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Choosing Electrical Panels
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Choosing Electrical Panels

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Learn about the different types of electrical panels and how each affects your home. Then, brush up on the parts of an electrical panel.

Learn about the different types of electrical panels and how each affects your home. Then, brush up on the parts of an electrical panel.

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Transcript

  • 1. By B.K. Electric Services
  • 2. • Before circuit breakers, we had fuses. • Fuses are single-use devices that interrupt a current • If a current grows too large, the metal in the fuse melts and the circuit is left unharmed. • Fuses consist of thin wire encased in heatresistant glass. • Fuses are like bridges that let electricity flow through it. • Fuses burn out if too much electricity flows through.
  • 3. Pictured: A fuse at work with an electricity shark
  • 4. • But fuses need to be replaced every time one burns out. • Since fuses are cheap, they continue to be used in the systems of cars and other vehicles on both land and sea. • However, electrical panels use more advance components, such as switches, relays, and circuit breakers.
  • 5. • Circuit breakers are like the reusable versions of fuses and work in much the same way. • Circuit breakers are part of a larger structure called the electrical panel and prevent fires by creating gaps in the circuit. • But how do electrical fires begin anyway?
  • 6. • Well, each circuit is composed of a hot wire and a neutral, or ground, wire. • The hot wire is connected to the power source. Leave this wire alone or you’ll find yourself in the hospital or morgue. • The ground is connected to the, you guessed it, ground underneath a home. • These two wires never touch so the current passes through a load, or resistor. • In the US, power is delivered at 120-240 volts, but current resistance varies from home to home. • Occasionally, something random and unfortunate happens which causes the hot wire to touch the neutral. • This causes a tsunami surge of electricity, leading to a fire.
  • 7. • Single Pole – 120 volts with a rating of 15-20 amps. The most common. • Double Pole – 240 volts with a rating of 15-50 amps. Often serve large appliances, ovens, etc. • Ground Fault Circuit Interrupter (GFCI) – protects circuits and multiple outlets. Used in rooms with high risks of electricution. • Arc Fault Circuit Interrupter – designed to turn off power when electricity arcs are detected.
  • 8. • All circuit breakers feed into a central circuit breaker panel, otherwise known as the electrical panel. • Electrical panels are found in basements or side closets. When a circuit breaker does its job, it can be reset here. • Circuit breakers are stacked and controlled by little levers marked “On” or “Off”. • Most breaker panels feature a neutral bus and grounding bar and is sealed off by a metallic panel giving access to the circuit breakers without letting loose any wires.
  • 9. Source: BuellInspections.com Source: Bullseye-Electric.Nuresponse.com Source: VitalBodies.net
  • 10. • Main breaker – usually a large double-pole circuit breaker limiting outside electricity. • Circuit breakers – stacked like building blocks in rows of 2 • Bus bars – feeds home circuits with power from electrical meter. • Neutral bus – connects to main circuit’s neutral wire. • Grounding bus bar – unites all ground wires and is connected to grounding connector.
  • 11. • Main breaker panel – installed meter and feeder cable are within range of the panel • Main lug panel – runs wires to lugs and can be used as a sub-panel. • Sub-panel – separate breaker panel for new circuits separate from pre-installed circuits.
  • 12. • For more information, – Visit us at bkelectricservices.com – Call us at 310-430-2300