Wiring manufacturers came out with this as a substitute for 12/3 and 14/3
when those circuits will be used for bedrooms protected by arc fault circuit
interrupter breakers. Instead of a shared neutral for two circuits, you
would now have a separate neutral for each, but one common grounding
conductor. I'm not sure how much this stuff is used by contractors even
though it can save on labor costs.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.