What is the nomenclature for a Key Enabled Chelsea Switch?

In order to order a key enabled Chelsea switch, one must do the following:

1.  Specify the part number of the Chelsea switch.

2.  Add "KCE" to the end of the Chelsea switch's part number.

3.  Order the key enable switch.

The end result for a two button chelsea with white plate and buttons beside a key enabled switch that mimics that would be the following:

CH2 BWH PWH KCE

KE PWH