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How to Wire a Shunt Trip Breaker Wiring Diagram (DIY Guide)

Written by  Edwin Jones  / Fact checked by  Andrew Wright

Table of Contents

Tools You Need

Step 1. install shunt trip accessory to the circuit breaker, step 2. installing shunt trip circuit breaker to the panel board, step 3. understanding the shunt trip breaker wiring diagram, step 4. start wiring the shunt trip circuit breaker to the safety control, step 5. checking or testing the installed unit.

Do you want to have an additional layer of protection for your home? Are you planning to install a shunt trip breaker in your home circuit? Are you looking for a how to wire a shunt trip breaker wiring diagram?

Yes, shunt trip breakers protect your home by cutting off power when activated manually or by your sensor. Although it’s not required, it ensures that power is switched off when the sensor is triggered. These sensors could be smoke detectors, fire alarms, or even a manual emergency stop button.

If you intend to add a safety system, I highly recommend reading through the steps below to know what to expect when installing this accessory.

These are the tools and items you need to get started:

• Shunt trip accessory designed for your existing circuit breaker model .
• A circuit breaker is compatible with your shunt trip accessory if your current breaker isn’t compatible with any shunt trip accessories.
• An emergency stop switch if you want to install a kill-switch button.
• Screwdrivers of various tips and sizes as required in your electrical system
• A Shunt trip wiring diagram as your wiring guide
• Insulating gloves and eye protection

Not all circuit breakers accept shunt trip accessories. In fact, different breakers may require specific shunt trip accessory models. Some breakers also have a built-in shunt trip accessory—all you need is to wire and connect to your circuit to activate it.

Furthermore, some circuit breakers are only intended to have shunt trip accessories installed from the factory. So, before purchasing a shunt trip accessory, it’s highly recommended that you review what make and model of breaker you have. That way, you know what your options are before installation.

If you have a compatible system, you still need a shunt trip circuit breaker wiring diagram to ensure correct installation. However, do not just download any chart from the internet. For example, if you have a Square D branded circuit breaker, you need a Square D shunt trip breaker wiring diagram.

Before beginning installation, ensure that everything you need is within your reach. Also, always think of safety first!

Step-By-Step Guide to Wire a Shunt Trip Breaker Wiring Diagram

First, install the shunt trip accessory to your breaker. This procedure is pretty straightforward. Open your circuit breaker using a small flathead screw. Insert the insulator into its right place, and feed the wires in the holes near the shunt trip. Secure the shunt trip to its location, and put the cover back to the circuit breaker. And you’re done!

You can watch this video by Aaron CBIONE for a video guide on installing a shunt trip to the circuit breaker.

Note: Different makers have different installation processes. It’s best to refer to the manual guide provided in your circuit breaker.

Once the shunt trip accessory is connected to your circuit breaker, you need to connect it to your panel board as the main circuit breaker. Before installing this device, ensure that your system has no power.

If you’re not sure, it’s best to consult a professional electrician to avoid any accidents.

Once ready, open your panel board using your flathead screwdriver and plug in your shunt trip circuit breaker into the main power supply. Connect the mainline and the supply wire to the circuit breaker, then proceed to the next step.

Before wiring your shunt trip breaker to your safety control system or switch, you need first to understand its wiring diagram. This is a crucial part of the installation—that’s why you can’t skip it and need to be more careful with it.

Take a look at this recognizable wiring diagram made by Sikandar Haidar of Electriconline4u as a typical example.

Note: This sample diagram is simple and easy to follow. However, different systems may require other designs. Refer to the charts provided with the shunt trip, safety control system, or switch before starting. If you’re unsure, it’s best to consult a professional.

Using the sample above, connect one wire of the shunt trip to the neutral connection, then attach the other wire to the kill switch. Place a wire on the other side of the terminal of the kill switch through the supply connection.

With this, you now have a kill switch you can use to trip your electrical system’s main breaker quickly.

Pro Tip: Place the kill switch in an accessible area like near an emergency exit, so if a problem occurs, you can easily access it.

After installation, turn on or reconnect the power source to your main breaker panel . Flip the shunt trip circuit breaker on to begin testing your work.

To test your installation, press the kill switch. The shunt trip circuit breaker should immediately trip after pressing the kill switch. If it is not tripped, then there is something wrong with your installation.

Although not a requirement, having a shunt trip breaker in your residence provides an additional layer of safety. This is an excellent option if you have sensors in your building, like smoke detectors or fire alarms.

In case of emergencies, like flooding or sprinkler activation, you can also cut the power source by hitting the kill switch. This can prevent any shorts or accidental electrocutions because no power is supplied to your outlets.

So, what do you think of the installation process? Is it easy enough to DIY? Would you do this on your own? Remember to follow how to wire a shunt trip breaker wiring diagram. If you have any questions, feel free to reach out in the comments below.

I am Andrew Wright. With 8 years of experience designing, installing, and maintaining electrical power systems. I love my job, and I have always wanted to offer others the necessary help so they can take care of their houses.

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Wiring diagrams for masterpact nt circuit breakers, additional wiring information for masterpact nw nt circuit breakers.

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Wiring Diagrams

Markings for Push-In Type Terminals

Markings for ring terminals.

Spring-Charging Motor

Spring-Charging Motor 440/480 Vac (380 Vac Motor + Additional Resistor

The bypass circuit through terminal C2/A2 is only momentary duty for 0.5 sec. For continuous duty, use the communications command.

Connection of the Communications Option

Wiring of the COM varies with available options. See Wiring Diagrams for the COM Option .

Induced voltages in the circuit at terminal C2 and/or A2 can cause the shunt trip or shunt close to not work properly. The best way to prevent the induced voltages is keep the circuit to terminal C2 and A2 as short as possible. If it is impossible to keep the circuit less than 10 feet (3 m), use an interposing relay near terminal C2 or A2.

See Connection of the Communications Option .

Wiring of the COM Option (Modbus BCM ULP and CCM Modules

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Square D Shunt Trip Circuit Breaker Wiring Diagram

Square D shunt trip circuit breaker wiring diagram is essential for anyone who wants to understand the intricate workings of this type of electrical device. This diagram provides a visual representation of how the shunt trip mechanism works, making it easier to understand and troubleshoot if any issues arise. In this article, we will delve into the details of the Square D shunt trip circuit breaker wiring diagram, exploring its components, functionality, and importance. At its core, a shunt trip circuit breaker is designed with an additional trip coil that can be activated by a remote signal. This signal could be anything from a push button to a smoke detector, depending on the specific application. The shunt trip mechanism is used in situations where it is necessary to remotely interrupt the power supply to a building or specific area, such as in the case of a fire emergency. In such a scenario, the shunt trip circuit breaker would receive a signal from the fire alarm system, causing the trip coil to activate and immediately cut off the power supply, preventing potential hazards. The Square D shunt trip circuit breaker wiring diagram is a crucial tool for electricians and engineers, providing a clear understanding of how the various components of the circuit breaker work together to ensure safety and functionality. This diagram includes detailed information on the different types of connections, such as the main line connections, shunt trip connections, and control circuit connections, among others. Understanding the wiring diagram can also help technicians troubleshoot any issues that may arise, saving time and effort in the long run. In conclusion, the Square D shunt trip circuit breaker wiring diagram is not only informative but also a valuable resource for anyone working with these complex electrical devices. Its clarity and detailed representation make it an essential guide for ensuring the proper functioning and safety of buildings and their occupants.

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Square D shunt trip breaker wiring diagrams are an essential tool for any electrical contractor or installer. These diagrams provide a clear and concise overview of the wiring and connections between the breaker and the electrical equipment. They are also an excellent reference point when troubleshooting an issue with a shunt trip breaker.

What is a Shunt Trip Breaker?

A shunt trip breaker is a specialized type of circuit breaker that is designed to trip the breaker when a current is detected on a remote circuit. This type of breaker is commonly used for emergency lighting, fire alarm systems, and other equipment that needs to be shut off in the event of an emergency. The shunt trip breaker is triggered by a voltage or current signal from an external source, such as an emergency lighting control system, fire alarm system, or other device.

Why You Need a Square D Shunt Trip Breaker Wiring Diagram

A Square D shunt trip breaker wiring diagram is essential for any electrical contractor or installer that is working with this type of breaker. This diagram provides a clear and concise overview of the wiring connections and power requirements for a shunt trip breaker. In addition, the diagram can be used as a reference point when troubleshooting an issue with the breaker or when making modifications or repairs.

How to Use a Square D Shunt Trip Breaker Wiring Diagram

Using a Square D shunt trip breaker wiring diagram is simple. Simply follow the diagram to connect the breaker to the power source and the desired equipment. Make sure all connections are secure and that the breaker is properly rated for the current and voltage of the system. Once all connections are made, the breaker should be tested to make sure it is working properly.

Square D shunt trip breaker wiring diagrams provide a clear and concise overview of the wiring and connections between the breaker and the electrical equipment. These diagrams are essential for any electrical contractor or installer, and are also a great reference point for troubleshooting any issues with the breaker. With the help of a Square D shunt trip breaker wiring diagram, any electrical project can be completed quickly and safely.

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