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

By Dave Rongey - Summary:

How to Select the Right Circuit Breaker for an Electrical Panel

Current Limiting Electrical Panels and Circuit Breakers

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.

Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

» Click here to learn more about Home Electrical Wiring «
  repair electrical wiring  


Click the banner to Ask an Electrical Question:
electrical question

FAQs Frequently Asked Questions and Comments

2 Responses to “CL and NCL Panels and Circuit Breakers”
  1. 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.

  2. 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.