--- title: What Is a Generator? | Types, Functions, How It Works & Safety Tips description: Find out what a generator is and what it can do. Learn the different types of generators and core functions, and discover safety tips for using them. image: https://www.carboncollectiveinvesting.com/hubfs/What_is_a_Generator.png --- [![Carbon collective](https://www.carboncollectiveinvesting.com/hubfs/raw_assets/public/CarbonCollective_August2021%20copy/images/carbon-collective-green-investing-logo-white.4f6047d4.svg "Carbon collective")](https://www.carboncollectiveinvesting.com/) - About - Employers - [Sustainable 401(k)](https://www.carboncollectiveinvesting.com/401k) - [401(k) Comparison Tool](https://www.carboncollectiveinvesting.com/401k/plan-comparison-tool) - Individuals - [FAQ](https://www.carboncollective.co/en/knowledge/faqs) - [ETF](https://www.carboncollectivefunds.com/) - Learn - [Sustainable Investing](https://www.carboncollective.co/sustainable-investing) - [Investing Basics](https://www.carboncollective.co/sustainable-investing/investing-basics) - [Blog](https://blog.carboncollective.co/) - [Tools](https://tools.carboncollective.co/calculator/) - Log in - [Carbon Collective](https://app.carboncollective.co) - [Altruist](https://app.altruist.com) [Talk to a human](https://ask.carboncollective.co/f4o5dylkg) [Sign up](https://app.carboncollective.co/sign-up) [Log In](http://app.carboncollective.co/) [![Carbon collective](https://www.carboncollectiveinvesting.com/hubfs/raw_assets/public/CarbonCollective_August2021%20copy/images/carbon-collective-green-investing-logo.53b28bee.svg "Carbon collective")](https://www.carboncollectiveinvesting.com/) - About - Employers - [Sustainable 401(k)](https://www.carboncollectiveinvesting.com/401k) - [401(k) Comparison Tool](https://www.carboncollectiveinvesting.com/401k/plan-comparison-tool) - Individuals - [FAQ](https://www.carboncollective.co/en/knowledge/faqs) - [ETF](https://www.carboncollectivefunds.com/) - Learn - [Sustainable Investing](https://www.carboncollective.co/sustainable-investing) - [Investing Basics](https://www.carboncollective.co/sustainable-investing/investing-basics) - [Blog](https://blog.carboncollective.co/) - [Tools](https://tools.carboncollective.co/calculator/) - Log in - [Carbon Collective](https://app.carboncollective.co) - [Altruist](https://app.altruist.com) [Talk to a human](https://ask.carboncollective.co/f4o5dylkg) [Sign up](https://app.carboncollective.co/sign-up) [Log In](http://app.carboncollective.co/) **[Home](https://www.carboncollectiveinvesting.com/) > [Sustainable Investing](https://www.carboncollectiveinvesting.com/sustainable-investing) >** Generator # Generator ![](https://www.carboncollectiveinvesting.com/hubfs/zach-stein.jpeg) Written by Zach Stein | Reviewed by [Subject Matter Experts](https://www.carboncollectiveinvesting.com/subject-matter-experts) Updated on October 1, 2024 Fact Checked Why Trust Carbon Collective? ### Table of Contents ## What is a Generator? A generator refers to an electrical device that converts a form of energy into electricity. The input energy can be in the form of fuel like petrol, [diesel](https://www.carboncollectiveinvesting.com/sustainable-investing/diesel-fuel), or [natural gas](https://www.carboncollectiveinvesting.com/sustainable-investing/natural-gas). It could also be from water (hydroelectric), wind, or solar power. ## How Do Generators Work? Generators work by using a fuel source to create mechanical energy. It is essential to note that a generator does not actually 'create' electrical energy. Instead, it utilizes the mechanical energy supplied to it to force the movement of electric charges available in the wire of its windings through an external electric circuit. This flow of electric charges forms the output electric current supplied by the generator. [Michael Faraday](https://www.famousscientists.org/michael-faraday/) discovered the modern-day generator, which works on the principle of electromagnetic induction. This is where a magnetic field is used to create voltage and an electric current in a nearby conductor. ## Types of Generator There are two types of generators: ### Dynamos A dynamo uses mechanical energy to create direct current (DC) electricity. It is considered the first electrical generator used to transfer power for industry and the basis of many other later electric-power conversion devices such as the electric motor, rotary converter, and alternating-current alternator. ### Alternators The second type of generator is the alternator, also known as a synchronous generator, which uses mechanical energy to create alternating current (AC) electricity. Alternators are used to produce the power for the electrical systems of modern vehicles. Another usage is in the [diesel-electric locomotives](https://www.up.com/aboutup/special_trains/diesel-electric/index.htm). ## Functions of Generators Generators have many functions. Some of these include: ### Back-up Power During Power Outages When there are power outages, most especially for non-emergency reasons, one of the functions of generators is to provide [backup power](https://www.forbes.com/advisor/home-improvement/best-backup-generators/).  Generators are beneficial for homes and businesses that rely on electricity to function. ### Standby Power for Businesses Another common usage for generators is standby power for businesses. This is where a generator is used as a backup in case the main power supply is lost. This ensures that the business can continue its operation as usual without interruption. ### Temporary Power Supply A generator can also be used as a temporary power supply for events or construction sites. This is where a generator is used to provide power for a limited period of time. ### Permanent Power In some cases, generators are used as a [permanent power source](https://www.backwoodshome.com/dont-discount-a-generator-especially-a-diesel-generator-as-your-primary-power-source/). This is where the generator is used to provide power for an extended period of time. ### Supporting the Main Power Supply Generators are sometimes used to support the main power supply. This is where the generator is used to supplement the power supply during times of high demand. ## Generator Safety Tips Here are ten useful safety tips to follow when using a generator: **1. Do not set a generator indoors or in an enclosed space.** The generator must be placed at least 20 feet from the house, and the engine when exhaust must be directed away from windows or doors. **![How_to_Run_a_Generator_Safely](https://www.carboncollectiveinvesting.com/hs-fs/hubfs/How_to_Run_a_Generator_Safely.png?width=1920&name=How_to_Run_a_Generator_Safely.png)** **2. When buying a generator, it must have a built-in carbon monoxide (CO) safety technology.** There are new generators that have a [device that detects dangerous levels of carbon monoxide](https://komonews.com/news/consumer/new-generator-features-help-reduce-risk-of-death-from-carbon-monoxide-fumes) and turns off the machine when levels rise too high. **3. Avoid electrical hazards.** The outlets on the generator can be used if you do not have a transfer switch yet. Just make sure you follow certain precautions. Thus, it is advisable to plug in devices directly to the generator.4. **4. Do not attempt to backfeed your house.** Backfeeding refers to the attempt to power the wiring on your home by plugging the generator into a wall outlet.  This reckless and dangerous act could present an electrocution risk to utility workers and neighbors with the same utility transformers. Thus, this could also be a cause of an electrical fire. **5. Install a transfer switch prior to the next storm.** The purpose of a [transfer switch](https://www.consumerreports.org/portable-generators/portable-generator-needs-a-transfer-switch-a1069571021/) is to connect the generator to your circuit panel and allows you to power hardwired appliances while averting the safety risk of using extension cords. **6. Never set a portable generator in the rain.** Keep your generator shielded from the rain. Never operate a generator inside a wet or damp area to avoid electrocution. **7. Disable a gas-powered generator and let it cool before refueling.** Letting the engine cool lowers the risk of burns while refueling. **8. Keep extra gasoline and store it properly.** When you store extra gasoline, be sure to store it in a container approved by the [American National Standards Institute (ANSI)](https://www.ansi.org/) and position it in a cool and well-ventilated area. **9. Only use generators that are rated for the voltage and amperage required by your equipment.** Using a generator that is not properly rated could cause damage to your equipment. **10. Make sure the generator is properly grounded.** Your generator must [properly be grounded](https://www.osha.gov/sites/default/files/publications/grounding_port_generator.pdf) to avoid electrocution. ## Key Takeaways A generator is a machine that changes mechanical energy into electrical energy. Generators can be utilized for various purposes, such as backup power during power outages, standby power for businesses, temporary power supply, permanent power, and supporting the main power supply. There are different types of generators, such as dynamos and alternators. Generators must be used safely to avoid risks, such as electrocution and fires. Some safety tips include never running a generator in an enclosed space or indoors, placing the generator at least 20 feet from the house and engine, and using a generator with built-in carbon monoxide (CO) safety technology. Installing a transfer switch is also recommended to avoid using extension cords. If you must use extension cords, make sure they are heavy-duty. Extra gasoline should be stored in a container approved by the ANSI in a cool and well-ventilated area. When using a generator, make sure that it is properly rated for the voltage and amperage required by your equipment and properly grounded. By observing these safety tips, you can use a generator safely and effectively. ## FAQs ### 1. What is a generator? A generator converts mechanical energy into electrical energy. It is usually powered by an internal combustion engine, such as a diesel or gasoline engine. ### 2. How do generators work? Generators work by using a fuel source to create mechanical energy. It utilizes the mechanical energy supplied to it to force the movement of electric charges available in the wire of its windings through an external electric circuit. This flow of electric charges forms the output electric current supplied by the generator. ### 3. What are the different types of generators? The two main types of generators are dynamos and alternators. A dynamo uses mechanical energy to create direct current (DC) electricity. An alternator uses mechanical energy to create alternating current (AC) electricity. ### 4. What are the functions of generators? Generators can be utilized for various purposes, such as backup power during power outages, standby power for businesses, temporary power supply, permanent power, and supporting the main power supply. ### 5. What are some generator safety tips? Some safety tips for using generators include never running a generator in an enclosed space or indoors, placing the generator at least 20 feet from the house and engine, and using a generator with built-in carbon monoxide (CO) safety technology. Installing a transfer switch is also recommended in order to avoid using extension cords. If you must use extension cords, make sure that they are heavy-duty. Extra gasoline should be stored in a container that is approved by the ANSI in a cool and well-ventilated area. 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