During normal school sessions, minors ages 14 and 15 may work a maximum of three hours per day, up to 18 hours per week. 14-15 year olds may work up to 8 hours per day, 40 hours per week, unless attending summer school.From June 1 - Labor Day may work between 7am and 9pm. In South Carolina, the law sets a clear boundary: generally, no employment is authorized for minors under the age of 14. Work certificates are not required for 16 and 17yearolds. Minors aged 14 and 15 can work up to 3 hours per day and a maximum of 18 hours per week. Work hours must fall between 7 a.m. Generally, minors under the age of 14 may not be employed. Minors ages 14 and 15 may not work: During school hours. More than 40 hours in a week when school is not in session.