{"id":2449,"date":"2026-10-06T12:27:58","date_gmt":"2026-10-06T12:27:58","guid":{"rendered":"https:\/\/yocl.com\/?wpr2_import=ead594f9d9c11fb225c256c9f39ca77ae863f2ba029eb1b65f6a0911e35d1b1d"},"modified":"2026-10-06T12:27:58","modified_gmt":"2026-10-06T12:27:58","slug":"wire-ferrule-size-chart","status":"publish","type":"post","link":"https:\/\/yocl.com\/tr\/wire-ferrule-size-chart\/","title":{"rendered":"Wire Ferrule Size Chart: AWG, mm\u00b2 and Barrel Length"},"content":{"rendered":"<p>Use the first chart to look up <strong>calculated American Wire Gauge (AWG) conductor area<\/strong>. Use the second to look up <strong>YOCL&#8217;s declared metric ferrule sizes and lengths<\/strong>. Conversion does not approve an AWG wire for a metric model. For E-series ferrules, <strong>F is exposed metal length; L includes the collar<\/strong>.<\/p>\n<h2>AWG to mm\u00b2: calculated conductor-area chart<\/h2>\n<p>These values exclude insulation and are geometric references, not ferrule ratings or measurements of a particular stranded cable. Areas are calculated from the AWG progression in <a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/Legacy\/hb\/nbshandbook100.pdf\" target=\"_blank\" rel=\"noopener\">NIST\/NBS <em>Copper Wire Tables<\/em>, section 2.2<\/a>, using <a href=\"https:\/\/www.nist.gov\/pml\/owm\/si-units-length\" target=\"_blank\" rel=\"noopener\">NIST&#8217;s exact inch-to-millimetre conversion<\/a>.<\/p>\n<table>\n<thead>\n<tr>\n<th>AWG size<\/th>\n<th align=\"right\">Calculated area (mm\u00b2), rounded to 3 decimals<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>28<\/td>\n<td align=\"right\">0.081<\/td>\n<\/tr>\n<tr>\n<td>26<\/td>\n<td align=\"right\">0.129<\/td>\n<\/tr>\n<tr>\n<td>24<\/td>\n<td align=\"right\">0.205<\/td>\n<\/tr>\n<tr>\n<td>22<\/td>\n<td align=\"right\">0.326<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td align=\"right\">0.518<\/td>\n<\/tr>\n<tr>\n<td>18<\/td>\n<td align=\"right\">0.823<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td align=\"right\">1.309<\/td>\n<\/tr>\n<tr>\n<td>14<\/td>\n<td align=\"right\">2.081<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td align=\"right\">3.309<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td align=\"right\">5.261<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td align=\"right\">8.366<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td align=\"right\">10.549<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td align=\"right\">13.302<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td align=\"right\">16.773<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td align=\"right\">21.151<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td align=\"right\">26.670<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td align=\"right\">33.631<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td align=\"right\">42.408<\/td>\n<\/tr>\n<tr>\n<td>1\/0<\/td>\n<td align=\"right\">53.475<\/td>\n<\/tr>\n<tr>\n<td>2\/0<\/td>\n<td align=\"right\">67.431<\/td>\n<\/tr>\n<tr>\n<td>3\/0<\/td>\n<td align=\"right\">85.029<\/td>\n<\/tr>\n<tr>\n<td>4\/0<\/td>\n<td align=\"right\">107.219<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For numerical gauge input <code>n<\/code>, the calculation is:<\/p>\n<ul>\n<li><code>d = 0.127 \u00d7 92^((36 \u2212 n) \/ 39)<\/code>, with diameter <code>d<\/code> in mm.<\/li>\n<li><code>A = \u03c0 \u00d7 d\u00b2 \/ 4<\/code>, with area <code>A<\/code> in mm\u00b2.<\/li>\n<\/ul>\n<p>Use <code>n = 0<\/code> for 1\/0, <code>\u22121<\/code> for 2\/0, <code>\u22122<\/code> for 3\/0 and <code>\u22123<\/code> for 4\/0. Round only the final area; tables using rounded diameters may differ.<\/p>\n<h3>A conversion is not a ferrule assignment<\/h3>\n<p><strong>Example: 18 AWG \u2192 0.823 mm\u00b2, calculated.<\/strong> This is not a metric ferrule approval. Do not select a model by rounding to the nearest metric row or automatically moving up one size.<\/p>\n<p>IEC 60228 defines nominal cross-sectional area as a conductor-size identifier rather than a quantity determined by direct measurement. This reinforces the distinction between a reference calculation and a declared nominal size. <a href=\"https:\/\/cdn.standards.iteh.ai\/samples\/107432\/b61505bac784419dbb634df3767e77d5\/IEC-60228-2023.pdf\" target=\"_blank\" rel=\"noopener\">IEC 60228:2023 preview, clause 3.2<\/a>.<\/p>\n<p>For an AWG cable, confirm the <strong>exact AWG size in the ferrule&#8217;s documented wire range<\/strong>, together with conductor construction and the applicable tooling. The metric table below does not establish those AWG approvals.<\/p>\n<h2>Metric ferrule size and barrel-length chart<\/h2>\n<p>YOCL <a href=\"https:\/\/yocl.com\/tr\/product\/e-series-pre-insulated-wire-ferrules\/\">E-series catalogue<\/a>: declared model dimensions.<\/p>\n<table>\n<thead>\n<tr>\n<th>Declared conductor size (mm\u00b2)<\/th>\n<th>Listed F options (mm)<\/th>\n<th>\u00d6rnek model<\/th>\n<th align=\"right\">Exposed barrel F (mm)<\/th>\n<th align=\"right\">Overall L (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0.25<\/td>\n<td>6, 8<\/td>\n<td>E0208<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">12.5<\/td>\n<\/tr>\n<tr>\n<td>0.34<\/td>\n<td>6, 8<\/td>\n<td>E0308<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">12.5<\/td>\n<\/tr>\n<tr>\n<td>0.5<\/td>\n<td>6, 8, 10, 12<\/td>\n<td>E0508<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">14<\/td>\n<\/tr>\n<tr>\n<td>0.75<\/td>\n<td>6, 8, 10, 12<\/td>\n<td>E7508<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">14.6<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>6, 8, 10, 12<\/td>\n<td>E1008<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">14.7<\/td>\n<\/tr>\n<tr>\n<td>1.5<\/td>\n<td>8, 10, 12, 18<\/td>\n<td>E1508<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">15<\/td>\n<\/tr>\n<tr>\n<td>2.5<\/td>\n<td>8, 10, 12, 18<\/td>\n<td>E2508<\/td>\n<td align=\"right\">8<\/td>\n<td align=\"right\">15.2<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>9, 12, 18<\/td>\n<td>E4009<\/td>\n<td align=\"right\">9<\/td>\n<td align=\"right\">16.5<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>10, 12, 18<\/td>\n<td>E6010<\/td>\n<td align=\"right\">10<\/td>\n<td align=\"right\">18<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>12, 18<\/td>\n<td>E10-12<\/td>\n<td align=\"right\">12<\/td>\n<td align=\"right\">21.5<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>12, 18<\/td>\n<td>E16-12<\/td>\n<td align=\"right\">12<\/td>\n<td align=\"right\">22.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Read the exposed barrel and overall length separately<\/h3>\n<p>F spans nose to collar shoulder, excluding under-collar metal. L includes the collar. Neither is a stripping instruction.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/yocl.com\/wp-content\/uploads\/2026\/10\/wire-ferrule-size-chart-barrel-vs-overall-length.webp\" alt=\"E1508 and E1512 with exposed F and overall L spans\"><br \/>\n<\/figure>\n<p><strong>Worked lookup, 1.5 mm\u00b2:<\/strong> E1508 has F\/L = 8\/15 mm; E1512 has F\/L = 12\/19 mm. Check terminal documentation before choosing.<\/p>\n<p>These labels follow this series drawing; check other constructions separately.<\/p>\n<h2>Twin ferrule notation: read the size of each wire<\/h2>\n<p><strong>2 \u00d7 1.5 mm\u00b2 means two conductors, each nominally 1.5 mm\u00b2.<\/strong> Their areas add arithmetically to 3 mm\u00b2, but a twin ferrule is not thereby interchangeable with a single-wire 3 mm\u00b2 ferrule. Entry geometry, tooling and the receiving terminal&#8217;s permitted arrangement still need checking.<\/p>\n<p>YOCL\u2019n\u0131n <a href=\"https:\/\/yocl.com\/tr\/product\/te-twin-cord-end-connectors\/\">TE twin ferrule catalogue<\/a> declares TE 1508 as <strong>2 \u00d7 1.5 mm\u00b2<\/strong>, with F = 8 mm and L = 15.5 mm.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/yocl.com\/wp-content\/uploads\/2026\/10\/wire-ferrule-size-chart-conductor-size-and-twin-notation.webp\" alt=\"Conceptual twin ferrule with two separately identified 1.5 square millimetre conductors, showing that conductor area excludes insulation\"><figcaption>Twin size is stated per conductor. The illustration does not establish a terminal&#8217;s approval for two wires.<\/figcaption><\/figure>\n<p>Halka a\u00e7\u0131kl\u0131\u011f\u0131 <strong>UL 486F<\/strong> covers ferrules for one stranded copper conductor or two stranded copper conductors of the same size. That scope explains the arrangement; it does not establish UL certification or a terminal approval for these YOCL examples. <a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?productId=UL486f\" target=\"_blank\" rel=\"noopener\">UL 486F official public scope<\/a>.<\/p>\n<h2>Check the receiving terminal before choosing a length<\/h2>\n<p>Listed F options are not universal length recommendations. A size-chart row identifies dimensions; the receiving device determines the permitted prepared-conductor arrangement and length requirements.<\/p>\n<p>For connectors within its scope, <strong>UL 486A-486B<\/strong> allows ferrules evaluated under UL 486F within their ratings and installation instructions, while retaining the connector manufacturer&#8217;s exposed-conductive-length requirements. This is a standards-scope boundary, not permission to infer stripping length from F or L. <a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=48038\" target=\"_blank\" rel=\"noopener\">UL 486A-486B, public scope, section 1.2<\/a>.<\/p>\n<p>Before ordering, confirm:<\/p>\n<ul>\n<li>The conductor material, exact size, construction and single\/twin arrangement covered by the ferrule documentation.<\/li>\n<li>The receiving terminal&#8217;s permitted ferruled-conductor range and preparation requirements.<\/li>\n<li>The required exposed metal length, overall clearance and collar fit.<\/li>\n<li>The applicable ferrule\/tool combination and finished profile.<\/li>\n<\/ul>\n<p>Use the full catalogue model code. Collar colour alone does not establish capacity, and code patterns are not universal across suppliers.<\/p>\n<p>For construction and compatibility context, read <a href=\"https:\/\/yocl.com\/tr\/what-is-a-wire-ferrule\/\">what a wire ferrule is<\/a>. To review parts, use the <a href=\"https:\/\/yocl.com\/tr\/wire-ferrules-manufacturer\/\">YOCL tel-y\u00fcks\u00fck aral\u0131\u011f\u0131<\/a> and send the exact wire size and count, required exposed length, receiving terminal reference and quantity.<\/p>\n<h2>Referanslar<\/h2>\n<ul>\n<li>NIST\/NBS \u2014 <a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/Legacy\/hb\/nbshandbook100.pdf\" target=\"_blank\" rel=\"noopener\"><em>Copper Wire Tables<\/em>, Handbook 100<\/a>, 1966, section 2.2; AWG geometric progression used for this article&#8217;s calculations.<\/li>\n<li>NIST \u2014 <a href=\"https:\/\/www.nist.gov\/pml\/owm\/si-units-length\" target=\"_blank\" rel=\"noopener\"><em>SI Units \u2013 Length<\/em><\/a>; exact 25.4 mm per inch conversion.<\/li>\n<li>IEC \u2014 <a href=\"https:\/\/cdn.standards.iteh.ai\/samples\/107432\/b61505bac784419dbb634df3767e77d5\/IEC-60228-2023.pdf\" target=\"_blank\" rel=\"noopener\"><em>IEC 60228:2023 preview<\/em><\/a>, clause 3.2; nominal cross-sectional area. Original IEC preview hosted by iTeh; full standard not consulted.<\/li>\n<li>YOCL \u00fcr\u00fcn bilgileri \u2014 <a href=\"https:\/\/yocl.com\/tr\/product\/e-series-pre-insulated-wire-ferrules\/\"><em>E-series ferrules<\/em><\/a>; declared metric dimensions and external F\/L spans.<\/li>\n<li>YOCL \u00fcr\u00fcn bilgileri \u2014 <a href=\"https:\/\/yocl.com\/tr\/product\/te-twin-cord-end-connectors\/\"><em>TE \u00c7ift Kablo Ucu Konnekt\u00f6rleri<\/em><\/a>; per-conductor size and model dimensions.<\/li>\n<li>UL Standartlar ve Etkile\u015fim \u2014 <a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?productId=UL486f\" target=\"_blank\" rel=\"noopener\"><em>UL 486F: Bare and Covered Ferrules<\/em><\/a>, edition 3, 2024, revised August 28, 2026; public scope only.<\/li>\n<li>UL Standartlar ve Etkile\u015fim \u2014 <a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=48038\" target=\"_blank\" rel=\"noopener\"><em>UL 486A-486B: Tel Konnekt\u00f6rleri<\/em><\/a>, edition 4, March 14, 2025; public scope only, section 1.2.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Use the first chart to look up calculated American Wire Gauge (AWG) conductor area. Use the second to look up YOCL&#8217;s declared metric ferrule sizes and lengths. Conversion does not approve an AWG wire for a metric model. For E-series ferrules, F is exposed metal length; L includes the collar. AWG to mm\u00b2: calculated conductor-area [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2448,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[164],"tags":[],"class_list":["post-2449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-terminals-connections"],"_links":{"self":[{"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/posts\/2449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/comments?post=2449"}],"version-history":[{"count":1,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/posts\/2449\/revisions"}],"predecessor-version":[{"id":2450,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/posts\/2449\/revisions\/2450"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/media\/2448"}],"wp:attachment":[{"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/media?parent=2449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/categories?post=2449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yocl.com\/tr\/wp-json\/wp\/v2\/tags?post=2449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}