Recreational Vehicle (RV) Technician Practice Test

What is the symbol used to denote a ground in electrical schematics?

1. G

2. S

3. J

4. C

The correct answer is: J

The symbol used to denote a ground in electrical schematics is typically represented by a specific graphic rather than a letter, with variations depending on the context of the schematic. The common ground symbol resembles a downward-pointing triangle with lines radiating downward. In most standards, the letter "G" is used to denote ground as well, but this can vary. The reasoning behind using "G" for ground is straightforward: it is the first letter of the word "ground,” making it intuitive for understanding and reference in schematics. This consistency helps technicians and electricians easily identify grounding points within electrical diagrams, which are crucial for safety and functionality. Using an independent symbol or designation for ground is important as it helps in distinguishing it from live or phase wires, which can prevent errors in judgment during installation, maintenance, or troubleshooting of electrical systems. Understanding these symbols is essential for anyone working in RV maintenance or any electrical field to ensure safe practices and proper connections.