What is the maximum length allowed for a circuit run before voltage drop occurs?

The maximum length allowed for a circuit run before voltage drop becomes a concern is typically around 100 feet. This standard length is used because as electrical current travels through a wire, it encounters resistance, which can lead to a voltage drop. A drop in voltage beyond an acceptable level can affect the performance of electrical devices, causing them to operate inefficiently or even malfunction.

When designing electrical circuits, especially in residential or commercial settings, a maximum length of 100 feet is often recommended to maintain acceptable voltage levels. This ensures that electrical devices receive adequate voltage for their operation, which is crucial for both efficiency and safety. If circuits exceed this length, measures should be taken to either increase wire size (using a lower gauge wire) or to use additional circuits to mitigate excessive voltage drop.