How to Plan for a Sub Panel
Art in Missouri asks; Can I branch out to another small panel board from the main panel board to separate some appliance circuits? Planning for an Electric Sub Panel.
Sub Panels for Expanding Circuit Capacity
Electrical Question: Can I branch out to another small panel board from the main panel board to separate some appliance circuits?
- I’m planning to branch out one of the 30amp circuits in the main panel board.
- I would like to add a new panel board.
- The Circuits that will be installed:
- One 30amp breaker as the main disconnect.
- Two 20amp breakers for branch circuits.
This electrical question came from: Art, from Kansas City, Missouri.
Thanks for your electric wiring question Art.
Adding a Sub Panel
Application: Adding a Sub Panel.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor.
Tools Required: Electricians pouch of hand tools and the various power tools necessary for installing the sub-panel.
Estimated Time: Depends on the type and size of the panel and available access to the project area.
Precaution: Any existing electrical wiring within the immediate area that may interfere with the installation of the sub panel should be identified and turned OFF and Tagged if necessary. Working in an electric panel is dangerous due to arc flash hazards and the possibility of electric shock.
Notice: Installing additional electrical wiring and a sub-panel should be done according to local and national electrical codes with a permit and be inspected.
Planning a Sub Panel Installation
Identifying Panel Circuits and Connected Loads
- Why Sub Panels are Installed
- Sub Panels are installed and used for several purposes including expanding the physical circuit capacity of the main electric panel.
- Planning for a Sub Panel
- Planning for the sub panel is extremely important for the project to be successful.
- All of the potential circuit loads for the new sub panel need to be identified.
- The Capacity of the Main Electrical Panel
- Main The electrical load capacity of the main electrical panel must be able to support the existing loads and the proposed additional loads.
- The Size of a Sub Panel
- Once the additional circuit loads have been identified then the amperage size of the sub panel may be determined.
- The Size of the Wire or Cable for the Sub Panel
- The size of the sub panel will determine the required size of electrical cable to be installed and the circuit breaker for the feeder circuit.
- It is best to have a qualified electrical contractor install a sub panel project.
- Sub panels should be installed by permit and receive the required inspections to ensure the project is installed correctly.
More about Electrical Wiring
House Wiring Circuits and Circuit Breakers
- This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.
Home Electrical Circuit Breakers
- A guide to home electrical circuit breakers and how they work to protect your electrical wiring. When properly installed, your home electrical wiring is protected by a circuit protection device.
Basic Home Wiring Diagrams
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
The Safest Way to Test Electrical Devices and Identify Electric Wires!The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
The Quickest Way to Check for Faulty Electrical Wiring!The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.
Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..
The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.
|More articles about Electrical Wiring and Home Electrical Wiring:|
|« Previous||Next »|
|How to Correct 3-Way Switch Wiring||Installing Electrical Wiring for Outlets|