California
Contractors License

A general building contractor is a contractor whose principal contracting business is in connection with any structure built, being built, or to be built, for the support, shelter, and enclosure of persons, animals, chattels, or movable property of any kind, requiring in its construction the use of at least two unrelated building trades or crafts, or to do or superintend the whole or any part thereof.

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A General Electrician is one who performs work for a C-10 electrical contractor installing, constructing or maintaining any electrical system that is covered by the National Electric Code.

A Residential Electrician (1) performs work for a C-10 electrical contractor installing, constructing, or maintaining any electrical system that is covered by the National Electrical Code in single family homes and multi family units, including hotels and motels, where the primary occupancy of the building is considered residential and the maximum voltage received from a utility company is a 3 phase, 4 wire, 120/208 or 120/240 volts.  2) performs work for a C-10 electrical contractor installing the required panel boards and feeders for commercial tenant space in a multi-family/multi-use occupancies falling under subsection (1) above, where less than 50 percent of the first floor level is used for commercial tenant space, but not performing any tenant improvement for these spaces.  (3) does not perform work in occupancies that fall under the scope of Article 517 of the National Electrical Code.

A Fire/Life Safety Technician is one who performs work for a C-10 electrical contractor involving the installation, construction or maintenance of systems covered by Article 760 of the National Electrical Code, and the National Fire Alarm Code.

A framing and rough carpentry contractor performs any form work, framing or rough carpentry necessary to construct framed structures; installs or repairs individual components of framing systems and performs any rough carpentry or associated work, including but not limited to the construction or installation of: sub-flooring, siding, exterior staircases and railings, overhead doors, roof decking, truss members, and sheathing.

A general engineering contractor is a contractor whose principal contracting business is in connection with fixed works requiring specialized engineering knowledge and skill, including the following divisions or subjects: irrigation, drainage, water power, water supply, flood control, inland waterways, harbors, docks and wharves, shipyards and ports, dams and hydroelectric projects, levees, river control and reclamation works, railroads, highways, streets and roads, tunnels, airports and airways, sewers and sewage disposal plants and systems, waste reduction plants, bridges, overpasses, underpasses and other similar works, pipelines and other systems for the transmission of petroleum and other liquid or gaseous substances, parks, playgrounds and other recreational works, refineries, chemical plants and similar industrial plants requiring specialized engineering knowledge and skill, powerhouses, power plants and other utility plants and installations, mines and metallurgical plants, land leveling and earthmoving projects, excavating, grading, trenching, paving and surfacing work and cement and concrete works in connection with the above mentioned fixed workstable