A professional job typically signifies that someone is in the highest-level position in his profession, or has the potential for upward mobility with experience. A non-professional job usually means that you perform front-line or lowest-level duties in an industry or company. Laborer jobs and front-line sales and service jobs in retail are listed as examples of non-professional jobs on the University of Illinois website.
The J1772 plug was specifically designed for electric car charging. Problem is, given a typical electric car like the Nissan Leaf, it can take 15 hours to charge the battery from empty to its EPA-rated 75-mile range from that standard household source. Most plug-in cars have a J1772 port, letting them plug into public charging stations.
Time to charge an electric car can take as little as 30 minutes or up to 12 hours. The time it takes to charge depends on the size of the battery and the speed of the charging point. A typical electric car (Nissan LEAF 30kWh) takes 4 hours to charge from empty with a 7kW home charging point. 3.7kW home charger provides about 15 miles per hour of charge. 7kW home charger provides about 30 miles per hour of charge.