signs of discoloration.
This is a sure sign of potential internal damage and both must be replaced to prevent a fire.