The amperage/current draw of the connected booth will equal the sum of the operating elements within the booth (lights,outlets & HVAC devices) usually 20 amps for an “average”, air conditioner, 15 amps for 1500 watt heater, 30 amps for high output heater. The connected load for outlets will be determined by the devices plugged in. Lights are simply, the wattage and quantity of lamps.