{"id":19170,"date":"2026-10-17T10:45:41","date_gmt":"2026-10-17T02:45:41","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/power-supply-cable-glands-strain-relief\/"},"modified":"2026-10-19T12:07:17","modified_gmt":"2026-10-19T04:07:17","slug":"power-supply-cable-glands-strain-relief","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/","title":{"rendered":"Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals"},"content":{"rendered":"<article>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Cable_Glands_and_Strain_Relief_Keep_Cable_Loads_Away_from_Power_Supply_Terminals\" >Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Start_at_the_cabinet_wall_not_at_the_terminal_screw\" >Start at the cabinet wall, not at the terminal screw<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Give_each_part_of_the_cable_path_a_clear_job\" >Give each part of the cable path a clear job<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Use_the_LRH-150-12_as_a_chassis-mounted_example\" >Use the LRH-150-12 as a chassis-mounted example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Separate_external_pulling_forces_from_the_final_connection\" >Separate external pulling forces from the final connection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Review_the_assembly_before_energizing_it\" >Review the assembly before energizing it<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Frequently_asked_questions\" >Frequently asked questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Does_the_correct_gland_thread_guarantee_a_correct_cable_fit\" >Does the correct gland thread guarantee a correct cable fit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Can_the_terminal_screws_serve_as_strain_relief\" >Can the terminal screws serve as strain relief?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Does_an_IP-rated_gland_make_a_vented_supply_waterproof\" >Does an IP-rated gland make a vented supply waterproof?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/vi\/news\/power-supply-cable-glands-strain-relief\/#Send_the_cable_and_enclosure_details_with_the_power_supply_enquiry\" >Send the cable and enclosure details with the power supply enquiry<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Cable_Glands_and_Strain_Relief_Keep_Cable_Loads_Away_from_Power_Supply_Terminals\"><\/span>Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<figure data-image-role=\"application_a\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-application-a-72.png?quality=85&#038;strip=all\" alt=\"Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals  title=\" width=\"1536\" height=\"1024\" cable glands and strain relief: keep loads away from power supply terminals title=\"\"><figcaption>Illustrative rewinder control compartment: the incoming jacket is retained at the enclosure entry and internal clamp, with relaxed conductor routing to the supply. Equipment-specific electrical acceptance remains necessary.<\/figcaption><\/figure>\n<p class=\"lead\">A power supply terminal should carry current, not the pulling force from an external cable. Select a cable gland for the cable jacket and enclosure entry, then design the internal support so that installation, vibration and servicing do not tug on the terminal connection. A tidy bundle alone does not demonstrate effective strain relief.<\/p>\n<p>For equipment builders, this is a mechanical interface decision as well as an electrical one. The gland, cable jacket, internal clamps and power supply terminals each have a different job. Ordering them as a coordinated assembly avoids discovering at final wiring that the cable fits the hole but is not properly retained.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Start_at_the_cabinet_wall_not_at_the_terminal_screw\"><\/span>Start at the cabinet wall, not at the terminal screw<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A cable gland usually forms the cable entry into the equipment enclosure. Its clamping range must suit the actual cable outside diameter, while its thread and sealing arrangement must suit the enclosure opening. The individual conductor cross-section is not the same dimension as the jacket diameter. Confirm the permitted cable diameter, clamping range and protection requirements in the selected gland&#8217;s documentation.<\/p>\n<p>A gland can provide strain relief when selected and assembled for that duty; it is not merely a decorative sleeve. Check the particular gland&#8217;s instructions rather than assuming that every fitting with the same thread has identical retention, sealing or environmental performance. A reducing insert, different jacket material or cable near the edge of the permitted range may change the selection.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Give_each_part_of_the_cable_path_a_clear_job\"><\/span>Give each part of the cable path a clear job<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<thead>\n<tr>\n<th>Interface<\/th>\n<th>What it must achieve<\/th>\n<th>What to establish before ordering<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Enclosure entry<\/td>\n<td>Retain the intended cable and provide the specified entry protection<\/td>\n<td>Cable diameter, jacket compatibility, thread, wall thickness and sealing method<\/td>\n<\/tr>\n<tr>\n<td>Internal cable support<\/td>\n<td>Prevent cable movement from loading the terminal connection<\/td>\n<td>Clamp position, supporting structure, service movement and cable bend requirements<\/td>\n<\/tr>\n<tr>\n<td>Power supply terminal<\/td>\n<td>Make the intended electrical connection<\/td>\n<td>Accepted conductor preparation, connection rating and manufacturer&#8217;s tightening instructions<\/td>\n<\/tr>\n<tr>\n<td>Service access<\/td>\n<td>Allow inspection or replacement without straining adjacent wiring<\/td>\n<td>Tool access, controlled slack and a repeatable cable route<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Do not add a universal tightening torque or pull-test value to the drawing. Those acceptance values belong to the selected gland, terminal and equipment design. A cable tie used to organize conductors is not automatically a qualified substitute for a strain-relief clamp.<\/p>\n<figure data-image-role=\"product_detail\"><img decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-product-detail-68.png?quality=85&#038;strip=all\" alt=\"Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals  title=\" width=\"1536\" height=\"1024\" cable glands and strain relief: keep loads away from power supply terminals title=\"\"><figcaption>Original product photograph: the LRH-150-12 terminal interface and low-profile chassis are distinct from the equipment&#x27;s cable-entry hardware.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Use_the_LRH-150-12_as_a_chassis-mounted_example\"><\/span>Use the LRH-150-12 as a chassis-mounted example<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>c\u00e1c <a href=\"https:\/\/www.wehopower.com\/vi\/product\/lrh-150-380vac-input-voltage-ac-to-dc-switching-power-supply\/\">WEHO LRH-150 family<\/a> illustrates why the enclosure and power supply must remain separate design items. The referenced LRH-150-12 is a vented, low-profile metal supply measuring 159 \u00d7 97 \u00d7 30 mm. Its source label states a 300\u2013450 VAC input and a 12 V, 12.5 A output. It is not a universal-input unit and must not be selected for a supply outside that input window.<\/p>\n<p>The terminal arrangement is L1, L2, protective earth, two negative output positions and two positive output positions. The drawing identifies bottom M3 mounting provisions. A gland belongs in the equipment&#8217;s designed cable entry, not in a newly drilled hole in this power supply case. The supply&#8217;s screw terminals and transparent terminal cover do not replace enclosure-level cable retention.<\/p>\n<p>Lay out the supply, gland and clamps together. Keep its ventilation openings clear, leave access to the terminal cover, and route wiring without pressing it against sharp sheet-metal edges. Fixing details and conductor preparation still require the delivered product&#8217;s instructions; the photograph is not a wiring acceptance document.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Separate_external_pulling_forces_from_the_final_connection\"><\/span>Separate external pulling forces from the final connection<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Consider what happens when an installer draws cable through the entry or when a technician opens a service panel. If the external cable moves, that movement should be controlled at the intended retaining hardware, not transferred directly into a short, tight conductor at the supply terminal. Support the cable jacket where the clamp is intended to grip it, then provide the required transition to individual conductors.<\/p>\n<p>Leave enough controlled slack for the planned service operation, without draping a loose loop across ventilation slots or allowing it to rub on a moving part. Follow the cable manufacturer&#8217;s bend-radius guidance. Cable routing should also preserve the separation and insulation provisions specified by the equipment&#8217;s electrical design; an attractive photograph cannot establish those requirements.<\/p>\n<figure data-image-role=\"application_b\"><img decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-b-69.png?quality=85&#038;strip=all\" alt=\"Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals  title=\" width=\"1536\" height=\"1024\" cable glands and strain relief: keep loads away from power supply terminals title=\"\"><figcaption>A separate label-applicator layout at the mechanical assembly stage. Retained, capped cables leave the seven supply terminals empty while access and routing are reviewed.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Review_the_assembly_before_energizing_it\"><\/span>Review the assembly before energizing it<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A useful mechanical inspection is performed while the equipment is isolated. Check that the gland is secured to the enclosure, its seals and locknut are installed as specified, and the clamp actually grips the intended jacket rather than a loose sleeve. Verify that the cable route remains stable through the intended service movement. Then check that the final electrical terminations can be made without pulling the conductors taut.<\/p>\n<p>Record the actual gland part number, cable diameter and clamp arrangement on the equipment drawing. If a cable supplier changes the jacket diameter, revisit the gland selection instead of assuming that the conductor size guarantees the same fit. Have the responsible qualified person define and perform any required retention or electrical tests; the visual inspection is only one part of acceptance.<\/p>\n<figure data-image-role=\"engineering_context\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-72.png?quality=85&#038;strip=all\" alt=\"Cable Glands and Strain Relief: Keep Cable Loads Away from Power Supply Terminals  title=\" width=\"1536\" height=\"1024\" cable glands and strain relief: keep loads away from power supply terminals title=\"\"><figcaption>Specify the full mechanical path. Acceptance criteria come from the selected components and equipment design, not from the diagram.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_asked_questions\"><\/span>Frequently asked questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Does_the_correct_gland_thread_guarantee_a_correct_cable_fit\"><\/span>Does the correct gland thread guarantee a correct cable fit?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Thread size describes the enclosure interface; the gland&#8217;s specified clamping range must separately cover the actual cable jacket diameter. Check both before buying.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_the_terminal_screws_serve_as_strain_relief\"><\/span>Can the terminal screws serve as strain relief?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Design the cable support to keep pulling and twisting loads away from the electrical termination. The terminal connection must be assembled according to its own instructions, not tightened harder to compensate for an unsupported cable.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_an_IP-rated_gland_make_a_vented_supply_waterproof\"><\/span>Does an IP-rated gland make a vented supply waterproof?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. The entry component&#8217;s rating does not establish the protection of the complete enclosure, and it does not change the vented power supply into a sealed product.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Send_the_cable_and_enclosure_details_with_the_power_supply_enquiry\"><\/span>Send the cable and enclosure details with the power supply enquiry<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a practical review, provide the input voltage, output load, actual cable outside diameters, enclosure entry drawing, service movement and environmental conditions. Include a photo or sketch showing the gland-to-terminal route. <a href=\"https:\/\/www.wehopower.com\/vi\/contact\/\">Li\u00ean h\u1ec7 v\u1edbi WEHO<\/a> to confirm the power supply model and mounting information, while the equipment designer and gland supplier confirm the cable-entry and retention requirements.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>Match the cable entry and internal support so mechanical loads do not reach the electrical connection.<\/p>","protected":false},"author":2,"featured_media":19166,"parent":0,"menu_order":60,"comment_status":"closed","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,284],"class_list":["post-19170","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/19170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/comments?post=19170"}],"version-history":[{"count":1,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/19170\/revisions"}],"predecessor-version":[{"id":19620,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/19170\/revisions\/19620"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/media\/19166"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/media?parent=19170"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news_category?post=19170"}],"curies":[{"name":"wp c\u1ee7a t\u00f4i","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}