Comprehensive Electrical Symbols Legend for Construction Plans

This drawing provides a standardized electrical symbols legend suitable for construction and electrical engineering projects. The legend is organized into 8 main categories: current types, conductor types, terminals and connections, contacts, electrical controls, mechanical controls, electrical machines, and grounding systems. Each symbol is accompanied by its Spanish-language descriptor, following standards including IEEE Std 315-1975 (1993) and Bolivian standards NB 303, 304, 412, and 497. The legend covers both industrial electrical components (contactors, relays, motors) and civil installation elements (light fixtures, outlets, switches). Notable inclusions are specialized symbols for three-phase systems, thermal protection devices, and various conductor representations for electrical plans. The comprehensive nature makes this legend suitable for both schematic diagrams and architectural electrical layouts.