Attributes . Specifically created for the residential markets, the T/R+ replaces the yellow, tan and redconnectors in the majority of field applications. T/Y+ replaces the yellow, orange, blue and graywire nuts in most applications. Use the 412 (tan) connector for wire combinations from 2 #20 to3 #10 AWG. This simplifies selection of the right connector for a wide range of wiring jobs.There?s also less inventory to manage, and a better chance you?ll have the connector you needto do every job. . Names