If you're planning to increase your electrical load by adding a new major appliance, make sure your panel can handle it. Here ...

When designing power distribution for a facility, you must assume a lighting load no less than that in Table 220.12 [220.12] if the table specifies your occupancy ...

Laundry Circuit Load Calculations Feeder and service load calculation requirements can be found in Part III of Art. 220 in the 2014 NEC.