HAIK ELECTRIC · PROFESSIONAL REFERENCE
Electrical Symbols
A visual reference for reading power, control and component diagrams. Search 26 symbols, compare notation, and enlarge each drawing.
Read the drawing legend first
These are redrawn, simplified schematic examples, not a complete standards catalog or a building-plan symbol schedule. Contacts are shown in their normal, unactuated condition. Device tags, terminal numbers and project legends determine the complete meaning.
Ground, chassis and neutral are different concepts. A crossing is only a junction when the drawing convention identifies a connection. Do not infer conductor size or protective-device rating from a symbol.
Eaton — NEMA / IEC schematic comparison · IEC 60617 symbol database
Reference reviewed October 2026.