We need to entrust electrical installations to the experts. Even an everyday operation like installing an electrical outlet can create a safety hazard when done improperly.
Hubbell has been committed to supporting industry professionals since our founding over 130 years ago. We constantly look for ways to make your work easier, faster, and safer.
Our recent innovations help eliminate potential safety problems, like loose terminations. Here’s what you need to know about safe terminations in electrical connections and how our products help.
What are the torque standards? NEC 110.14(D)
The National Electrical Code (NEC) is a required set of guidelines for electrical wiring and installations in the United States. It is published every three years and enforced by the National Fire Protection Association (NFPA).
A new code section, NEC 110.14(D), has been introduced to address tightening the terminal screws of wiring devices to a specific torque. The updated code requires that a calibrated torque tool be used to achieve indicated torque values for equipment terminals. This rule applies in all cases except those in which the manufacturer provides an alternative method in their installation instructions.
States abiding by the 2017 code must utilize a calibrated torque tool when device installation instructions provide a tightening torque numeric value. Those states on 2020 code or later now must follow the expanded 2017 rule of utilizing an “approved means” to achieve the necessary torque value. Most device manufacturers always include a numeric torque value. This means electricians are now responsible for obtaining expensive torque drivers (or other acceptable calibrated equipment), adding time and expense to every installation.
Our screwless termination solutions
Our screwless termination solutions eliminate the need for torque equipment and multiple inspections. Years ago, we introduced SNAPConnect® modular devices that facilitate easy change outs and prewiring at the rough-in phase using connectorized pigtails.
We recently launched the first ever patented EdgeConnect™ spring clamp terminal devices. The EdgeConnect solution allows users to simply insert their wires, press the color-coded plungers, and complete the terminations in less than half the time of a traditional screw terminal device. As heat and vibrations increase over time, the spring clamp presses into the conductor even more firmly to actually tighten over time, rather than relaxing.
Both SnapConnect and EdgeConnect termination styles are available across the breadth of our wiring device product lines and will save you time and money. They eliminate the need for any torque requirement equipment or concerns!
The background: types of electrical terminations
Getting confused about all the termination styles available? Here is a breakdown.
Electrical installations are commonly made by screw terminations, a type of electrical connection where a wire is held by the tightening of a screw:
Side wiring
Side wiring a device involves attaching wires using the side terminal screws. A pair of pliers is used to bend the wire, creating a “fishhook”, and the hook is placed around the screw. Then an electrician must tighten the screw with a screwdriver. Side wiring is often preferred due to its long history of reliability on the market but is dependent on a knowledgeable electrician. (Our residential grade side wire options begin with "RR" like RR15SWWRTR and the commercial grade devices begin with "CR" like the CR20WHI)
Back wiring
During back wiring, wires are slid under the terminal clamp to the appropriate screw and then an electrician must tighten the screw. Generally, back wiring is easier as it eliminates the need to manually create the “fishhook.” However, a screwdriver is still necessary. (Our back wired options start with “BR” like the BR20WHI or “DR” for Decorator Face, DR20WHI)
Push-in terminations
Also known as “push wire” or “back stab” terminations, push-in terminations allow for tool-free termination of conductors. In push wire terminations, wires are simply inserted into a connector or terminal block that grips the wire. However, these terminations are not as secure and may relax over time. They only allow for 15Amp/14AWG wire (the hole will not allow for larger conductor as means of preventing miswiring with 12-10AWG). If miswiring occurs there is no way to redo the termination. This style is frequently used in residential DIY settings. Look for our RRD15W product family.
Modular devices
Modular devices are also known as connected/connectorized or pigtailed devices. These require finger-safe housing on the conductors with wire leads to create a “pigtail” which must be ordered separately (one is needed for every device). The modular devices then have a terminal area for the connector to be inserted, like our SnapConnect.
Screwless terminations
Screwless terminations are relatively new to the market and poised to eventually become the preferred wiring device installation methods.
Spring termination
A device containing a terminal with a spring action clamp or spring mechanism where the stripped end of a conductor is inserted and a lever applies pressure, like our EdgeConnect solutions.
What torque has to do with screw terminations
For screw terminations, back wiring and side wiring, proper torquing is crucial to ensure reliable and safe connections and prevent electrical fires. Proper torque keeps electrical connections tight and secure to prevent mechanical and electrical failures and ensure efficient operation of electrical systems over their lifespan.
Improper torque in electrical terminations can lead to a range of issues that compromise the safety, efficiency, and longevity of electrical systems. Both under-torquing and over-torquing have consequences.
Under-torquing can result in loose connections, leading to arcing, overheating, and potential electrical fires. Over-torquing can damage electrical components, such as stripping threads or cracking device housings, compromising the integrity of the electrical system.
SNAPConnect and EdgeConnect technology eliminate torque concerns
SNAPConnect and EdgeConnect are specific technologies for electrical devices that simplify and enhance the reliability of electrical connections. These technologies are used in receptacles and switches. They are designed to provide secure and consistent connections without traditional screw terminals.
SNAPConnect receptacles feature a modular wiring device system that simplifies installation and maintenance. SNAPConnect devices use a snap-in mechanism that doesn’t require manual torquing with a screwdriver or torque wrench. The design ensures that the correct amount of force is applied when the wires are inserted and snapped into place, adhering to the manufacturer’s specifications for a secure connection.
The EdgeConnect Screwless Termination system is another advanced wiring device technology. Strong steel springs inside grip wires tight for a reliable connection. There are no screws, and no screwdrivers or torque wrenches are required, so there are no torque issues. Simply insert the wire and engage the lever.
The foolproof and long-lasting connection ensures a high-quality result regardless of the installer's level of training. This screwless termination system also reduces termination time. With spring termination preventing strand relaxation, EdgeConnect technology revolutionizes electrical connections.
Screwless terminations are a modern alternative to traditional wiring methods, offering efficiency and reliability and eliminating concerns over proper torque.
Tips and tricks for consistent torque on screw terminals
Achieving consistent torque during electrical installations is crucial to the safety, reliability, and longevity of electrical systems. Here are some practical tips and tricks to help maintain consistent torque applications:
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1. Use quality torque tools
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2. Standardize procedures
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3. Use torque indicators or digital tools
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4. Implement quality checks
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5. Understand and adjust for environmental factors
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6. Use correct techniques
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7. Or just use SNAPConnect or EdgeConnect instead!
Contact Us
Contact us today to learn more about our screwless termination technology, including SNAPConnect and EdgeConnect.
