By Babette Benjamine. Electrical Wiring. Publised at Tuesday, November 28th 2017, 18:51:48 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 Claudie Ulysse. Electrical Wiring. Publised at Wednesday, January 24th 2018, 10:54:28 AM. Every type of machine has unique requirements when it comes to operator safety. From an electrical standpoint, industrial machine equipment and tools - from drill presses to multi-motored automatic machines - can present special fire and shock hazards.
By Claudie Ulysse. Electrical Wiring. Published at Monday, January 29th 2018, 18:33:04 PM. You are required to use pressure connectors to connect conductors to devices with lug-type terminals that are not equipped with saddle straps or equivalent means of retaining conductor strands.
By Annette Noele. Electrical Wiring. Published at Monday, January 29th 2018, 18:06:45 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.
By Blandine Honorine. Electrical Wiring. Published at Monday, January 29th 2018, 07:46:23 AM. Electrical equipment uses a wide variety of wire and cable types and it is up to us to be able to correctly identify and use the wires which have been specified. The wrong wire types will cause operational problems and could render the unit unsafe.
By Blandine Honorine. Electrical Wiring. Published at Monday, January 29th 2018, 04:31:51 AM. 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 Severin Theodore. Electrical Wiring. Published at Monday, January 29th 2018, 03:26:36 AM. When electricity was originally used for practical purposes, it was used for communication in the form of the electric telegraph and the telephone. Petroleum and paraffin lamps were still lighting homes until the late 1800s, when Thomas Edison developed the light bulb.
By Blandine Honorine. Electrical Wiring. Published at Sunday, January 28th 2018, 23:39:19 PM. Soldered connections should be made only to terminals suitable for that purpose. Transformers may be fitted with turret tags suitable for soldering and printed circuit board assemblies may have solder pins.
By Severin Theodore. Electrical Wiring. Published at Sunday, January 28th 2018, 21:58:26 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.
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