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This set of questions covers practical aspects of electrical installation, focusing on socket outlets and single-phase motor control. Below are the solutions and explanations for each part. Question 6: Socket Outlet Installation a) Wiring Diagram for a 3-Pin Socket Outlet Connected to a Distribution BoardBelow is a simple wiring diagram: The distribution board supplies three wires: Live (L), Neutral (N), and Earth (E). These wires are connected to the corresponding terminals of the 3-pin socket outlet. Diagram: Circuit diagrams aren't available yet, but we're nearly wired up. Coming soon! Description: Live wire (L) connects to the right terminal (when facing the socket). Neutral wire (N) connects to the left terminal. Earth wire (E) connects to the top (larger) terminal. b) Function of Live, Neutral, and Earth WireLive Wire (L): Carries current from the distribution board to the appliance. Usually colored red or brown. It is the source of electrical energy. Neutral Wire (N): Completes the circuit by carrying current back to the distribution board. Usually colored black or blue. Maintains the potential difference and allows current flow. Earth Wire (E): Provides a path for fault current to flow safely to the ground. Usually colored green or yellow-green. Protects users from electric shock by preventing exposed metal parts from becoming live. c) Importance of Earthing in Internal InstallationsSafety: Prevents electric shock by ensuring that any fault current is safely conducted to the ground. Protection of Equipment: Reduces risk of damage to appliances due to voltage surges or insulation failure. Fire Prevention: Helps prevent electrical fires caused by leakage currents or short circuits. Regulatory Compliance: Required by electrical codes and standards for safe installation. Question 7: Industrial Installation Single-Phase Motor a) Wiring Diagram of a Single-Phase Motor Controlled Using a StarterA typical single-phase motor installation includes: Distribution board supplying Live and Neutral. Starter (such as DOL starter or ON/OFF switch). Motor terminals. Diagram: Circuit diagrams aren't available yet, but we're nearly wired up. Coming soon! Description: Live wire passes through the starter to the motor's live terminal. Neutral wire connects directly to the motor's neutral terminal. Earth wire connects to the motor's body for safety. If you need further details or explanation for the starter type, please specify (e.g., DOL starter, push button, etc.). (责任编辑：) |