How is voltage defined in the code?

Voltage is defined in the code as the nominal RMS (Root Mean Square) or effective potential between any two circuits. This definition emphasizes that voltage represents the effective value of an alternating current (AC) voltage, which is crucial in assessing the performance and safety of electrical systems. The RMS voltage is a way to express the voltage such that it produces the same amount of heat in a resistive load as a corresponding direct current (DC) voltage. This understanding is essential for electrical design, ensuring that components are rated and operate safely within the effective voltage limits.

The specification of "nominal" indicates that this value is a standard or average representation of voltage usually found in electrical systems rather than fluctuating instantaneous values. This not only aids in system design but also aligns with industry practices regarding voltage ratings and equipment specifications. Knowing this definition allows electricians and engineers to properly assess and apply voltage-related regulations and standards in their work.