Where Are Tamper Resistant Receptacles Required By The NEC?
Tamper-resistant receptacles (TRRs) are an important safety tool that help to protect people from electric shock, fires, and other hazards that can occur when an outlet is improperly used. Tamper resistant outlets, which require two simultaneous motions to open them, are designed to prevent children from accessing electrical current by inserting objects into an outlet. The National Electric Code (NEC) sets forth requirements for these outlets in both residential and commercial settings.
Residential structures such as houses, apartments, and duplexes typically contain 120-volt receptacles, and the NEC requires tamper-resistant outlets in all dwellings, including new and remodeled homes. Most homes now have TRRs installed, as they have been required by code since 2008. These outlets must also be installed in workplaces and other areas with public access, such as schools, daycare centers, and medical offices. The NEC also requires the use of TRRs in all construction sites.
120-Volt Receptacles
Most residential dwellings use 120-volt receptacles, which are powered by a single hot wire and neutral wire. These 120-volt receptacles must include a ground fault circuit interrupter (GFCI) and also be protected by a TRR. The TRR ensures that the current remains off even if the ground fault circuit interrupter is not engaged. The main purpose of a TRR is to prevent electrical shock or fire resulting from the improper insertion of foreign objects.
Commercial Structures
In commercial structures, TRRs are mandatory in all areas with public access, such as hallways, stairwells, and bathrooms. These receptacles are also required in computer labs, medical offices, hospitals, and other healthcare facilities. The NEC requires that these outlets be installed in accordance with the manufacturer's instructions and that they meet the UL 498A safety standard.
Construction Sites
The installation of TRRs is also mandatory at construction sites. Construction personnel should use this type of outlet when working on electrical systems in order to eliminate hazards such as electrocution and possible fires. All outlets must be installed according to the manufacturer's specifications and comply with the UL 498A safety standards. It is important to note that all outlets must be inspected by a qualified professional before any power is supplied to the building or site.
Conclusion
It is important to understand where tamper resistant receptacles are required by the NEC in order to ensure that they are being used properly and safely. TRRs are essential in both residential and commercial settings, and they must also be installed at construction sites. Adhering to the NEC's guidelines is necessary for protecting people from the potential risks of improperly used electrical outlets.
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