SPT-3 is a 300 volt parallel lamp cord, the same as SP-3 but in an all-thermoplastic construction, the heaviest of the SPT light-duty cords.
SPT-3 designates a light-duty lamp cord rated at 300 volts, the same as SP-3 but built in an all-thermoplastic construction. As the heaviest of the SPT family, it provides the greatest durability among these thermoplastic light-duty cords, often with the option of a grounding conductor. The vinyl insulation and jacket offer flexibility, moisture resistance, and economy for the more demanding end of light-duty applications.
The thermoplastic construction and heaviest build distinguish SPT-3 within the SPT family and from the rubber SP-3. It suits light-duty applications that benefit from added robustness while remaining a light-duty rather than hard-service cord.
In commercial and industrial settings, thermoplastic light-duty lamp cords like SPT-3 serve lamps and small equipment within their rating. Recognizing the designation and its construction is part of identifying cord suited to the application.
Because the thermoplastic construction and heaviest build distinguish SPT-3 within the family and from the rubber SP-3, it suits the more demanding end of light-duty applications, with the vinyl insulation and jacket providing flexibility, moisture resistance, and economy.
At Windy City Wire, the focus on quality low-voltage cable and cord includes thermoplastic light-duty cord types like SPT-3. Supplying cord with appropriate construction and ratings helps customers match products to light-duty power needs in commercial and industrial settings.
SPT-3 (300 volt all-thermoplastic parallel lamp cord, heaviest)
UL (Underwriters Laboratories), which lists flexible cord types