ask the electrician
Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

CL and NCL Panels and Circuit Breakers

How to Select the Right Circuit Breaker for an Electrical Panel

Home Electrical Wiring Video

Hooking Up a Generator to the House Panel
Using a Circuit Breaker Interlock Kit
for Backup Power

NOTE: A List of All my Helpful Videos
Will Display at the End of This Video
So Keep Watching So I Can Help You Wire it Right!

Check out my YouTube Channel:
» AskTheElectrician «
and Subscribe!

Learn more about Home Electrical Wiring
with my online Video Course:
Basic Home Electrical Wiring by Example

Current Limiting Electrical Panels and Circuit Breakers
[ad#block]Electrical Question: I have a Murray LC2040L1125 main lug center as my main service panel in my house. Main line directly from meter comes in through two pole back fed 100A main. There are extra spaces in this load center, and it currently only has 19 circuits on it, far less than the 40 that are allowed.

Does anybody have experience with this load center?
Can somebody suggest which breaker to buy?


Background: Patrick, a Homeowner from Patchogue, NY

Dave’s Reply:
Thanks for your electrical question Patrick.

How to Select the Right Circuit Breaker for an Electrical Panel

CL – Current Limiting is a mechanical design that prevents the use of some tandem breakers which may lead to exceeding the number of circuits that can be connected to the panel which could lead to an over current condition.

NCL– Non-Current Limiting is where the design of the panel will allow the use of tandem circuit breakers however you may not exceed the maximum number of circuits as specified by the panel.


House Wiring Circuits and Circuit Breakers

Electrical Panel
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 Circuits
Electric Circuit Listing
The size of the home electrical service panel is designed by calculating the square footage of the home and factoring in the code requirements for the electrical circuits that are required.

Circuit Breaker
Electrical Wiring Protection using 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.

The following may also be helpful for you:

Dave's Guide to Home Electrical Wiring:

» You Can Avoid Costly Mistakes! «

Wire It Right with the help of my Illustrated Wiring Book
Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Learn more about Home Electrical Wiring
with my Online Video Course:
Basic Home Electrical Wiring by Example

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

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 CL and NCL and Home Electrical Wiring:
« Previous Next »
Hot Light Fixtures Can Lead To A Fire Installing a Bath Exhaust Fan

FAQs Frequently Asked Questions and Comments

2 Responses to “CL and NCL Panels and Circuit Breakers”
  1. Pat taylor says:

    I own a small burger place and need to reduce the incoming voltage on two 240 volt plugs to 220 volts for a Ice Cream machine, the manufacture says it will burn out with 240 volts. what can I put in the circuit to reduce the voltage, I can do wiring to hard wire it in place if needed.

  2. Dave Rongey says:

    Pat, I would check into this. In my experience anything labeled within the range from 220 to 240 volts would all work fine as long as the power is either single or three phase accordingly. Your electrical service would need to be tested to see exactly what system your electrical utility company is providing but understand that your primary voltage will fluctuate a small percentage depending on your location. If it is found that an absolute voltage is required then consider units such as the Tripp Lite and Sola Power conditioners, here is a link that lists a few found at Grainger.
    These units are very dependable. But again, I would do some research about the acceptable voltage tolerance for your equipment.
    Pat, be careful not to get confused about the power requirements. Be sure to identify exactly what your electrical service is and then compare this to what the manufacturer is requiring. If you will be required to install a voltage conditioner then make sure that it will also meet the required power specs for the machine. The concern here is to protect your investment so that if something should go wrong that you can refer back to the fact that you provided the specified power. You may have the manufacturer review and approve the power conditioner that you select. Another tip is that Grainger has a great support team available to help you select the right power conditioner for your application.