Adding Sub-Panels to Main Panels
How to Understand Load Calculations When Adding Sub-Panels – Adding any panel or sub-panel requires careful planning, however this practice is commonplace in most commercial and industrial applications
Calculating Sub-Panel and Main Panel Load
[ad#block]Electrical Question: Can you have more than one sub panel box extend off the main panel.
- For Example:
- A Main Panel box to a sub-panel box and a 2nd sub-panel box off the 1st sub-panel box.
This electrical wiring question came from: Calvin, a Homeowner from Glendon, Alberta, Canada
See more about Home Wiring for Canada
Thanks for your electrical wiring question Calvin.
How to Understand Load Calculations When Adding Sub-Panels
- Yes, additional sub-panels may be added to existing main panels, and to an existing sub-panel as long as the connected electrical loads are fully identified so that the overall circuit load does not become overloaded.
- Adding any panel or sub-panel requires careful planning, however this practice is commonplace in most commercial and industrial applications, but again, all of the loads are carefully identified to ensure system integrity is maintained.
The Following links will assist you with Adding Sub-Panels:
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.
- Electrical Panel Circuit Listing
For more information about Home Wiring
Home Electrical Wiring
- Basic Home Wiring Diagrams with Pictures
The following may also be helpful for you:
Be Careful and Be Safe - Never Work on Energized Circuits!
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.
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