Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
- 14. An electric equipment
   14.1.2. Measuring devices
   14.1.3. Technics of measurements
   14.1.4. Electric equipment checks
   14.1.5. A sound signal
   14.1.6. Replacements of safety locks
   + 14.1.7. The storage battery
   + 14.1.8. The generator
   + 14.1.9. A starter
   14.1.10. The traction relay
   + 14.1.11. Illumination system
   14.1.12. Devices
   14.1.13. The instrument panel
   14.1.14. Lamps накаливания on the panel of devices
   14.1.15. Light switch
   14.1.16. A radio receiver
   + 14.1.17. The aerial
   14.1.18. Dynamics
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Jets стеклоомывателя
   14.1.21. Washing atomizers of headlights
   14.1.22. A screen wiper and its engine
   14.1.23. Protect the car
   14.1.24. Anticreeping "immunodeficiency"
   14.1.25. Why headlights grow dull
   14.1.26. "Галогенки"
+ 14.2. Electroschemes

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14. An electric equipment

14.1. Electric equipment system

14.1.1. Introduction

At electric equipment check in engineering specifications the owner of the car faces concepts "pressure, a current strength and resistance".

Pressure is measured in Voltah (V), a current strength – in Amperes () and resistance – in Ohms (R). In the car pressure, as a rule, is meant concept pressure of the storage battery. Thus it is a question of pressure of a direct current about 12 V.Velichina of pressure of the storage battery depending on its degree разряженности and from temperature of external air can make 10–13 Century On the other hand, pressure developed by the generator for an onboard network at average frequency of rotation of a shaft of the engine makes about 14 Century

The concept "current strength" rather seldom meets in the field of a car electrical supply. The current strength is specified, for example, on an underside of safety locks and specifies the maximum current which can proceed without перегорания safety locks and, hence, without rupture of an electric chain. Everywhere, where the current proceeds, it should be shunted by resistance. Resistance, among other, depends on following factors: cross-section section of a wire, a material of a wire, current consumption, etc. If resistance too big there are functional infringements. For example, resistance of wires of a high voltage should not be too high, otherwise force of sparks on spark plugs which ignite топливовоздушную a mix sufficiently decreases and, hence, start the engine.