What Is a Tamper-Resistant Outlet?

A tamper-resistant outlet looks very similar to a regular electrical outlet at first glance, but it includes a small yet vital safety feature: spring-loaded shutters inside the slots. These shutters remain closed unless equal pressure is applied to the hot and neutral slots at the same time, such as when plugging in a standard electrical plug. If a child tries to insert a paper clip, key or any other object into just one slot, the shutters won't open, preventing contact with live electrical components.

This May Also Interest You: Different Types of Electrical Outlets

This simple mechanism makes TR outlets a reliable, childproof outlet solution. They're particularly useful in homes with young children, who may be curious about electrical outlets. According to the Electrical Safety Foundation International, thousands of children each year suffer electrical burns and shocks from inserting objects into unprotected outlets. Installing tamper-resistant receptacles can significantly reduce these risks.

What Does a Tamper-Resistant Outlet Look Like?

Visually, a tamper-resistant outlet looks almost identical to a traditional two- or three-prong wall outlet. The difference is often subtle. In some cases, you might see a small “TR” embossed on the outlet faceplate, which stands for “tamper resistant.” The shutters are internal, so they’re not obvious unless you look closely or attempt to insert an object.

From a functional standpoint, plugging a device into a TR outlet might feel slightly different than using a conventional one. There may be a small amount of resistance as the shutters open when the plug is inserted. Once the prongs are aligned correctly, the plug slides in as it normally would.

When Are Tamper-Resistant Outlets Required by Code?

Yes, tamper-resistant outlets are now required by the National Electrical Code (NEC) in most areas of the United States. Since 2008, the NEC has mandated that all new residential construction use tamper-resistant receptacles in specific areas such as living rooms, bedrooms, kitchens and bathrooms — essentially any area that's accessible to children.

These requirements have expanded over time. The 2017 NEC update extended the tamper-resistant requirement to include places like preschools, daycare facilities and certain commercial locations. Local adoption of the NEC may vary, but in general, most building codes now require TR outlets in newly built or renovated homes and businesses.

For homeowners updating old outlets or adding new ones during a remodel, it’s a good idea to check local electrical codes or consult with a licensed electrician. Even when not required, tamper-resistant outlets offer an easy and affordable way to upgrade your home’s safety features.

More Related Articles:

• All Homeowners Should Know These Electrical Terms

• How Much Do Electrical Repairs Cost? A Comprehensive Guide

• Why U Trippin’? 3 Reasons Your Circuit Breaker Trips

• 15 Ways to Save On Your Electric Bill

• Socket to Me: How Much Does It Cost to Install or Replace Electrical Outlets?

Do I Need a Tamper-Proof Electrical Outlet?

The main reason to install a TR electrical outlet is to prevent accidental shocks and improve safety. While plastic outlet caps and other aftermarket childproofing devices have been used in the past, they're often removed, lost or improperly reinstalled. Tamper-resistant outlets provide a built-in safety solution that doesn’t rely on external parts.

They also help eliminate the need for constant supervision or reminders to keep unused outlets covered. Once installed, a tamper-resistant receptacle protects automatically without any additional effort or maintenance.

Beyond child safety, these outlets also add peace of mind in environments where foreign objects might accidentally come into contact with live slots — like schools, clinics and busy public spaces. Because they help prevent contact with electricity unless a proper plug is inserted, they minimize the risk of electric shock and related injuries.

Safety Outlets: Cost and Installation

Tamper-resistant outlets are typically only slightly more expensive than standard outlets, often costing between $3 and $9 (CAD 4.18 to CAD 13) per unit. Installation is usually straightforward and can be handled by a qualified electrician or a confident DIYer with basic electrical knowledge.

Replacing a standard outlet with a TR version involves shutting off the power at the breaker, removing the old outlet and wiring in the new tamper-resistant receptacle. If you're unsure about electrical work, it's always best to consult with a licensed professional.

By choosing tamper-resistant outlets for your home or office, you’re making a smart move toward a safer space, especially if you have kids or expect young visitors. These outlets might not look much different, but their role in preventing accidents is significant.