European Schematics - controlparts We specialize in relays and controls made by Klockner Moeller and Siemens. These parts are found in most european-made machinery, and american electricians often find the electrical drawings difficult to understand. The purpose of this page is to help you understand the various symbols. Here are 2 sample German electrical schematic drawings.[PDF] A Global Reference Guide for - idc-online common schematic/wiring diagram symbols used throughout various parts of the world. The graphical symbols were taken from the following standards: BS 3939. EEMAC E14-3. CENELEC EN 50 013. IEC 617-1 to 617-8. DIN 40700 to 40717. NEMA ICS 1. The following tables describe the device and show the symbol by area of usage.