{"id":108,"date":"2020-01-13T13:41:18","date_gmt":"2020-01-13T18:41:18","guid":{"rendered":"https:\/\/opentextbc.ca\/basicmotorcontrol\/chapter\/schematic-to-wiring\/"},"modified":"2023-03-02T11:56:34","modified_gmt":"2023-03-02T16:56:34","slug":"schematic-to-wiring","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/basicmotorcontrol\/chapter\/schematic-to-wiring\/","title":{"raw":"Transferring From Schematic to Wiring Diagram for Connection Purposes","rendered":"Transferring From Schematic to Wiring Diagram for Connection Purposes"},"content":{"raw":"A completed [pb_glossary id=\"246\"]wiring diagram[\/pb_glossary] can help with the physical installation of wires. To aid in the development of a wiring diagram, it is useful to start with the circuit\u2019s [pb_glossary id=\"245\"]schematic diagram[\/pb_glossary] and the [pb_glossary id=\"248\"]numbering system[\/pb_glossary].\r\n\r\n[caption id=\"attachment_107\" align=\"aligncenter\" width=\"1024\"]\"\" A wiring and schematic drawing[\/caption]\r\n\r\nConsider the figure above. It includes a three-wire schematic diagram as well as the equivalent control components and the [pb_glossary id=\"243\"]power circuit[\/pb_glossary]. In this example, there is no control transformer, so we will be taking control power directly from the line. The [pb_glossary id=\"242\"]control circuit[\/pb_glossary] power is taken from the load side of the [pb_glossary id=\"209\"]overcurrent[\/pb_glossary] devices and the line side of the power contacts.\r\n\r\nOnce the schematic diagram has been properly numbered, each device will have two numbers identifying it, one wire on the line side, and one on the load side. For example, in a three-wire circuit, the stop button gets wires 1 and 2, while the start button and the holding contact each get wire numbers 2 and 3 (hence the term \"[pb_glossary id=\"249\"]2-3 contact[\/pb_glossary]\").\r\n\r\n[caption id=\"attachment_107\" align=\"aligncenter\" width=\"1024\"]\"\" Schematic and wiring diagrams with numbers[\/caption]\r\n\r\nOnce all the devices have been properly numbered, we simply play connect the dots. Each point that shares the same number is [pb_glossary id=\"247\"]electrically common[\/pb_glossary] and needs to be connected together. Use straight lines and only connect wires at terminal points on equipment.\r\n\r\n[caption id=\"attachment_107\" align=\"aligncenter\" width=\"1024\"]\"\" Schematic and wiring diagrams - complete.[\/caption]\r\n\r\nMake sure that all connections happen at termination points or \u201cterminal to terminal.\u201d In practice, we usually only connect a maximum of two wires to any one point and never make a \u201cfree-air splice.\u201d\r\n\r\nThe figure above illustrates each of the strengths that wiring and schematic diagrams have: Schematic diagrams are easy to read and used to logically troubleshoot a circuit, while wiring diagrams show how equipment is physically connected together.\r\n\r\nhttps:\/\/media.bccampus.ca\/id\/0_flrfs4ye?width=608&height=402&playerId=23449753","rendered":"

A completed wiring diagram<\/a> can help with the physical installation of wires. To aid in the development of a wiring diagram, it is useful to start with the circuit\u2019s schematic diagram<\/a> and the numbering system<\/a>.<\/p>\n

\"\"
A wiring and schematic drawing<\/figcaption><\/figure>\n

Consider the figure above. It includes a three-wire schematic diagram as well as the equivalent control components and the power circuit<\/a>. In this example, there is no control transformer, so we will be taking control power directly from the line. The control circuit<\/a> power is taken from the load side of the overcurrent<\/a> devices and the line side of the power contacts.<\/p>\n

Once the schematic diagram has been properly numbered, each device will have two numbers identifying it, one wire on the line side, and one on the load side. For example, in a three-wire circuit, the stop button gets wires 1 and 2, while the start button and the holding contact each get wire numbers 2 and 3 (hence the term “2-3 contact<\/a>“).<\/p>\n

\"\"
Schematic and wiring diagrams with numbers<\/figcaption><\/figure>\n

Once all the devices have been properly numbered, we simply play connect the dots. Each point that shares the same number is electrically common<\/a> and needs to be connected together. Use straight lines and only connect wires at terminal points on equipment.<\/p>\n

\"\"
Schematic and wiring diagrams – complete.<\/figcaption><\/figure>\n

Make sure that all connections happen at termination points or \u201cterminal to terminal.\u201d In practice, we usually only connect a maximum of two wires to any one point and never make a \u201cfree-air splice.\u201d<\/p>\n

The figure above illustrates each of the strengths that wiring and schematic diagrams have: Schematic diagrams are easy to read and used to logically troubleshoot a circuit, while wiring diagrams show how equipment is physically connected together.<\/p>\n