Double Pole Switch Installation

In order to control electrical loads such as heating in the picture below using double pole switch. Double pole switch consists of four terminals. And electric heating load consists of three terminals. In the second switch terminal to get into each phase line (L) and the neutral line (N). While the other two terminals each connected to two terminal heating load. One other terminal on the body burden, directly connected to the grounding line.
Electrical circuit drawings double pole switch
 a. Electrical circuit drawings double pole switch

Double pole switch wiring drawings
b. Double pole switch wiring drawings

Image channel double pole switch
c. Image channel double pole switch