Project - Analysis of a practical automotive wiring circuit

Answer-1.  Major elements in the above automation wiring diagram are-

                 Genarator, Battery, Ignition coil, Ammeter, Foot selector switch, Breaker, Fuse, Current and voltage regulator etc.

Answer-2.  I. Battery- Batteries are small essential components to operate devices. It is one of the key components in daily life. A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material(electrode) to another, through an external circuit.

                   II. Fuse- Fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuses work on the principle of the heating effect of the current. Its made up of thin strip or strand of metallic wire with noncombustile material. This is connected between the ends of the terminals. Fuse is always connected in series with the electrical circuit.

                   III. Breaker- A circuit breaker is an electrical safety device designed to protect on electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire.

Answer-3. Given-

                 Total load(I)=10A

                 Voltage(V)=30V {since typical car battery voltage is 30V}

                 we know-

                 P=V*I= 300kw

                 Fuse Rating= (P*1.5)/V= (300*1.5)/30= 15A

                 The fuse rating should be 15A.

Answer-4. Given-

                 I=10A

                 P=500W

                 we know-

                 V= P/I= 500/10= 50V

                 C= I*T= 10*1=10Ah

                 voltage and capacity for this battery should be 50V and 10Ah.

Answer-5. Every light is connected in a parallel combination. The individual currents add up to the total current.

                  Generator is connected with current voltage and regulater in parallel combination.

Answer-6. Starter is connected in series line because continuous current flows through it. 

                 Ammeter is connected in series, it is a device which measures the amount of current flowing in a circuit. It is a very low resistance device.