Arcolectric Rocker Switch Accessories Protective Rocker Switch covers suitable for Arcolectric single or double pole rocker switches. The covers comprise stock no's 7958209 and 7958199 for the single pole versions and stock no's 7958192 and 7958195 for the double pole version. The covers are suitable for use with rocker switches that have the following (data sheet) body code letters; A, L, Q, or T.