Main Electrical Panel, Subpanels and Circuit Breakers

Once electricity enters your home through the meter, it is distributed to the house via the mail electrical pane, subpanels and circuit breakers or fuse. Here I explain how electricity is branched to the house and all the electrical appliances, lights, receptacles, appliances through wiring.

The main electrical panel is mounted just beside the electric meter. It receives the 3 electrical wires (2 Hot and 1 Neutral) and routes electricity to the subpanels through wiring. The main panel also includes device (Often circuit breaker) to disconnect power supply to the house in case of emergency.

A circuit breaker is basically a switch that may be shut off manually or may get tripped automatically by any failure in the electrical or wiring system. Breakers often get tripped because of overload. A fuse is an alternative to circuit breaker.

PS: All circuits in a house should be grounded for safety.

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Electrical Panel

Maximum amperage delivered by a service panel at one time is marked on the main breaker. A 100-amp main is good enough for all electrical need for most homes; however, 15-amp and 200-amp are also installed in many homes. These can handle plenty of capacity. 60-amp or less is not recommended.

Circuit breakers are rated for the type of wire and load required by its circuit. For most home lighting and receptacle circuits, 15-amp and 20-amp is good.

Larger-capacity circuit breakers are used for higher wattage appliances such as air conditioner, electric ovens, electric water heaters, electric clothes dryers etc. These large breakers are often connected to secondary panels (subpanels) that have their own set of circuit breakers. These subpanels may be mounted away from the main panel.

Receptacles in kitchen, bathroom, and outdoor receptacles need to be properly grounded under the norms of GFCI. This is because these areas are more prone to moisture and there need for more safety and precaution.

→ Home Electrical Basics
→ Glossary of Electrical Terms
→ How Home Electrical System Works
→ Basic Electrical Circuit: Branch Circuits and Wiring System
→ Electrical Wiring and Circuitry: Understanding the Basics
→ Electrical Grounding
→ Understanding Electrical Meter
→ Electrical Tools
→ Mapping and Wiring House Electrical Circuits
→ How to Trace a Short Circuit or Overload
→ How to Safely Test Electrical Circuit
→ Energy Star (Energy Efficiency and Environmental Protection)
→ How to slash and lower electric bills
→ How Solar Panels Work to Generate Electricity
→ Do it Yourself Home Repair and Maintenance
→ Top Ten Essential Home Tool Kit for Home Owners
→ Home Improvement Tips
→ 101 Home Improvement

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How Home Electrical Wiring System Works

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