Symbols of lamb, line wire,earth wire and neutral wire

Here are the symbols for the electrical components:

• Lamp (Light bulb): $$\text{---}\circ\text{\texttimes}\circ\text{---}$$ or $$\text{---}\circ\text{\Large\textasciicircum}\text{---}$$
• Line Wire (Phase Wire): $$\text{---}$$ (Often labeled 'L' in diagrams)
• Earth Wire (Ground Wire): $$\text{---}\text{\textbar}\text{\textbar}\text{\textbar}$$ (The three decreasing parallel lines represent the earth connection)
• Neutral Wire: $$\text{---}$$ (Often labeled 'N' in diagrams)