Article 225 does not explicitly state that a subpanel for a commercial location must be a minimum of 60 amps.

However, Section 225.3(B) of the National Electrical Code (NEC) does require that the rating of a subpanel be sufficient for the maximum load that will be connected to it.For a typical outdoor barbecue addition, the load would be calculated based on the amperage rating of the appliances and outlets that will be connected. This would include the amperage rating of the refrigerators, stoves, grills, and other appliances, as well as the amperage rating of the outlets.Once the total load is calculated, the subpanel should be rated for at least 125% of the total load. This is to ensure that the subpanel has enough capacity to handle the maximum load that could be placed on it.In this case, if the calculated load for the outdoor barbecue addition is 40 amps, then the subpanel should be rated for at least 50 amps (40 amps x 125% = 50 amps).Therefore, while the AHJ's requirement that the subpanel be a minimum of 60 amps may not be explicitly stated in Article 225 of the NEC, it is a reasonable requirement based on the need to ensure that the subpanel has sufficient capacity for the maximum load that could be placed on it. Flag for review