{"id":525,"date":"2024-08-17T11:25:36","date_gmt":"2024-08-17T09:25:36","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=525"},"modified":"2025-09-27T17:50:23","modified_gmt":"2025-09-27T15:50:23","slug":"clause-3-how-to-understand-the-definition-of-class-ii-appliance","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/th\/clause-3-how-to-understand-the-definition-of-class-ii-appliance\/","title":{"rendered":"\u0e02\u0e49\u0e2d 3 \u2013 \u0e27\u0e34\u0e18\u0e35\u0e17\u0e33\u0e04\u0e27\u0e32\u0e21\u0e40\u0e02\u0e49\u0e32\u0e43\u0e08\u0e04\u0e33\u0e08\u0e33\u0e01\u0e31\u0e14\u0e04\u0e27\u0e32\u0e21\u0e02\u0e2d\u0e07 \u201c\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II\u201d"},"content":{"rendered":"\u0e09\u0e19\u0e27\u0e19\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19 <strong>\u0e40\u0e09\u0e1e\u0e32\u0e30\u0e41\u0e15\u0e48\u0e42\u0e14\u0e22\u0e08\u0e31\u0e14\u0e43\u0e2b\u0e49\u0e21\u0e35\u0e21\u0e32\u0e15\u0e23\u0e01\u0e32\u0e23\u0e1b\u0e49\u0e2d\u0e07\u0e01\u0e31\u0e19\u0e04\u0e27\u0e32\u0e21\u0e1b\u0e25\u0e2d\u0e14\u0e20\u0e31\u0e22\u0e40\u0e1e\u0e34\u0e48\u0e21\u0e40\u0e15\u0e34\u0e21 \u0e40\u0e0a\u0e48\u0e19 <\/strong>\u0e09\u0e19\u0e27\u0e19\u0e2a\u0e2d\u0e07\u0e0a\u0e31\u0e49\u0e19 <strong>\u0e2b\u0e23\u0e37\u0e2d <\/strong>\u0e09\u0e19\u0e27\u0e19\u0e40\u0e2a\u0e23\u0e34\u0e21\u0e41\u0e23\u0e07 <strong> \u0e44\u0e21\u0e48\u0e21\u0e35\u0e02\u0e49\u0e2d\u0e01\u0e33\u0e2b\u0e19\u0e14\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e01\u0e32\u0e23\u0e15\u0e48\u0e2d\u0e2a\u0e32\u0e22\u0e14\u0e34\u0e19\u0e2b\u0e23\u0e37\u0e2d\u0e01\u0e32\u0e23\u0e1e\u0e36\u0e48\u0e07\u0e1e\u0e32\u0e40\u0e07\u0e37\u0e48\u0e2d\u0e19\u0e44\u0e02\u0e01\u0e32\u0e23\u0e15\u0e34\u0e14\u0e15\u0e31\u0e49\u0e07<\/strong>\u0e2b\u0e21\u0e32\u0e22\u0e40\u0e2b\u0e15\u0e38 1 \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e14\u0e31\u0e07\u0e01\u0e25\u0e48\u0e32\u0e27\u0e2d\u0e32\u0e08\u0e21\u0e35\u0e1b\u0e23\u0e30\u0e40\u0e20\u0e17\u0e43\u0e14\u0e1b\u0e23\u0e30\u0e40\u0e20\u0e17\u0e2b\u0e19\u0e36\u0e48\u0e07\u0e15\u0e48\u0e2d\u0e44\u0e1b\u0e19\u0e35\u0e49: <br><em>\u2013 \u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e43\u0e0a\u0e49\u0e44\u0e1f\u0e1f\u0e49\u0e32\u0e17\u0e35\u0e48\u0e21\u0e35\u0e40\u0e1b\u0e25\u0e37\u0e2d\u0e01\u0e2b\u0e38\u0e49\u0e21\u0e17\u0e35\u0e48\u0e17\u0e19\u0e17\u0e32\u0e19\u0e41\u0e25\u0e30\u0e15\u0e48\u0e2d\u0e40\u0e19\u0e37\u0e48\u0e2d\u0e07\u0e01\u0e31\u0e19\u0e21\u0e32\u0e01\u0e40\u0e1b\u0e47\u0e19\u0e27\u0e31\u0e2a\u0e14\u0e38\u0e09\u0e19\u0e27\u0e19\u0e0b\u0e36\u0e48\u0e07\u0e2b\u0e48\u0e2d\u0e2b\u0e38\u0e49\u0e21\u0e2a\u0e48\u0e27\u0e19\u0e17\u0e35\u0e48\u0e40\u0e1b\u0e47\u0e19\u0e42\u0e25\u0e2b\u0e30\u0e17\u0e31\u0e49\u0e07\u0e2b\u0e21\u0e14 \u0e22\u0e01\u0e40\u0e27\u0e49\u0e19\u0e2a\u0e48\u0e27\u0e19\u0e15\u0e48\u0e32\u0e07\u0e46 \u0e40\u0e0a\u0e48\u0e19 \u0e41\u0e1c\u0e48\u0e19\u0e1b\u0e49\u0e32\u0e22 \u0e2b\u0e21\u0e38\u0e14\u0e40\u0e01\u0e25\u0e35\u0e22\u0e27 \u0e41\u0e25\u0e30\u0e2b\u0e21\u0e38\u0e14\u0e22\u0e49\u0e33 \u0e0b\u0e36\u0e48\u0e07\u0e41\u0e22\u0e01\u0e2d\u0e2d\u0e01\u0e08\u0e32\u0e01<br>\u0e2a\u0e48\u0e27\u0e19\u0e17\u0e35\u0e48\u0e16\u0e48\u0e32\u0e22\u0e17\u0e2d\u0e14\u0e2a\u0e14 <strong>\u0e42\u0e14\u0e22\u0e09\u0e19\u0e27\u0e19\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e19\u0e49\u0e2d\u0e22\u0e40\u0e17\u0e35\u0e22\u0e1a\u0e40\u0e17\u0e48\u0e32\u0e01\u0e31\u0e1a <\/strong>\u0e09\u0e19\u0e27\u0e19\u0e40\u0e2a\u0e23\u0e34\u0e21\u0e41\u0e23\u0e07 <strong>\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II<\/strong>\u2013 \u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e43\u0e0a\u0e49\u0e44\u0e1f\u0e1f\u0e49\u0e32\u0e17\u0e35\u0e48\u0e21\u0e35\u0e40\u0e1b\u0e25\u0e37\u0e2d\u0e01\u0e2b\u0e38\u0e49\u0e21\u0e42\u0e25\u0e2b\u0e30\u0e17\u0e35\u0e48\u0e15\u0e48\u0e2d\u0e40\u0e19\u0e37\u0e48\u0e2d\u0e07\u0e01\u0e31\u0e19\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e21\u0e32\u0e01 \u0e42\u0e14\u0e22\u0e17\u0e35\u0e48 <strong>\u0e09\u0e19\u0e27\u0e19\u0e2a\u0e2d\u0e07\u0e0a\u0e31\u0e49\u0e19<\/strong>;<br>\u0e2b\u0e23\u0e37\u0e2d <strong>\u0e09\u0e19\u0e27\u0e19\u0e40\u0e2a\u0e23\u0e34\u0e21\u0e41\u0e23\u0e07 <\/strong>\u0e16\u0e39\u0e01\u0e43\u0e0a\u0e49\u0e15\u0e25\u0e2d\u0e14; \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e14\u0e31\u0e07\u0e01\u0e25\u0e48\u0e32\u0e27\u0e40\u0e23\u0e35\u0e22\u0e01\u0e27\u0e48\u0e32\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e2b\u0e38\u0e49\u0e21\u0e42\u0e25\u0e2b\u0e30 <strong>\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II <\/strong>\u2013 \u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e43\u0e0a\u0e49\u0e44\u0e1f\u0e1f\u0e49\u0e32\u0e17\u0e35\u0e48\u0e21\u0e35\u0e09\u0e19\u0e27\u0e19\u0e2b\u0e38\u0e49\u0e21\u0e2d\u0e22\u0e39\u0e48\u0e23\u0e27\u0e21\u0e01\u0e31\u0e19 <strong>\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II<\/strong>;<br>\u0e41\u0e25\u0e30\u0e2b\u0e38\u0e49\u0e21\u0e14\u0e49\u0e27\u0e22\u0e42\u0e25\u0e2b\u0e30 <strong>\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II <\/strong>\u0e2b\u0e21\u0e32\u0e22\u0e40\u0e2b\u0e15\u0e38 2 \u0e01\u0e23\u0e2d\u0e1a\u0e2b\u0e38\u0e49\u0e21\u0e02\u0e2d\u0e07\u0e09\u0e19\u0e27\u0e19\u0e2b\u0e38\u0e49\u0e21 <strong>\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II<\/strong>.<br>\u0e2d\u0e32\u0e08\u0e1b\u0e23\u0e30\u0e01\u0e2d\u0e1a\u0e40\u0e1b\u0e47\u0e19\u0e1a\u0e32\u0e07\u0e2a\u0e48\u0e27\u0e19\u0e2b\u0e23\u0e37\u0e2d\u0e17\u0e31\u0e49\u0e07\u0e2b\u0e21\u0e14 <strong>\u0e09\u0e19\u0e27\u0e19\u0e40\u0e2a\u0e23\u0e34\u0e21 <\/strong>\u0e2b\u0e23\u0e37\u0e2d\u0e02\u0e2d\u0e07 <strong>\u0e09\u0e19\u0e27\u0e19\u0e40\u0e2a\u0e23\u0e34\u0e21\u0e41\u0e23\u0e07 <\/strong>\u0e23\u0e39\u0e1b\u0e17\u0e35\u0e48 11 \u2013 \u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e23\u0e30\u0e22\u0e30\u0e2b\u0e48\u0e32\u0e07\u0e43\u0e19\u0e21\u0e32\u0e15\u0e23\u0e10\u0e32\u0e19 IEC 60335-1 \u0e40\u0e1b\u0e47\u0e19\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e07\u0e48\u0e32\u0e22\u0e46 \u0e08\u0e32\u0e01\u0e15\u0e31\u0e27\u0e40\u0e25\u0e02\u0e19\u0e35\u0e49 \u0e40\u0e23\u0e32\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e04\u0e34\u0e14\u0e16\u0e36\u0e07\u0e04\u0e38\u0e13\u0e25\u0e31\u0e01\u0e29\u0e13\u0e30\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19\u0e02\u0e2d\u0e07\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a II \u0e42\u0e04\u0e23\u0e07\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e04\u0e25\u0e32\u0e2a II \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e25\u0e32\u0e2a I \u0e41\u0e25\u0e30\u0e01\u0e32\u0e23\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e04\u0e25\u0e32\u0e2a I <strong><a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-reinforced-insulation\/\" target=\"_blank\"><strong>reinforced insulation<\/strong><\/a><\/strong>.<\/em><br>\nHere we think from the perspective of double precautions. In addition to <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-basic-insulation\/\" target=\"_blank\"><strong>basic insulation<\/strong><\/a>, the product also needs another layer of insulation, that is, <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-double-insulation\/\" target=\"_blank\"><strong>double insulation<\/strong><\/a> measures to ensure that if any layer of insulation fails, there will be another layer of insulation to still play a protective role. The anti-electric shock effect of reinforced insulation is equivalent to double insulation in most cases, so it is also considered to be an effective way of double precautions. Class II appliances defined by the standard mainly emphasize that the appliance achieves the effect of double insulations through its own casing, insulated wires, and sheaths of insulated wires. Appliances with earthing measures are Class I appliances, so Class II appliances do not have protective earthing.<br><br>Except for Class 0 appliances, all appliances with large area plastic or insulating housings are generally designed as Class II appliances. However, there are also some motors with a metal housing, although the product can meet the requirements of Class II appliances, there is still a protective earthing measure on the motor. This appliance is considered a <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-class-i-appliance\/\" target=\"_blank\"><strong>class I appliance<\/strong><\/a>. The notes to this clause give an introduction to the structural features of all possible Class II appliances.<br>\n<figure class=\"wp-block-image size-full\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"778\" height=\"378\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/class-II-appliance-1.png\" alt=\"\" class=\"wp-image-496\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/class-II-appliance-1.png 778w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/class-II-appliance-1-300x146.png 300w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/class-II-appliance-1-768x373.png 768w\" sizes=\"auto, (max-width: 778px) 100vw, 778px\" \/><br>\n<\/figure><br>\nFigure 11 \u2013 Examples of clearances in the IEC 60335-1 standard gives a simple example. Based on this figure, we can think about the basic characteristics of <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-class-ii-appliance\/\" target=\"_blank\"><strong>class II appliance<\/strong><\/a>, <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-class-ii-construction\/\" target=\"_blank\"><strong>class II construction<\/strong><\/a>, class I appliance, and class I construction.<br>","protected":false},"excerpt":{"rendered":"<p>\u0e09\u0e19\u0e27\u0e19\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19 \u0e40\u0e09\u0e1e\u0e32\u0e30\u0e41\u0e15\u0e48\u0e42\u0e14\u0e22\u0e08\u0e31\u0e14\u0e43\u0e2b\u0e49\u0e21\u0e35\u0e21\u0e32\u0e15\u0e23\u0e01\u0e32\u0e23\u0e1b\u0e49\u0e2d\u0e07\u0e01\u0e31\u0e19\u0e04\u0e27\u0e32\u0e21\u0e1b\u0e25\u0e2d\u0e14\u0e20\u0e31\u0e22\u0e40\u0e1e\u0e34\u0e48\u0e21\u0e40\u0e15\u0e34\u0e21 \u0e40\u0e0a\u0e48\u0e19 \u0e09\u0e19\u0e27\u0e19\u0e2a\u0e2d\u0e07\u0e0a\u0e31\u0e49\u0e19 \u0e2b\u0e23\u0e37\u0e2d 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