You generally may not work in any of the following hazardous occupations:
Manufacturing and storing of explosives
Driving a motor vehicle and being an outside helper on a motor vehicle
Coal mining
Logging and sawmilling
Power-driven woodworking machines
Exposure to radioactive substances
Power-driven hoisting apparatus
Power-driven metal-forming, punching, and shearing machines
Mining, other than coal mining
Meat packing or processing (including the use of power-driven meat-slicing machines)
Power-driven bakery machines
Power-driven paper-product machines
Manufacturing brick, tile, and related products
Power-driven circular saws, band saws, and guillotine shears
Wrecking, demolition, and ship-breaking operations
Roofing operations and all work on or about a roof
Excavation operations
There are some exemptions for apprentice/student-learner programs in some of these hazardous occupations.
Hazardous Occupations Note: When you are 18 you can work any job for any number of hours. The Child Labor rules no longer apply to you.
NOTE: Different rules apply to farms, and individual States may have stricter rules. Here is another website regarding Child Labor: http://www.dol.gov/whd/childlabor.htm