[{"id":"2975675","item_id":"2975675","match":1,"item_name":"Busbar","c_name":"Busbar","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/39\/25\/88\/39258810c13d742542a88567428b6624.jpg","item_width":170,"item_height":213,"item_type":"topic","missing":0,"item_info":{"summary":"1500 ampere copper busbars within a power distribution rack for a large building    Busbar with plastic wrapping inside of a bus duct   In electric power distribution, a busbar (also bus bar) is a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution. They are also used to connect high voltage equipment at electrical switchyards, and low voltage equipment in battery banks. They are generally uninsulated, and have sufficient stiffness to be supported in air by insulated pillars. These features allow sufficient cooling of the conductors, and the ability to tap in at various points without creating a new joint.  (The term busbar is derived from the Latin word omnibus, which translates into English as \"for all\", indicating that a busbar carries all of the currents in a particular system.)  Design and placement  The material composition and cross-sectional size of the busbar determine the maximum amount of current that can be safely"},"level":"item","offset":0,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"http:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"2975675","c_fldr_id":"79866","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electric power systems components","sort_folders":"1","c_num_items":"74","fi_updated_at":"12\/23\/2014 3:38 AM","fi_tstamp":"1419305934","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"22"},{"id":"3651956","item_id":"3651956","match":1,"item_name":"Distribution board","c_name":"Distribution board","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/7b\/a2\/99\/7ba299e10d597cbabced08e0a1dd78f5.jpg","item_width":220,"item_height":375,"item_type":"topic","missing":0,"item_info":{"summary":"A distribution board (also known as panelboard, breaker panel, or electric panel) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits, while providing a protective fuse or circuit breaker for each circuit in a common enclosure. Normally, a main switch, and in recent boards, one or more residual-current devices (RCD) or residual current breakers with overcurrent protection (RCBO), are also incorporated.  In the United Kingdom, a distribution board designed for domestic installations is known as a consumer unit.[1]  North America    An American circuit breaker panel featuring interchangeable circuit breakers  North American distribution boards are typically housed in sheet metal enclosures, with the circuit breakers positioned in two columns operable from the front. Some panelboards are provided with a door covering the breaker switch handles, but all are constructed with a dead front; that is to say the front of the enclosure (whether it has a door or n"},"level":"item","offset":1,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"http:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"3651956","c_fldr_id":"270580","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electric power distribution","sort_folders":"1","c_num_items":"131","fi_updated_at":"02\/11\/2015 3:45 PM","fi_tstamp":"1423669550","c_fldr_count":1},{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"3651956","c_fldr_id":"221577","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electrical wiring","sort_folders":"1","c_num_items":"86","fi_updated_at":"02\/08\/2015 7:38 PM","fi_tstamp":"1423424336","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"24"},{"id":"27193473","item_id":"27193473","match":1,"item_name":"Electrical busbar system","c_name":"Electrical busbar system","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/42\/2e\/e6\/422ee6c393b8f27af3451346aa291c5c.jpg","item_width":500,"item_height":232,"item_type":"topic","missing":0,"item_info":{"summary":"Enclosure comparision with normal wiring & with busbar system    HRC Fuse switch disconnector and cylinderical fuse holders mounted on to a busbar  Electrical Busbar System some times simply referred to as Busbar system is a modular approach to Electrical wiring, where in instead of standard cable wiring to every single electrical device, the electrical devices are mounted on to a adapter which is directly fitted to current carrying busbar. This modular approach is being used in distribution boards, Automation Panels & other power kinds of installation in an electrical enclosure.[1]  Busbar system is subject to safety standards for design and installation along with electrical enclosure according to IEC 61439-1 and vary by locality, country or region. & the system depends on Allowable Busbar types and sizes are vary according to operating voltage and current carrying capacity,[2]  Content & types of Busbar System    Incoming cable attached to busbar via clamps without drilling the busbar"},"level":"item","offset":2,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"27193473","c_fldr_id":"221577","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electrical wiring","sort_folders":"1","c_num_items":"86","fi_updated_at":"12\/01\/2018 8:55 PM","fi_tstamp":"1543697736","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"26"},{"id":"26631105","item_id":"26631105","match":1,"item_name":"Bus duct","c_name":"Bus duct","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/50\/28\/f7\/5028f733fe0db27fe5f53f56b777010b.png","item_width":220,"item_height":121,"item_type":"topic","missing":0,"item_info":{"summary":"5000 ampere copper and 4000A aluminium bus ducts    Bus duct inside an electrical service building at a Canadian oil refinery.    Bus duct inside an electrical closet in Mississauga Civic Centre, firestopped along with electrical conduit using firestop mortar.    1992 Bus duct segment with internal factory firestop that was replaced prior to fire testing with firestop mortar. To supply such systems, the bus duct manufacturer had to know where the duct penetrated fire separations required to have a fire-resistance rating.  In electrical power distribution, a bus duct (also called busway), is a sheet metal duct containing either copper or aluminium busbars for the purpose of conducting a substantial current of electricity. It is an alternative means of conducting electricity to power cables or cable bus.  Originally a busway consisted of bare copper conductors supported on inorganic insulators, such as porcelain, mounted within a non-ventilated steel housing.[1]  History  Busways were produced due to request of"},"level":"item","offset":3,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"http:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"26631105","c_fldr_id":"221577","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electrical wiring","sort_folders":"1","c_num_items":"86","fi_updated_at":"04\/01\/2018 6:15 PM","fi_tstamp":"1522606510","c_fldr_count":1},{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"26631105","c_fldr_id":"79866","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electric power systems components","sort_folders":"1","c_num_items":"74","fi_updated_at":"03\/28\/2018 3:08 AM","fi_tstamp":"1522206503","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"27"},{"id":"1524724","item_id":"1524724","match":1,"item_name":"Carey Foster bridge","c_name":"Carey Foster bridge","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/e1\/f1\/22\/e1f1228ff384986e1b4c885295f8e308.png","item_width":350,"item_height":158,"item_type":"topic","missing":0,"item_info":{"summary":"In electronics, the Carey Foster bridge is a bridge circuit used to measure medium resistances, or to measure small differences between two large resistances. It was invented by Carey Foster as a variant on the Wheatstone bridge. He first described it in his 1872 paper \"On a Modified Form of Wheatstone's Bridge, and Methods of Measuring Small Resistances\" (Telegraph Engineer's Journal, 1872\u20131873, 1, 196).  Use    The Carey Foster bridge. The thick-edged areas are busbars of almost zero resistance.  In the adjacent diagram, X and Y are resistances to be compared. P and Q are nearly equal resistances, forming the other half of the bridge. The bridge wire EF has a jockey contact D placed along it and is slid until the galvanometer G measures zero. The thick-bordered areas are thick copper busbars of almost zero resistance.   Place a known resistance in position Y.  Place the unknown resistance in position X.  Adjust the contact D along the bridge wire EF so as to null the galvanometer. This position (as a percen"},"level":"item","offset":4,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"http:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"1524724","c_fldr_id":"588274","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Bridge circuits","sort_folders":"1","c_num_items":"13","fi_updated_at":"03\/25\/2015 4:19 AM","fi_tstamp":"1427257184","c_fldr_count":1},{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"1524724","c_fldr_id":"116454","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Analog circuits","sort_folders":"1","c_num_items":"115","fi_updated_at":"12\/30\/2014 1:29 PM","fi_tstamp":"1419946179","c_fldr_count":1},{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"1524724","c_fldr_id":"102739","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Impedance measurements","sort_folders":"1","c_num_items":"25","fi_updated_at":"12\/25\/2014 7:55 PM","fi_tstamp":"1419537335","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"30"},{"id":"1569427","item_id":"1569427","match":1,"item_name":"Electrical room","c_name":"Electrical room","soc_link":0,"cache":0,"item_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/images\/cache\/da\/04\/28\/da0428be65e5147e63c92f99f7d831e4.JPG","item_width":240,"item_height":180,"item_type":"topic","missing":0,"item_info":{"summary":"Main electrical distribution room in a large building.    The back of an antique electrical room, still operational at a US plant as of 2014. All conducting busbars are open and operators must be careful not to touch them.  An electrical room is a room or space in a building dedicated to electrical equipment. Its size is usually proportional to the size of the building; large buildings may have a main electrical room and subsidiary electrical rooms. Electrical equipment may be for power distribution equipment, or for communications equipment.[1]  Electrical rooms typically house the following equipment:   Electric switchboards  Distribution boards   Circuit breakers and disconnects  Electricity meter  Transformers  Busbars   Backup batteries in a Battery room   Fire alarm control panels  Distribution frames   In large building complexes, the primary electrical room may house an indoor electrical substation.  Construction features  The construction features of an electrical room vary depending on the scope of"},"level":"item","offset":5,"owner_id":"1575","owner_username":"Wikipedia","owner_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/1\/1575\/thumbs\/me.jpg","has_image":1,"item_feedback":[{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"1569427","c_fldr_id":"270580","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Electric power distribution","sort_folders":"1","c_num_items":"131","fi_updated_at":"02\/11\/2015 3:45 PM","fi_tstamp":"1423669554","c_fldr_count":1},{"fi_state":"1","spam":0,"hidden":0,"private":0,"item_id":"1569427","c_fldr_id":"29646","c_username":"revolvybrain","c_user_id":"389","c_user_image":"https:\/\/d1k5w7mbrh6vq5.cloudfront.net\/data\/users\/0\/0\/0\/0\/389\/thumbs\/user.jpg","c_user_width":"300","c_user_height":"300","c_firstname":"Revolvy","c_lastname":"Brain","c_fldr_name":"Rooms","sort_folders":"1","c_num_items":"222","fi_updated_at":"10\/07\/2014 2:01 PM","fi_tstamp":"1412690510","c_fldr_count":1}],"properties":9,"following":0,"saved_folders":[],"name_count":1,"elastic":1,"took":6,"vote":0,"elapsed":"32"}]