Voltage rating is the highest voltage that may be applied to a wire or cord for continuous service in conformance with the governing standards or specifications.
Voltage rating is the highest voltage that may be applied to a wire or cord for continuous service while remaining in conformance with the governing standards or specifications. It reflects the capability of the insulation to withstand electrical stress safely over the long term, and it is established according to the applicable standards for the cable type. Operating a cable within its voltage rating is essential to safe, reliable performance.
Because the insulation must withstand the voltage applied across it continuously, the voltage rating is tied to the insulation type, thickness, and construction. Common ratings such as 300 and 600 volts correspond to standardized constructions suited to those voltages.
In commercial and industrial systems, matching a cable's voltage rating to the voltage present in a circuit is fundamental to correct, safe application. Recognizing the rating helps in selecting cable suited to the circuit.
Because the insulation must withstand the voltage applied across it continuously, the voltage rating is tied to the insulation type, thickness, and construction, with common ratings such as 300 and 600 volts corresponding to standardized constructions suited to those voltages.
At Windy City Wire, the focus on properly rated low-voltage cable centers on the voltage rating. Supplying cable with a voltage rating matched to the application helps ensure dependable, safe performance under the voltages present in commercial and industrial circuits.
Established per governing standards such as UL and the NEC