By Blandine Honorine. Electrical Wiring. Publised at Sunday, February 04th 2018, 10:00:28 AM. The combined cross-sectional area of all conductors and cables is not permitted to exceed 50% of the interior cross-sectional area of the raceway. The fill provisions are based on the actual dimensions of the conductors or cables used.
By Annette Noele. Electrical Wiring. Publised at Sunday, January 28th 2018, 19:28:59 PM. When including a PLC in the ladder diagram still remains. But, it does tend to become more complex. Figure 5 below shows a schematic diagram for a PLC based motor control system, similar to the previous motor control example.
By Claudie Ulysse. Electrical Wiring. Publised at Saturday, January 27th 2018, 10:46:17 AM. A lamp inside an enclosure provided for use during maintenance is an example of such a circuit. The control panel may be isolated but the lamp will require power so that the engineer can see while working on it.
By Augustine Yvonne. Electrical Wiring. Published at Sunday, August 20th 2017, 01:27:26 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 Augustine Yvonne. Electrical Wiring. Published at Friday, August 18th 2017, 23:53:53 PM. The diagram also shows numbering for the wires in the device. This is essential for industrial control systems that may contain hundreds or thousands of wires. These numbering schemes are often particular to each facility, but there are tools to help make wire labels that will appear in the final controls cabinet.
By Annette Noele. Electrical Wiring. Published at Tuesday, August 15th 2017, 22:09:14 PM. Ensure that identification tags and cable markers are legible, marked with a permanent ink and suitable for the environment where the panel is to be used. They should also correspond with those shown in the machine drawings and instruction or service documentation.
By Charline Rodrigue. Electrical Wiring. Published at Sunday, August 13th 2017, 20:57:13 PM. Dashed lines are drawn between the symbols to denote which switches control specific lights or receptacles. There are quite a few symbols used to represent the devices used in home electrical wiring but some of them are very similar, so care should be used when working with them!
By Charline Rodrigue. Engine Wiring. Published at Wednesday, August 02nd 2017, 18:14:16 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 Babette Benjamine. Electrical Wiring. Published at Saturday, July 29th 2017, 15:58:18 PM. When the current is switched on or off, the electro-magnetic field increases and decreases, rapidly causing, in effect, a radio signal. The effect is similar to the crackle that can sometimes be heard on the radio or television when something like a fridge switches on and off. This radiated signal can be picked up by the other wires in the system and cause interference to the normal working voltages in the system
By Babette Benjamine. Electrical Wiring. Published at Friday, July 21st 2017, 12:46:45 PM. You must totally enclose conductors and their connection external to the control panel enclosure in suitable raceways or enclosures. Unless used for flexible connections involving small or infrequent movements, or connections to normally stationary motors, limit switches and other externally mounted devices, fittings used with raceways or multiconductor cables must be liquidtight.
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