{"id":2543,"date":"2017-09-01T23:44:35","date_gmt":"2017-09-01T23:44:35","guid":{"rendered":"http:\/\/avitech.com.au\/?page_id=2543"},"modified":"2017-09-02T00:18:33","modified_gmt":"2017-09-02T00:18:33","slug":"dec-nema-power-connectors","status":"publish","type":"page","link":"https:\/\/avitech.com.au\/?page_id=2543","title":{"rendered":"DEC NEMA Power Connectors"},"content":{"rendered":"<p>This page has some information about the power connectors used in DEC PDP-8 and PDP-11 equipment.<\/p>\n<h4>110V AC<\/h4>\n<p>For 110V AC, DEC uses the standard 3-prong U.S. power connector. This is known as the &#8220;NEMA 5-15&#8221; standard.<\/p>\n<p>The plug is a NEMA 5-15P and the receptacle is a NEMA 5-15R.<\/p>\n<p>Looking into the receptacle with the round Ground pin at the bottom:<\/p>\n<ul>\n<li>The wire for the Ground pin is Green<\/li>\n<li>The rectangular pin on the left is Neutral (sometimes the slot length for this pin is slightly larger than the Hot pin). The wire colour for Neutral is White<\/li>\n<li>The rectangular pin on the right is Hot (Active). The wire colour for Hot is Black<\/li>\n<\/ul>\n<h4>240V AC<\/h4>\n<p>For equipment distributed in Australia (where our single-phase mains power is 230VAC), DEC used the &#8220;NEMA 6-15&#8221; connectors.<\/p>\n<p>This is a 3-prong plug (similar in dimensions to the NEMA 5-15 series) except that the two flat pins are horizontal instead of vertical.<\/p>\n<p>The NEMA 6-15 was not designed for use on single-phase power systems. For this reason it does not have &#8220;Hot&#8221; and &#8220;Neutral&#8221; pins. Instead it has two Hot pins and NO Neutral. In the U.S. it is typically 208V AC (when connected to 2 phases of a 3-phase supply), or 120V AC (when connected to a &#8220;split-phase&#8221; supply).<\/p>\n<p>Looking into the NEMA 6-15 receptacle with the round Ground pin at the bottom:<\/p>\n<ul>\n<li>The wire for the Ground pin is Green<\/li>\n<li>The rectangular pin on the left is used by DEC for Neutral. The wire colour is Blue<\/li>\n<li>The rectangular pin on the right is used by DEC for Hot (Active). The wire colour is Brown<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This page has some information about the power connectors used in DEC PDP-8 and PDP-11 equipment. 110V AC For 110V AC, DEC uses the standard 3-prong U.S. power connector. This is known as the &#8220;NEMA 5-15&#8221; standard. The plug is a NEMA 5-15P and the receptacle is a NEMA 5-15R. Looking into the receptacle with ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/avitech.com.au\/?page_id=2543\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2543","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P7xTsk-F1","jetpack-related-posts":[{"id":2206,"url":"https:\/\/avitech.com.au\/?page_id=2206","url_meta":{"origin":2543,"position":0},"title":".Info about Cabling and Connectors","author":"malcolm","date":"3-July-2017","format":false,"excerpt":"This page has my notes about Molex Connectors and Hookup Wire Molex 0.062\" (1.57mm) Housings and Pins This is the series we used to use for the 24-pin connectors when looming arcade machines. The maximum current rating per pin is 4A. A full list of 0.062\" pins and housings is\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=1050%2C600 3x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/12\/molex-pins-and-housings.jpg?resize=1400%2C800 4x"},"classes":[]},{"id":1439,"url":"https:\/\/avitech.com.au\/?page_id=1439","url_meta":{"origin":2543,"position":1},"title":"DEC 871B Power Controller","author":"malcolm","date":"26-December-2016","format":false,"excerpt":"The 871B Power Controller is a single-phase 240VAC power controller found in some PDP-11 systems. It has 6 switched power sockets. It has a small ON-OFF-ON double-throw centre-off toggle switch. With this switch in the OFF position, there will be no mains power at the power socket. Power can be\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=1050%2C600 3x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2016\/12\/20161226_083510-Large.jpg?resize=1400%2C800 4x"},"classes":[]},{"id":766,"url":"https:\/\/avitech.com.au\/?page_id=766","url_meta":{"origin":2543,"position":2},"title":"RS232 Connectors","author":"malcolm","date":"19-July-2016","format":false,"excerpt":"This page sets out some basic information about serial connectors used for RS232-level asynchronous serial communications. Protocol and signal levels When TXD and RXD lines are in the IDLE state (and for a Logic 1 on these lines): TTL logic lines are at +5V RS232 lines are at -VE voltages\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2022\/08\/de9-connectors-numbered-pins-300x225.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1657,"url":"https:\/\/avitech.com.au\/?page_id=1657","url_meta":{"origin":2543,"position":3},"title":"QBUS Front Panel Project","author":"malcolm","date":"31-January-2017","format":false,"excerpt":"This project is an Arudino-based front panel for a bare QBUS PDP-11 chassis. It provides the switch and indicator functionality typically found on an early QBUS PDP-11 chassis (such as a BA11-MF or BA11-NC) and does the following: Switches an ATX power supply on and off, to power the PDP-11\u2026","rel":"","context":"With 5 comments","block_context":{"text":"With 5 comments","link":"https:\/\/avitech.com.au\/?page_id=1657#comments"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2017\/01\/20170712_111817-Medium.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2017\/01\/20170712_111817-Medium.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2017\/01\/20170712_111817-Medium.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2017\/01\/20170712_111817-Medium.jpg?resize=700%2C400 2x"},"classes":[]},{"id":4482,"url":"https:\/\/avitech.com.au\/?page_id=4482","url_meta":{"origin":2543,"position":4},"title":"DEC Cables and Connectors","author":"malcolm","date":"4-June-2021","format":false,"excerpt":"This page lists the common DEC Cables and Connectors that I have encountered. BC11U This is a 40-pin Berg to 4 x DB25 cable. It is used to connect peripherals to a DZV11 (M7957) 4-channel asynchronous multiplexer. An engineering drawing and the wiring details are provided in the DZV11 Field\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1628,"url":"https:\/\/avitech.com.au\/?page_id=1628","url_meta":{"origin":2543,"position":5},"title":"DEC BC01V RS232 Cable","author":"malcolm","date":"17-January-2017","format":false,"excerpt":"DEC BC01V Cable For the PDP-8, the KL8-E (M8650) and KL8-JA (M8655) connect to the outside world via a 40-pin \"Berg\" connector, arranged as 2 rows of 40 pins as shown here. These boards supports 20mA current loop or RS232 communications, depending on the cable that is connected to it.\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/avitech.com.au\/wp-content\/uploads\/2017\/01\/berg-on-kl8ja-300x169.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/pages\/2543","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2543"}],"version-history":[{"count":8,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/pages\/2543\/revisions"}],"predecessor-version":[{"id":2545,"href":"https:\/\/avitech.com.au\/index.php?rest_route=\/wp\/v2\/pages\/2543\/revisions\/2545"}],"wp:attachment":[{"href":"https:\/\/avitech.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}