![]() ![]() ![]() MCB can be reset as a normal switch just flip the knob to ON.ĭifference between MCB and FUSE? Which one is preferable?īoth devices have the same function they are used to protect the electrical system from over current and overload, but they are different in both construction and operation. When the current through the MCB reaches the rated trip current value it trips and breaks the circuit. ![]() Miniature Circuit Breaker or MCB is an electromechanical device used to protect an electrical circuit from an overcurrent due to short circuit or overload. The output from the energy meter is connected directly to the main switch. The main switch is the master switch which isolates all the house electric circuits from the power supply. In electrical systems earthing has an important role in protection, it discharges fault current and prevents electric shocks, damage of appliances, etc.Īn isolator is a mechanical switching device used for isolating a circuit or equipment from the power source. The blue ones are travelers that might be in the switches at both the top and bottom of a staircase to control the same light.Why earthing is required in electrical wiring? Blue and yellow wires, although not usually found in non-metallic (NM) cable, are sometimes used as hot wires in an electrical conduit.Bare copper wires are the most common type of grounding wires.Green wires can only connect to other green wires but can still be live if the electrical system is faulty. Green wires connect the grounding terminal in an outlet box and run it to a ground bus bar in the electrical panel, giving current a place to escape to the ground in the event a live wire touches metal or another conductor.The tape just lets you know that the white wire, which is normally neutral, is being used as a hot wire instead. White wires wrapped in black or red electrical tape are also hot wires.Don’t let the “neutral” part fool you because they can still carry a charge-especially if the current load is not balanced. White and gray wires are neutral wires that connect to the neutral bus bar, which attracts current and carries it throughout the house.Red wires are also hot wires used to interconnect smoke detectors, so that if one alarm goes off, all the others do as well.Black wires or “hot wires” carry live electrical loads from the electrical service panel to an outlet, light or other destination.The following is sort of an electrical wire types chart: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |