How To Wire Lights in Parallel? - Electrical Technology How To Wire lights in Parallel? Parallel wiring for Lighting Circuits. Connecting lighting points in parallel. but will decrease the overall resistance of the circuit especially when high current rating devices are used such as air conditioner and electric heaters. Electrical Technology says: at . Thanks for your appreciation, Reply Wiring Basics for Alternating Current | DoItYourself wwwyourself››Home AutomationParallel circuit wiring is the most common type in homes. A single circuit, provided it can handle the load, powers several things like lights, outlets and other devices. Some home appliances require their own circuit because they require a lot of power.