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What’s the Difference Between Shunted and Non-Shunted Sockets?

When it comes to the term shunted in the lighting industry, the idea conveyed is “connected” or “joined.” Shunted sockets have electrical contacts that are internally connected. As such, the sockets operate through a single track that allows transmission of electrical current from the ballast, through the socket (also called the tombstone), and to the lamp’s pins. At HH Florescent & LED Products, we offer an extensive array of dependable fluorescent lighting products, including shunted and non-shunted sockets, for various lighting applications.

Distinguishing Between the Two Socket Types
A convenient way to determine the difference between both types of sockets is as follows: A shunted socket has two holes and receives two wires. A non-shunted socket possesses four holes and can receive a maximum of four wires. Other differences between shunted sockets and non-shunted sockets are observable as well.

Non-shunted sockets have independent points of entry for the wires – or contacts – which allowed two tracks by which the current may travel. These contacts are not connected or joined.

The most reliable and safe way to determine the kind of socket you have is by using a voltage meter. These meters will indicate the type of socket by a visual or audio response. They will light up or beep or ring if the electrical contacts are shunted, or connected. Set your voltage meter to “continuity” when conducting the test.

Use Proper Caution
Using the wrong socket for a particular application can increase the potential of an early burnout or electrical short.

It is especially important to proceed with caution when installing an LED T8 lamp in an existing fixture. The sockets used in these lamps should be non-shunted in order to avoid the dangerous possibility of electrical shock and/or failure of the product. Be sure to carefully read and follow the installation instructions to avoid canceling out the fixtures UL listing – all components of the lighting apparatus must comply, including the sockets.

In order to achieve optimum functioning of your overhead fluorescent or LED lighting, it is advisable to reference the manufacturer’s brochure or specification documents to help prevent an electrical short or light bulb damage.

It is also always important to consult with a professional electrician or your fixture manufacturer to determine the type of sockets you have or should use for specific application.

Regardless of the type of fixtures and sockets that pertain to your application, our team at HH Fluorescent & LED Products is here to help. Whether you need non-shunted or shunted sockets, we have you covered.

To find out how we can assist you with your lighting requirements, call us today at 215.379.2750 or use our contact form to send us a message.

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