Understanding the Appliance Parts

Discussion in 'HVAC Heating & Cooling' started by denvchr22, Dec 20, 2010.

  1. denvchr22

    denvchr22 Guest

    When using appliances in your home, every member of the household should be aware of these points.
    • Locate and remedy any condition that produces an electrical shock be sure the appliance is properly grounded before its put back into use.
    • Never use a piece of electrical appliances in a wet location or when you are wet, and never use it when touching another --rounded object such as a water pipe or even the frame of the appliance itself.
    • Always turn the appliances off before removing the plug from an outlet. Always grasp the plug and not the cord to remove it from the receptacle. If a cord disconnects from the appliance as well as from the receptacle, always plug the cord into the appliance before plugging it into the wall conversely also remove the plug from the wall outlet before disconnecting from the appliance.
    • Never run a cord over hot pipes, radiators, or other hot objects and don't allow the cord or the appliance to become wet.
    Here's the reason for using this method. If a slip occurs, the current through the body can have a direct effect on the extent of injury current flowing from the hand to the elbow, for instance, will not be as serious as that flowing through both hands since it then passes directly across the chest and heart. Keeping one hand lessens the possibilities of this. However is not recommending even this procedure. It's far safer to attach both leads and keep them off completely.
    Appliance capacitors are found in many motor-driven appliances. They act as "storehouses" for electricity, and must be discharged before handling or testing them. To avoid blowing an internal fuse used in many capacitors, discharge them with a 20,000-ohm, 2-watt wire-wound resistor. You can purchase one at any appliance parts supplier. Wrap the resistor with tape and handle it so you don't come in contact with the un insulated leads. Touching the appliance resistor across the capacitor terminals will bleed away any residual charge. After doing this, you can test it safely.
    In home appliances, the conductor is usually a wire. In some cases, it may be a bus bar, a strip of metal which carries electrical current. It is a means of conducting the current from one point to another without loss of voltage. It is a means of getting the current from the power supply to the load, the part of the circuit which actually does the work. It is at the load that power is used, and it is the appliance conductor which transports it there. Some examples of loads are appliance motors, appliance heating elements, lights and buzzers.
    When you test with the volt-ohm meter, an appliance conductor should read 0 resistances. Any break in the conductor will keep the appliance from functioning. Any change in the dimensions of a conductor, which could occur when you strip the insulation off and cut down into the wire itself, actually reduces the size of the appliance conductor. The smaller the conductor, the less current it will carry, just as a quarter-inch water pipe with a force of 100 pounds per square inch will deliver less water than a 1 -inch pipe when the same amount of force is applied. Therefore, it's necessary to use extreme care when you're attaching terminals, or handling a conductor in any way, to keep from breaking or cutting any part of the conductor.



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