Metallics MWNY1812V 18--12 Yellow Wing Wire Connector

The MWNY1812V is rated for 18 through 12 AWG conductors, which covers the standard 14 and 12 AWG branch circuit wiring in residential and commercial work plus smaller 16 and 18 AWG fixture and control leads. The yellow shell is the color code for that range, so an electrician can confirm the right connector on the job at a glance.

No. The MWNY1812V tops out at 12 AWG, so a 10 AWG conductor is outside its range and the connector will not make a reliable mechanical or electrical joint. For 10 AWG splices you need a larger connector rated to include 10 AWG, typically the next size up in the same wing connector family.

No tool needed. The MWNY1812V is a wing style twist-on connector, so the molded wings give you the grip and leverage to seat it by hand onto stripped conductor ends. That is the main reason crews pick a wing connector over a plain cone cap when they are making a lot of splices overhead or in a tight box.

Order it as Metallics MWNY1812V. That single manufacturer part number covers the yellow 18-12 AWG wing wire connector, with no finish, size, or quantity variations to choose between.

Yes, mixed-gauge splices inside the 18 to 12 AWG window are exactly what the MWNY1812V covers, so a 12 to 14 AWG combination sits in range. What decides it in practice is the total number of conductors in the splice: count them and keep the bundle within what the connector will seat on, since a yellow connector is sized for a modest conductor count rather than a large multi-wire junction.