What factor determines the electrical demand in a wiring system?

The factor that determines the electrical demand in a wiring system is the power consumed, which is measured in watts. Electrical demand refers to the total amount of electrical energy needed to power devices and systems in a given timeframe. Since watts are defined as voltage multiplied by current (W = V x I), the total wattage consumed gives a clear measure of the electrical demand on the system.

This relationship between power (watts) and the components of the electrical system helps in understanding the overall consumption and ensures proper sizing of wiring, circuit breakers, and other components to handle the load safely. In this way, knowing the wattage allows for efficient planning and operation of electrical systems.

While factors such as resistance (measured in ohms) and voltage levels do play vital roles in the functioning of a system, they do not directly determine the demand in the same way that the total watts consumed do. Water pressure is unrelated to electrical demand and applies to hydraulic systems rather than electrical ones, thus making them irrelevant to this context.