By Augustine Yvonne. Electrical Wiring. Publised at Thursday, September 07th 2017, 06:58:27 AM. Line diagrams, also called “schematic” or “elementary” diagrams, show the circuits which form the basic operation of the controller. They do not indicate the physical relationships of the various components in the controller. They are an ideal means for troubleshooting a circuit.
By Charline Rodrigue. Electrical Wiring. Published at Wednesday, January 17th 2018, 01:16:54 AM. • Black represents ungrounded line, load and control conductors at line voltage. • Red represents ungrounded AC control conductors, at less than line voltage. • Blue represents ungrounded DC control conductors. • Yellow represents ungrounded control circuit conductors that may remain energized when the main disconnecting means is in the OFF position. These conductors must be yellow throughout the entire circuit, including wiring in the control panel and the external field wiring. • White or natural gray represents a grounded circuit conductor. • White with blue stripe represents a grounded DC current-carrying circuit conductor. International and European standards require you to use light blue for the neutral conductor. • White with yellow stripe represents grounded AC current-carrying control circuit conductors that remain energized when the disconnecting means is in the OFF position. For additional circuits powered from different sources that remain energized when the main disconnecting means is in the OFF position, you must use striping colors other than green, yellow or blue to uniquely identify the grounded conductors.
By Augustine Yvonne. Engine Wiring. Published at Tuesday, January 16th 2018, 22:15:55 PM. A great feature of many DMM’s is the continuity setting. The continuity function measures resistance, and if there is a complete connection the meter will give an audible beep. If there is no continuity your DMM will show “OL” on the display meaning there is an open line. You can use this to test for electrical shorts in wiring or components. I commonly use this function to quickly test for shorted ignition switches and ignition coils.
By Augustine Yvonne. Engine Wiring. Published at Tuesday, January 16th 2018, 22:09:05 PM. In our example below the bad spark plug ignition cable has a resistance reading of 5 mega ohms. That's 5,000,000 ohms! We know that a typical small engine ignition coil uses between 3 to 5 amps. By using the above mathematical formula we can determine that the bad spark plug ignition cable caused between 15,000,000 to 20,000,000 volts to be generated by the ignition coil!
By Annette Noele. Engine Wiring. Published at Tuesday, January 16th 2018, 21:07:27 PM. As the piston in your engine moves downward it creates a vacuum which draws in air through the intake end of the carburetor. As the air travels through the venturi, the air’s pressure drops, and fuel is drawn down from the fuel bowl, and then back up through the main jet and emulsion tube. The low pressure air mixes with and atomizes the fuel. This air/fuel mixture continues through the intake valve and into your combustion chamber.
By Annette Noele. Engine Wiring. Published at Tuesday, January 16th 2018, 20:20:08 PM. To solve the leak into the atmospheric vent make sure your float level is adjusted perfectly. The float should be perfectly parallel to the upper carburetor body or sit slightly lower than level. This keeps fuel below where the two halves of the atmospheric vent meet. Also make sure your carburetor halves are not warped when the bolts are tightened down. If there is a visible gap between the two halves of the carburetor at the atmospheric vent; sand down the two halves until the gap is gone.
By Blandine Honorine. Engine Wiring. Published at Tuesday, January 16th 2018, 20:05:08 PM. Measuring resistance can indicate the health of a component. For example we can determine if an ignition coil is healthy or not by measuring the resistance of its windings. To measure resistance, set your meter to Ω ohms resistance. If you need to select a range, select the smallest range normally 200 ohms. Place the red probe onto one of the small terminals of the ignition coil, and the black one on the remaining small terminal. Your resistance will then display. A normal ignition coil should read about 3.5 to 4 ohms. If your meter reads a much higher resistance it means your ignition coil may have a short and is faulty.
By Annette Noele. Electrical Wiring. Published at Tuesday, January 16th 2018, 19:03:51 PM. When constructing junction boxes and pull boxes, you must be careful to exclude materials such as dust, flyings, oil and coolant. After you complete all wiring operations, you must seal all unused knockouts or openings.
D-42 - Engine Wiring Diagram Specialist
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