{"id":103,"date":"2020-01-13T13:40:34","date_gmt":"2020-01-13T18:40:34","guid":{"rendered":"https:\/\/opentextbc.ca\/basicmotorcontrol\/chapter\/conduit-fill\/"},"modified":"2022-02-08T14:25:28","modified_gmt":"2022-02-08T19:25:28","slug":"conduit-fill","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/basicmotorcontrol\/chapter\/conduit-fill\/","title":{"raw":"Conduit Fill","rendered":"Conduit Fill"},"content":{"raw":"The [pb_glossary id=\"248\"]numbering system[\/pb_glossary] can also be used to determine how many wires will need to be pulled through the conduit to connect each device properly.\r\n\r\nConsider the following [pb_glossary id=\"242\"]control circuit[\/pb_glossary] and proposed conduit layout:\r\n\r\n[caption id=\"attachment_100\" align=\"alignnone\" width=\"4224\"]\"\" A schematic diagram of a jog circuit utilizing a control relay and the proposed layout of the installation[\/caption]\r\n\r\nIf this is the proposed physical layout of the equipment, how many wires must be pulled through each piece of conduit?\r\n\r\nConduits \u201cA\u201d and \u201cE\u201d will have only the 3-phase power conductors in them. Conduit \u201cD\u201d will have the three power conductors as well as several control conductors. It is permissible for control conductors to share a conduit with power conductors provided their insulations share the same [pb_glossary id=\"219\"]voltage[\/pb_glossary]\u00a0and temperature ratings.\r\n\r\nTo determine how many control circuit conductors will need to be pulled through each conduit, we apply the numbering system.\r\n\r\nFirst, number the wires in the [pb_glossary id=\"245\"]schematic[\/pb_glossary]. Each point that is [pb_glossary id=\"247\"]electrically common[\/pb_glossary] gets the same number. Jump up to the next number each time you go through a device or load.\r\n\r\n[caption id=\"attachment_101\" align=\"aligncenter\" width=\"4256\"]\"\" A numbered schematic diagram[\/caption]\r\n\r\nOnce the schematic diagram is complete, transfer the numbers of each device to their corresponding location in the [pb_glossary id=\"246\"]wiring diagram[\/pb_glossary]. Each point that has the same number needs a wire connecting them.\r\n\r\n[caption id=\"attachment_395\" align=\"alignnone\" width=\"1258\"]\"\" Conduit fill determined in the wiring diagram with numbers transferred from the schematic diagram[\/caption]\r\n\r\nKnowing the total number of wires to pull through a complicated run of the conduit is critical because adding wires afterwards can be impractical and difficult.","rendered":"

The numbering system<\/a> can also be used to determine how many wires will need to be pulled through the conduit to connect each device properly.<\/p>\n

Consider the following control circuit<\/a> and proposed conduit layout:<\/p>\n

\"\"
A schematic diagram of a jog circuit utilizing a control relay and the proposed layout of the installation<\/figcaption><\/figure>\n

If this is the proposed physical layout of the equipment, how many wires must be pulled through each piece of conduit?<\/p>\n

Conduits \u201cA\u201d and \u201cE\u201d will have only the 3-phase power conductors in them. Conduit \u201cD\u201d will have the three power conductors as well as several control conductors. It is permissible for control conductors to share a conduit with power conductors provided their insulations share the same voltage<\/a>\u00a0and temperature ratings.<\/p>\n

To determine how many control circuit conductors will need to be pulled through each conduit, we apply the numbering system.<\/p>\n

First, number the wires in the schematic<\/a>. Each point that is electrically common<\/a> gets the same number. Jump up to the next number each time you go through a device or load.<\/p>\n

\"\"
A numbered schematic diagram<\/figcaption><\/figure>\n

Once the schematic diagram is complete, transfer the numbers of each device to their corresponding location in the wiring diagram<\/a>. Each point that has the same number needs a wire connecting them.<\/p>\n

\"\"
Conduit fill determined in the wiring diagram with numbers transferred from the schematic diagram<\/figcaption><\/figure>\n

Knowing the total number of wires to pull through a complicated run of the conduit is critical because adding wires afterwards can be impractical and difficult.<\/p>\n

definition<\/span>