By Sylviane Marcelline. Electrical Wiring. Publised at Thursday, February 15th 2018, 14:13:11 PM. • 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 Babette Benjamine. Electrical Wiring. Publised at Friday, January 19th 2018, 04:49:43 AM. 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.
By Claudie Ulysse. Electrical Wiring. Publised at Saturday, November 18th 2017, 18:25:14 PM. 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 Tuesday, January 23rd 2018, 20:07:12 PM. Electricity is supplied to your home through your electric utility’s overhead or buried power lines. Before entering your home, electricity passes through a watt-hour meter which measures the amount of electricity used.
By Linda Cerise. Electrical Wiring. Published at Tuesday, January 23rd 2018, 19:10:16 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, January 23rd 2018, 16:54:52 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 Claudie Ulysse. Electrical Wiring. Published at Tuesday, January 23rd 2018, 16:06:25 PM. Electrical Standard for Industrial Machinery, helps you ensure fire safety by addressing the electrical considerations specific to equipment, apparatus, and systems used in industrial manufacturing processes.
By Claudie Ulysse. Electrical Wiring. Published at Tuesday, January 23rd 2018, 14:12:24 PM. 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 Babette Benjamine. Electrical Wiring. Published at Tuesday, January 23rd 2018, 13:47:53 PM. It is uncommon for engineers to build their own PLC panel designs (but not impossible of course). For example, once the electrical designs are complete, they must be built by an electrician. Therefore, it is your responsibility to effectively communicate your design intentions to the electricians through drawings.
By Claudie Ulysse. Electrical Wiring. Published at Tuesday, January 23rd 2018, 12:04:25 PM. A conductor is a material which will allow an electric current to flow easily. In the case of a wire connection, it needs to be a very good conductor. Good conductors include most metals. The most common conductor used in wire is copper, although you may come across others such as aluminium. An insulator on the other hand is a material which does not allow an electric current to flow. Rubber and most plastics are insulators.
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