Looking Good Changing Dryer Outlet From 3 To 4
This configuration did not include a dedicated ground connection.
Changing dryer outlet from 3 to 4. Industrial dryer is a type of drying machine which is mainly used for drying the materials with a. The 3 wire has two hot wires usually black and white and a ground usually green or bare copper. It wasn t until 1996 when the national electrical code nec was updated to require 4 prong dryer outlets in all new homes.
The 4 wire outlet has two hot wires usually black and red a neutral white and a ground green or bare. Due to changes in the national electrical code nec recommended wiring for electric clothes dryer outlets changed in 1996 before the change dryer outlets were 3 slot devices that accepted 3 prong cords. Changing dryer outlet from 4 prong to 3 prong.
The 3 wire was allowed by most codes before 2000 or so then the code changed to require a 4 wire outlet. Nearly all homes built before this time featured either a 3 prong outlet or range outlet slightly different than a typical 3 prong dryer outlet. The dryer s equipment ground case ground was connected to the neutral conductor in the dryer cord and the household circuit.
Existing homes may still use 3 prong outlets as the nec changes are limited strictly to new homes.