The double Step washers supplied with WBT pole terminals and RCA sockets are inserted between the terminal or socket body and the mounting plate or cabinet wall. They have several functions:

• They insulate the connection terminal from the respective mounting plate.
• They ensure that the terminal will not twist when tightening the counter nut.
• They provide pole identification because they are colour coded.

When installing the pole terminals, the turns should be made in 45° steps. In this way, the entry point for the connection cable on fully insulated pole terminals can be aligned so that the cabling can be comfortably achieved even in narrow spaces.