Definition
An electrical control system used in multi-engine airplanes that automatically balances the electrical output of two or more alternators or generators so each one carries an equal share of the total electrical load.
Plain English
A system that makes sure each generator or alternator on the airplane is doing its fair share of the work, so one isn't overworked while another sits nearly idle.
Context Anchor
Seen in aircraft electrical system discussions, especially for airplanes with more than one alternator or generator supplying power.
Derivation
Parallel' here means connected side-by-side to feed the same electrical bus, rather than one after the other. 'Paralleling' is the act of bringing two power sources online together so they share the load evenly.
Why Pilots Care
Balanced load sharing prevents one alternator from overheating or failing early while keeping the battery properly charged throughout the flight.
Analogy
Think of two people carrying one heavy box. Paralleling circuitry is like the coordination that keeps both people carrying their fair share, instead of one person taking almost all the weight.
Intuition Check
Paralleling does not mean the wires are simply placed next to each other. Here it means multiple electrical power sources are connected to supply the airplane together and are controlled so they share the work.
Example Sentence 1
The twin's paralleling circuitry kept both alternators carrying an even share of the electrical load throughout the flight.
Example Sentence 2
A fault in the paralleling circuitry can cause one alternator to carry the entire load, risking overheating and possible electrical system imbalance.