Electricians

Electricians install and maintain electrical systems in homes, businesses, and factories.

Electricians typically do the following:

  • Read blueprints or technical diagrams before doing work
  • Install and maintain wiring and lighting systems
  • Inspect electrical components, such as transformers and circuit breakers
  • Identify electrical problems with a variety of testing devices
  • Repair or replace wiring, equipment, or fixtures using hand tools and power tools
  • Follow state and local building regulations based on the National Electric Code
  • Direct and train workers to install, maintain, or repair electrical wiring or equipment

Almost every building has an electrical system that is installed during construction and maintained after that. Electricians do both the installing and maintaining of electrical systems.

Installing electrical systems is less complicated than maintaining older equipment. This is because it is easier to get to electrical wiring during construction. Maintaining older equipment, however, involves identifying problems and repairing malfunctioning equipment that is sometimes difficult to reach. Electricians doing maintenance work may need to fix or replace outlets, circuit breakers, motors, or robotic control systems.

Electricians read blueprints, which are technical diagrams of electrical systems that show the location of circuits, outlets, and other equipment. They use different types of hand and power tools, such as pipe benders, to run and protect wiring. Other commonly used hand and power tools include screwdrivers, wire strippers, drills, and saws. While troubleshooting, electricians also may use ammeters, voltmeters, and multimeters to find problems and ensure that components are working properly.

Many electricians work independently, but sometimes they collaborate with others. For example, experienced electricians may work with building engineers and architects to help design electrical systems in new construction. Some electricians also may consult with other construction specialists, such as elevator installers and heating and air conditioning workers, to help install or maintain electrical or power systems. At larger companies, electricians are more likely to work as part of a crew; they may direct helpers and apprentices to complete jobs.

The following are examples of occupational specialties:

Inside electricians maintain and repair large motors, equipment, and control systems in businesses and factories. They use their knowledge of electrical systems to help these facilities run safely and efficiently. Some also install the wiring for businesses and factories that are being built. To minimize equipment failure, inside electricians often perform scheduled maintenance.   

Residential electricians install wiring and troubleshoot electrical problems in peoples' homes. Those who work in new-home construction install outlets and provide access to power where needed. Those who work in maintenance and remodeling repair and replace faulty equipment. For example, if a circuit breaker is tripped, electricians determine the reason and fix it.


Mechanical Engineering Technicians

Mechanical engineering technicians help mechanical engineers design, develop, test, and manufacture industrial machinery, consumer products, and other equipment. They may make sketches and rough layouts, record and analyze data, make calculations and estimates, and report their findings.

Mechanical engineering technicians typically do the following:

  • Evaluate drawing designs for new or changed tools by measuring dimensions on the drawing and comparing them with the original specifications
  • Prepare layouts and drawings of parts to be made and the process for putting them together
  • Discuss changes with coworkers--for example, in the design of the part, in the way it will be made and put together, and in the techniques and process they will use
  • Review instructions and blueprints for the project to ensure the test specifications, procedures, and objectives
  • Plan, make, and put together new or changed mechanical parts for products, such as industrial machinery or equipment
  • Set up and conduct tests of complete units and of parts as they would really be used, as a way to investigate proposals for improving equipment performance
  • Record test procedures and results, numerical and graphical data, and recommendations for changes in product or test methods
  • Analyze test results in regarding design specifications and test objectives

Mechanical engineering technicians also estimate labor costs, equipment life, and plant space. Some test and inspect machines and equipment or work with engineers to eliminate production problems. They may assist in testing products by, for example, setting up instrumentation for vehicle crash tests.


Electrical and Electronics Engineers

Electrical engineers design, develop, test, and supervise the manufacturing of electrical equipment such as electric motors, radar and navigation systems, communications systems, or power generation equipment. Electrical engineers also design the electrical systems of automobiles and aircraft.

Electronics engineers design and develop electronic equipment such as broadcast and communications systems, from portable music players to global positioning systems (GPS). Many also work in areas closely related to computer hardware.

Electrical engineers typically do the following:

  • Design new ways to use electrical power to develop or improve products
  • Do detailed calculations to compute manufacturing, construction, and installation standards and specifications
  • Direct manufacturing, installing, and testing to ensure that the product as built meets specifications and codes
  • Investigate complaints from customers or the public, evaluate problems, and recommend solutions
  • Work with project managers on production efforts to ensure projects are completed satisfactorily, on time, and within budget

Electronics engineers typically do the following:

  • Design electronic components, software, products, or systems for commercial, industrial, medical, military, or scientific applications
  • Analyze electrical system requirements, capacity, cost, and customer needs and then develop a system plan
  • Develop maintenance and testing procedures for electronic components and equipment
  • Evaluate systems and recommend repair or design modifications
  • Inspect electronic equipment, instruments, and systems to make sure they meet safety standards and applicable regulations
  • Plan and develop applications and modifications for electronic properties used in parts and systems to improve technical performance

Electronics engineers who work for the federal government research, develop, and evaluate electronic devices used in diverse technologies, such as aviation, computing, transportation, and manufacturing. They work on federal electronic devices and systems, including satellites, flight systems, radar and sonar systems, and communications systems.

The work of electrical engineers and electronics engineers is often similar. Both use engineering and design software and equipment to do engineering tasks. Both types of engineers must also work with other engineers to discuss existing products and possibilities for engineering projects.

Engineers whose work is related exclusively to computer hardware are considered computer hardware engineers. For more information about this occupation, see the profile on computer hardware engineers.


Electrical and Electronics Installers and Repairers

Electrical and electronics installers and repairers install, repair, or replace a variety of electrical equipment in telecommunications, transportation, utilities, and other industries.

Electrical and electronics installers and repairers typically do the following:

  • Prepare cost estimates for clients
  • Refer to service guides, schematics, and manufacturer specifications
  • Repair or replace defective parts, such as motors, fuses, or gaskets
  • Reassemble and test equipment after repairs
  • Maintain records of parts used, labor time, and final charges

Electrical and electronics installers and repairers work on complex pieces of electronic equipment.

Automated electronic control systems are becoming increasingly complex. As a result, repairers use software programs and testing equipment to diagnose malfunctions. Among their diagnostic tools are multimeters--which measure voltage, current, and resistance--and advanced multimeters, which measure the capacitance, inductance, and current gain of transistors.

Repairers also use signal generators, which provide test signals, and oscilloscopes, which display signals graphically. In addition, repairers use handtools such as pliers, screwdrivers, soldering irons, and wrenches to replace faulty parts and adjust equipment.

Commercial and industrial equipment electrical and electronics repairers repair, test, adjust, or install electronic equipment, such as industrial controls, transmitters, and antennas.

Electrical and electronics installers and repairers of transportation equipment install, adjust, or maintain mobile communication equipment, including sound, sonar, security, navigation, and surveillance systems on trains, watercraft, or other vehicles.

Powerhouse, substation, and relay electrical and electronics repairers inspect, test, maintain, or repair electrical equipment used in generating stations, substations, and inservice relays. These workers may be known as powerhouse electricians, relay technicians, or power transformer repairers.

Electric motor, power tool, and related repairers--such as armature winders, generator mechanics, and electric golf cart repairers--specialize in installing, maintaining, and repairing electric motors, wiring, or switches.

Electronic equipment installers and repairers of motor vehicles install, diagnose, and repair sound, security, and navigation equipment in motor vehicles. Motor vehicle installers and repairers work with an increasingly complex range of electronic equipment, including DVD players, navigation systems, and passive and active security systems.

Electrical and electronic installers and repairers may specialize, according to how and where they work:

Field technicians often travel to factories or other locations to repair equipment. When equipment breaks down, field technicians go to a customer's site to repair the equipment. Because repairing components is a complex activity, workers on the factory floor usually remove and replace defective units, such as circuit boards, instead of fixing them. Defective units are discarded or returned to the manufacturer or a specialized shop for repair.

Bench technicians work in repair shops in factories and service centers, fixing components that cannot be repaired on the factory floor. These workers also locate and repair circuit defects, such as poorly soldered joints, blown fuses, or malfunctioning transistors.


Mechanical Engineers

Mechanical engineering is one of the broadest engineering disciplines. Mechanical engineers research, design, develop, build, and test mechanical devices, including tools, engines, and machines.

Mechanical engineers typically do the following:

  • Analyze problems to see how a mechanical device might help solve the problem
  • Design or redesign mechanical devices, creating blueprints so the device can be built
  • Develop a prototype of the device and test the prototype
  • Analyze the test results and change the design as needed
  • Oversee the manufacturing process for the device

Mechanical engineers use many types of tools, engines, and machines. Examples include the following:

  • Power-producing machines such as electric generators, internal combustion engines, and steam and gas turbines
  • Power-using machines, such as refrigeration and air-conditioning
  • Industrial production equipment, including robots used in manufacturing
  • Other machines inside buildings, such as elevators and escalators
  • Machine tools and tools for other engineers
  • Material-handling systems, such as conveyor systems and automated transfer stations

Like other engineers, mechanical engineers use computers extensively. Computers help mechanical engineers to do the following:

  • Produce and analyze designs
  • Simulate and test how a machine is likely to work
  • Generate specifications for parts
  • Monitor the quality of products
  • Control manufacturing and production

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