{"id":17910,"date":"2026-01-22T14:00:00","date_gmt":"2026-01-22T13:00:00","guid":{"rendered":"https:\/\/rdcomponents.com\/site\/?p=17910"},"modified":"2026-06-03T10:52:30","modified_gmt":"2026-06-03T08:52:30","slug":"203-conduttivita-elettrica","status":"publish","type":"post","link":"https:\/\/rdcomponents.com\/site\/2026\/01\/22\/203-conduttivita-elettrica\/","title":{"rendered":"#203 Conduttivit\u00e0 elettrica"},"content":{"rendered":"\n
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Se un connettore serve solo a collegare<\/a> un\u00a0termostato bimetallico<\/a>\u00a0(o un\u00a0protettore termico<\/a>) a un circuito elettrico, dall\u2019altra parte tale circuito viene alimentato dalla corrente elettrica che scorre attraverso i cavi elettrici oppure nei circuiti stampati<\/a>. Questo passaggio di corrente consente il funzionamento di una macchina o di un componente di essa. Come, ad esempio, una resistenza elettrica o un motore elettrico. Ma che cosa hanno di cos\u00ec particolare i cavi elettrici?<\/p>\n\n\n\n

I\u00a0cavi elettrici<\/strong>\u00a0sono l\u2019elemento attraverso il quale passa la corrente elettrica che alimenta una macchina o pi\u00f9 in generale un circuito elettrico. Sono costituiti da un\u00a0conduttore<\/strong>, in genere un filo di rame nudo o placcato con\u00a0stagno<\/strong>,\u00a0argento\u00a0<\/strong>o\u00a0nichel\u00a0<\/strong>oppure pi\u00f9 raramente in\u00a0alluminio<\/strong>, a seconda dell\u2019applicazione e delle caratteristiche dei materiali<\/a>. Viene infine avvolto da un isolante per evitare che si crei un corto circuito.<\/p>\n\n\n\n

Il conduttore pu\u00f2 essere formato da un filo unico, detto\u00a0rigido<\/strong>, oppure dall\u2019insieme di pi\u00f9 fili, e in questo caso prende il nome di\u00a0trefolo<\/strong>. Questo rende il cavo pi\u00f9 flessibile ma nello stesso tempo resistente.<\/p>\n\n\n

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La sezione del singolo filo del conduttore \u00e8 un elemento molto importante per determinare l\u2019intensit\u00e0 massima di corrente che pu\u00f2 scorrere attraverso il cavo. Per determinare ci\u00f2 con precisione sono stati sviluppati diversi sistemi di classificazione. Il pi\u00f9 comune e standardizzato attualmente \u00e8 il\u00a0sistema\u00a0AWG<\/strong>,\u00a0American Wire Gauge<\/strong>. Venne utilizzato per la prima volta nel\u00a01857\u00a0<\/strong>negli Stati Uniti e in Canada. Questo sistema classifica i diversi diametri dei cavi attribuendo una numerazione da\u00a00000<\/strong>\u00a0[4\/0<\/strong>] a\u00a040 AWG<\/strong>. La versione definitiva di questo sistema \u00e8 stata messa a punto nel\u00a01957\u00a0<\/strong>da\u00a0Joseph Rogers Brown<\/strong>\u00a0della societ\u00e0\u00a0Brown & Sharpe<\/strong>, produttori di strumenti di misura. Per questo motivo il sistema\u00a0AWG\u00a0<\/strong>\u00e8 anche noto come sistema\u00a0Brown and Sharpe wire gauge<\/strong>\u00a0(B&S<\/strong>).<\/p>\n\n\n\n

Il valore di\u00a0AWG\u00a0<\/strong>\u00e8 espresso come numero intero e ad ogni valore corrisponde una dimensione specifica (in\u00a0mm<\/strong>,\u00a0pollici<\/strong>,\u00a0mm2<\/strong>\u00a0o\u00a0kcmil<\/strong>). In questo sistema, all’aumentare del numero misurato corrisponde la dimensione del filo che sar\u00e0 progressivamente sempre pi\u00f9 piccola. Pertanto, un\u00a020AWG<\/strong>\u00a0avr\u00e0 un diametro superiore a un\u00a024AWG<\/strong>.<\/p>\n\n\n\n

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Estratto dalla tabella all’indirizzo https:\/\/it.wikipedia.org\/wiki\/American_wire_gauge<\/a><\/em><\/p>\n\n\n\n

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Un diametro del cavo maggiore consente una maggiore portata in\u00a0Ampere<\/strong>\u00a0[A<\/strong>]. Perci\u00f2 \u00e8 importante per qualsiasi dispositivo di controllo termico (protettori termici<\/a>\u00a0o\u00a0sonde di temperatura<\/a>) poter adattare un cavo idoneo alle prestazioni che saranno richieste. Per poterlo fare \u00e8 necessario che i partner con cui si collabora abbiano la giusta flessibilit\u00e0 per fornire il prodotto con il cavo richiesto, anche quando questo \u00e8 fuori dallo standard. R&D Components<\/strong>\u00a0\u00e8 in grado di farlo, grazie alla sua fitta rete di partner altamente qualificati e preparati a sostenere le necessit\u00e0 dei clienti, indipendentemente dai volumi.<\/p>\n\n\n\n

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Se un connettore serve solo a collegare un\u00a0termostato bimetallico\u00a0(o un\u00a0protettore termico) a un circuito elettrico, dall\u2019altra parte tale circuito viene alimentato dalla corrente elettrica che scorre attraverso i cavi elettrici oppure nei circuiti stampati. Questo passaggio di corrente consente il funzionamento di una macchina o…<\/p>\n","protected":false},"author":2,"featured_media":17912,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[239,236],"tags":[1350,1343],"class_list":["post-17910","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-funzionamento-tecnico","category-prodotti","tag-conduttivita-elettrica","tag-connettori"],"yoast_head":"\n#203 Conduttivit\u00e0 elettrica -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/rdcomponents.com\/site\/2026\/01\/22\/203-conduttivita-elettrica\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"#203 Conduttivit\u00e0 elettrica -\" \/>\n<meta property=\"og:description\" content=\"Se un connettore serve solo a collegare un\u00a0termostato bimetallico\u00a0(o un\u00a0protettore termico) a un circuito elettrico, dall\u2019altra parte tale circuito viene alimentato dalla corrente elettrica che scorre attraverso i cavi elettrici oppure nei circuiti stampati. 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