By Babette Benjamine. Electrical Wiring. Publised at Friday, January 19th 2018, 07:00:58 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 Claudie Ulysse. Electrical Wiring. Publised at Thursday, January 18th 2018, 16:50:41 PM. 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 Annette Noele. Electrical Wiring. Published at Friday, February 02nd 2018, 03:36:21 AM. After successful completion, the troubleshooter can improve their understanding of DC, AC, three phase circuits, Relays, Contactors, PLC, Electronics, and other related technology.
By Claudie Ulysse. Electrical Wiring. Published at Friday, February 02nd 2018, 00:09:01 AM. For grounded control circuits, you may use a green (with or without one or more yellow stripes) or a bare conductor to connect the transformer terminal to a grounding terminal on the control panel.
By Linda Cerise. Electrical Wiring. Published at Thursday, February 01st 2018, 20:21:09 PM. The terminations of shielded or screened conductors should be terminated so that the screen cannot fray. If the screen is to be connected then make it off in the same way as for coaxial cable with a soldered pigtail and a sleeve.
By Severin Theodore. Electrical Wiring. Published at Thursday, February 01st 2018, 18:52:27 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 Annette Noele. Electrical Wiring. Published at Thursday, February 01st 2018, 18:03:10 PM. This section requires you to support conductors in panels to keep them in place. You're permitted to use wiring channels if they're made of a flame-retardant insulating material. If you're working with back-connected control panels, you must provide access doors or swing out panels that swing about a vertical axis. Multiple-device control panels must have terminal blocks or attachment plugs and receptacles to terminate and connect all outgoing control conductors.
By Charline Rodrigue. Electrical Wiring. Published at Thursday, February 01st 2018, 13:51:49 PM. Both line and wiring diagrams are a language of pictures. It is not difficult to learn the basic symbols. Once you do, you are able to read diagrams quickly, and can often understand a circuit at a glance. The more you work with both line and wiring diagrams, the better you will become in analyzing them.
By Sylviane Marcelline. Electrical Wiring. Published at Thursday, February 01st 2018, 12:12:21 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.
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