By Augustine Yvonne. Electrical Wiring. Publised at Wednesday, January 24th 2018, 11:53:01 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 Linda Cerise. Electrical Wiring. Publised at Saturday, January 27th 2018, 05:30:58 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 Augustine Yvonne. Electrical Wiring. Published at Sunday, September 03rd 2017, 06:01:46 AM. Modern electrical machine tool equipment may vary from that of a single-motor machine (such as a drill press that performs simple, repetitive operations) to very large, multimotored automatic machines, which contain highly complex electrical control systems. Typically, these machines are especially designed, factory-wired, tested by the builder and then erected in the plant.
By Linda Cerise. Electrical Wiring. Published at Friday, September 01st 2017, 04:53:51 AM. Where the circuits work at different voltages, the conductors must be separated by suitable barriers or all the wires insulated for the highest voltage to which any conductor may be subjected.
By Augustine Yvonne. Electrical Wiring. Published at Wednesday, August 30th 2017, 02:31:22 AM. A receptacle outlet is one in which one or more receptacles are installed for the purpose of attaching “plug and cord-connected” type devices, and a lighting outlet is one intended for a direct-wired connection to a lamp holder, luminaire (lighting fixture) or ceiling fan.
By Charline Rodrigue. Electrical Wiring. Published at Monday, August 28th 2017, 02:21:14 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 Annette Noele. Electrical Wiring. Published at Tuesday, August 22nd 2017, 02:08:06 AM. Wires and cables (conductors) are insulated and protected by a variety of materials (insulators) each one having its own particular properties. The type of material used will be determined by the designer who will take into account the environment in which a control panel or installation is expected to operate as well as the application of individual wires within the panel.
By Augustine Yvonne. Electrical Wiring. Published at Sunday, August 20th 2017, 01:27:26 AM. In general, contactors should be kept away from electronic devices. A highly disturbing device (variable speed drive, frequency converter, etc.) will have less radiation in the panel if it is “encapsulated” in a small, electromagnetically sealed, unpainted metal enclosure.
By Augustine Yvonne. Electrical Wiring. Published at Friday, August 18th 2017, 23:53:53 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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