What term describes non-standard abbreviations used in electrical drawings?

The term that describes non-standard abbreviations used in electrical drawings is "Legend." In the context of electrical drawings and schematics, a legend provides the necessary information for interpreting the symbols, abbreviations, and other notations found on the drawing. This is crucial for ensuring that anyone reviewing the drawings can accurately understand the intended design and specifications without confusion.

A legend is typically located on the drawing itself and contains explanations of symbols that might not be commonly known, which helps maintain clarity and consistency in communication among electricians, engineers, and other professionals involved in the project. By providing this reference, the legend allows for quick identification of electrical components and their functions, which is essential in a field that often utilizes specialized terminology and symbols.