{"id":5648,"date":"2023-04-13T15:20:39","date_gmt":"2023-04-13T07:20:39","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=5648"},"modified":"2023-09-01T13:55:10","modified_gmt":"2023-09-01T05:55:10","slug":"ele5728","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele5728\/","title":{"rendered":"The difference between shielded and unshielded cables. What is the shielded cable used for?"},"content":{"rendered":"

There are two situations where shielded cable should be used. The first situation is when the cable will be run near potential sources of EMI. An industrial facility is a good example where there may be large motors and other heavy current-drawing machines.<\/p>\n

The second situation is when any degradation or corruption of the transmitted signal can have devastating or expensive consequences. An example is equipment with motion, where a spurious signal could cause unexpected motion with potentially harmful consequences. Another example is when corruption of the transmitted data can cause inconvenience or lead to inaccurate records, perhaps wrong decisions.<\/p>\n

Cables used in safety-critical applications should always be shielded to prevent accidents.<\/p>\n

Types of cable shielding<\/p>\n

There are two main methods of adding shielding to cables. The cable is either wrapped in a thin, polyester-backed aluminum foil or surrounded by a copper braid. A variation of braiding is to wrap a helix of wire around the conductor, a so-called "spiral" shield. Choosing the most appropriate technology requires understanding how their strengths and weaknesses meet the needs of the application.<\/p>\n

In some environments, the consequences of EMI can be highly destructive and using both types of shielding in the cable may be desirable.<\/p>\n

\"\"

What is the purpose of shielded cable?<\/p>\n

Shielded cable is preferred in many industrial environments. In these cases, EMI sources are either known to exist or may be installed later. In contrast, commercial locations, offices, and home environments rarely have any significant EMI sources. In these cases, the additional expense of shielded cable may be unnecessary and twisted pair may be sufficient.<\/p>\n

Industry Applications<\/p>\n

Shielded cable is used in many industries and applications, with the common theme being the need to prevent interference with the signals being sent along the line. Some examples include:<\/p>\n

Communications \u2013 Access control, alarms, CCTV, video and instrumentation<\/p>\n

Defense \u2013 Shielded cables are used in a large amount of military equipment due to the high levels of reliability required and the impossibility of predicting EMI exposure.<\/p>\n

Aerospace \u2013 There are many potential sources of EMI and RFI on aircraft, so high-quality shielding is necessary<\/p>\n

Medical \u2013 Equipment used for monitoring, imaging, and diagnostics may be placed in close proximity to sources of EMI and RFI, so shielding is essential.<\/p>","protected":false},"excerpt":{"rendered":"

There are two situations where shielded cable should be used. The first situation is when the cable will be run near potential sources of EMI. An industrial facility is a good example where there may be [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[253,236],"class_list":["post-5648","post","type-post","status-publish","format-standard","hentry","category-blog","tag-blog","tag-pingbixian"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5648","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/comments?post=5648"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5648\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=5648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=5648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=5648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}