TA is the UL designation for switchboard wire insulated with thermoplastic over a high-temperature barrier layer.
TA is a UL designation for switchboard wire that combines thermoplastic insulation with a high-temperature barrier. The barrier layer adds resistance to heat beyond what the thermoplastic alone provides, suiting TA wire to the internal wiring of switchboards and control apparatus where elevated temperatures may be present. The designation identifies this specific insulation construction.
By pairing a thermoplastic insulation with a high-temperature barrier, TA wire performs reliably where heat would otherwise stress an ordinary thermoplastic insulation. This makes it useful in control assemblies that run warm or sit near heat-generating components.
In commercial and industrial electrical systems, switchboard wire designations like TA identify the insulation and its temperature capability. Recognizing the designation helps in selecting wire suited to the thermal conditions inside a panel or apparatus.
Because pairing thermoplastic insulation with a high-temperature barrier lets the wire perform where heat would otherwise stress an ordinary thermoplastic, TA suits control assemblies that run warm or sit near heat-generating components, with the designation identifying this specific insulation construction.
Recognizing how a high-temperature barrier extends thermoplastic insulation helps customers match TA wire to the thermal demands of commercial and industrial control assemblies.
At Windy City Wire, an understanding of switchboard wire designations, including TA, supports the selection of conductors for control wiring. Recognizing how a high-temperature barrier extends thermoplastic insulation helps customers match wire to the thermal demands of commercial and industrial assemblies.
TA (UL designation, thermoplastic with high-temperature barrier)
UL (Underwriters Laboratories), which assigns wire insulation designations