We were called out today to look at the installation of a 40 amp cooktop. We took apart the junction box feeding the appliance whip and discovered 10 gauge wire capable of delivering 30 amps to the cooktop. We then provided a solution to run the correct wire to properly feed a 40 amp cooktop. After discussing options with home owner, we then talked about possibly finding a cook top with the same amperage and still with us hooking up the new unit. Customer will take some time on what option she would like then call us back out.