{"id":4232,"date":"2026-09-23T00:00:00","date_gmt":"2026-09-23T00:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/?p=4232"},"modified":"2026-09-18T08:04:32","modified_gmt":"2026-09-18T08:04:32","slug":"single-pole-mcb-vs-double-pole-mcb","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/ar\/blog\/single-pole-mcb-vs-double-pole-mcb\/","title":{"rendered":"\u0642\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u0635\u063a\u0631 \u0627\u062d\u0627\u062f\u064a \u0627\u0644\u0642\u0637\u0628 \u0645\u0642\u0627\u0628\u0644 \u0642\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u0635\u063a\u0631 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0642\u0637\u0628"},"content":{"rendered":"<p>When a project role faced a selection problem, the visible failure often appeared before the real cause was understood. Aisha, a facilities engineer in Nairobi, replaced a two-pole isolating device with two unrelated single-pole units. A fault on the shared 240 V load left one conductor live. The root issue was misunderstanding common-trip and neutral-switching requirements.<\/p>\n<p><strong>\u0645\u0644\u062e\u0635:<\/strong> A single-pole MCB interrupts one live conductor; a double-pole MCB uses a linked mechanism to open two poles together. On 120\/240 V systems, the choice depends on whether both ungrounded conductors supply the load, whether the neutral must be switched, and what local code requires. This article keeps the decision evidence-led and separates product capability from installation responsibility.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/09\/single-pole-mcb-vs-double-pole-mcb-featured-v2-200k.webp\" alt=\"Single Pole Mcb Vs Double Pole Mcb featured application\" loading=\"eager\"\/><\/p>\n<h2>Pole count and common-trip<\/h2>\n<p>\u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 \u062a\u0628\u062f\u0623 \u0628\u062d\u062f\u0648\u062f \u0627\u0644\u062a\u0637\u0628\u064a\u0642. \u062d\u062f\u062f \u0627\u0644\u0645\u0635\u062f\u0631\u060c \u0648\u0627\u0644\u062d\u0645\u0644\u060c \u0648\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a\u060c \u0648\u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0639\u0637\u0644\u060c \u0648\u0628\u064a\u0626\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a. \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0630\u064a \u064a\u0628\u062f\u0648 \u0645\u0646\u0627\u0633\u0628\u0627\u064b \u0645\u0646 \u062d\u064a\u062b \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0623\u0645\u0628\u064a\u0631 \u0642\u062f \u064a\u0641\u0634\u0644 \u0645\u0639 \u0630\u0644\u0643 \u0641\u064a \u0623\u062f\u0627\u0621 \u0627\u0644\u0642\u0648\u0633 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0626\u064a\u0629\u060c \u0623\u0648 \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0623\u0648 \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628. \u0627\u0633\u062a\u062e\u062f\u0645 \u0645\u0646\u062d\u0646\u0649 \u0627\u0644\u062a\u064a\u0627\u0631 \u0648\u0627\u0644\u0632\u0645\u0646 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0648\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a \u0627\u0644\u0623\u0633\u0644\u0643\u064a\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0643\u0644\u063a\u0629 \u0645\u0634\u062a\u0631\u0643\u0629 \u0628\u064a\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u060c \u0648\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u0633\u0644\u064a\u0645.<\/p>\n<p>\u062a\u0648\u062b\u064a\u0642 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u0627\u062a \u0648\u0627\u062e\u062a\u0628\u0627\u0631\u0647\u0627 \u0641\u064a \u0627\u0644\u0644\u0648\u062d\u0629. \u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u064a\u062c\u0628 \u0623\u0646 \u062a\u0630\u0643\u0631 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u062a\u064a\u0627\u0631 \u0642\u0635\u0631 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0628\u062f\u0626\u064a \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0642\u0648\u0629 \u062a\u062d\u0645\u0644 \u0627\u0644\u0645\u0648\u0635\u0644\u060c \u0648\u0648\u0642\u062a \u0627\u0644\u0641\u0635\u0644 \u0627\u0644\u0645\u0637\u0644\u0648\u0628. \u0625\u0646 \u0627\u0644\u0637\u0631\u0642 \u0627\u0644\u0645\u0633\u0645\u0627\u0629 \u0645\u062b\u0644 \u0627\u062e\u062a\u0628\u0627\u0631 \u0627\u0644\u062d\u0642\u0646 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u060c \u0623\u0648 \u0627\u062e\u062a\u0628\u0627\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u0623\u0648 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062a\u0646\u0633\u064a\u0642 \u062a\u0643\u0648\u0646 \u0623\u0643\u062b\u0631 \u0641\u0627\u0626\u062f\u0629 \u0645\u0646 \u0627\u0644\u0628\u064a\u0627\u0646 \u0627\u0644\u0639\u0627\u0645 \u0628\u0623\u0646 \u0627\u0644\u0645\u0646\u062a\u062c \u0630\u0648 \u201c\u062f\u0631\u062c\u0629 \u0635\u0646\u0627\u0639\u064a\u0629\u201d.\u201d<\/p>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u062a\u062a\u063a\u064a\u0631 \u0628\u062a\u063a\u064a\u0631 \u0633\u0648\u0642 \u0627\u0644\u0648\u062c\u0647\u0629\u060c \u0623\u0648 \u0646\u0638\u0627\u0645 \u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0641\u0626\u0629 \u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645\u060c \u0641\u064a\u062c\u0628 \u0630\u0643\u0631 \u0647\u0630\u0627 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636 \u0641\u064a \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0648\u0627\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062a\u0623\u0643\u064a\u062f \u062e\u0637\u064a \u0642\u0628\u0644 \u0627\u0644\u0625\u0635\u062f\u0627\u0631.<\/p>\n<h2>120\/240 V circuit examples<\/h2>\n<p>\u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 \u062a\u0628\u062f\u0623 \u0628\u062d\u062f\u0648\u062f \u0627\u0644\u062a\u0637\u0628\u064a\u0642. \u062d\u062f\u062f \u0627\u0644\u0645\u0635\u062f\u0631\u060c \u0648\u0627\u0644\u062d\u0645\u0644\u060c \u0648\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a\u060c \u0648\u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0639\u0637\u0644\u060c \u0648\u0628\u064a\u0626\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a. \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0630\u064a \u064a\u0628\u062f\u0648 \u0645\u0646\u0627\u0633\u0628\u0627\u064b \u0645\u0646 \u062d\u064a\u062b \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0623\u0645\u0628\u064a\u0631 \u0642\u062f \u064a\u0641\u0634\u0644 \u0645\u0639 \u0630\u0644\u0643 \u0641\u064a \u0623\u062f\u0627\u0621 \u0627\u0644\u0642\u0648\u0633 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0626\u064a\u0629\u060c \u0623\u0648 \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0623\u0648 \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628. \u0627\u0633\u062a\u062e\u062f\u0645 \u0645\u0646\u062d\u0646\u0649 \u0627\u0644\u062a\u064a\u0627\u0631 \u0648\u0627\u0644\u0632\u0645\u0646 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0648\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a \u0627\u0644\u0623\u0633\u0644\u0643\u064a\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0643\u0644\u063a\u0629 \u0645\u0634\u062a\u0631\u0643\u0629 \u0628\u064a\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u060c \u0648\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u0633\u0644\u064a\u0645.<\/p>\n<p>\u062a\u0648\u062b\u064a\u0642 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u0627\u062a \u0648\u0627\u062e\u062a\u0628\u0627\u0631\u0647\u0627 \u0641\u064a \u0627\u0644\u0644\u0648\u062d\u0629. \u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u064a\u062c\u0628 \u0623\u0646 \u062a\u0630\u0643\u0631 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u062a\u064a\u0627\u0631 \u0642\u0635\u0631 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0628\u062f\u0626\u064a \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0642\u0648\u0629 \u062a\u062d\u0645\u0644 \u0627\u0644\u0645\u0648\u0635\u0644\u060c \u0648\u0648\u0642\u062a \u0627\u0644\u0641\u0635\u0644 \u0627\u0644\u0645\u0637\u0644\u0648\u0628. \u0625\u0646 \u0627\u0644\u0637\u0631\u0642 \u0627\u0644\u0645\u0633\u0645\u0627\u0629 \u0645\u062b\u0644 \u0627\u062e\u062a\u0628\u0627\u0631 \u0627\u0644\u062d\u0642\u0646 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u060c \u0623\u0648 \u0627\u062e\u062a\u0628\u0627\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u0623\u0648 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062a\u0646\u0633\u064a\u0642 \u062a\u0643\u0648\u0646 \u0623\u0643\u062b\u0631 \u0641\u0627\u0626\u062f\u0629 \u0645\u0646 \u0627\u0644\u0628\u064a\u0627\u0646 \u0627\u0644\u0639\u0627\u0645 \u0628\u0623\u0646 \u0627\u0644\u0645\u0646\u062a\u062c \u0630\u0648 \u201c\u062f\u0631\u062c\u0629 \u0635\u0646\u0627\u0639\u064a\u0629\u201d.\u201d<\/p>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u062a\u062a\u063a\u064a\u0631 \u0628\u062a\u063a\u064a\u0631 \u0633\u0648\u0642 \u0627\u0644\u0648\u062c\u0647\u0629\u060c \u0623\u0648 \u0646\u0638\u0627\u0645 \u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0641\u0626\u0629 \u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645\u060c \u0641\u064a\u062c\u0628 \u0630\u0643\u0631 \u0647\u0630\u0627 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636 \u0641\u064a \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0648\u0627\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062a\u0623\u0643\u064a\u062f \u062e\u0637\u064a \u0642\u0628\u0644 \u0627\u0644\u0625\u0635\u062f\u0627\u0631.<\/p>\n<h2>Selection and installation checks<\/h2>\n<p>\u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 \u062a\u0628\u062f\u0623 \u0628\u062d\u062f\u0648\u062f \u0627\u0644\u062a\u0637\u0628\u064a\u0642. \u062d\u062f\u062f \u0627\u0644\u0645\u0635\u062f\u0631\u060c \u0648\u0627\u0644\u062d\u0645\u0644\u060c \u0648\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a\u060c \u0648\u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0639\u0637\u0644\u060c \u0648\u0628\u064a\u0626\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a. \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0630\u064a \u064a\u0628\u062f\u0648 \u0645\u0646\u0627\u0633\u0628\u0627\u064b \u0645\u0646 \u062d\u064a\u062b \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0623\u0645\u0628\u064a\u0631 \u0642\u062f \u064a\u0641\u0634\u0644 \u0645\u0639 \u0630\u0644\u0643 \u0641\u064a \u0623\u062f\u0627\u0621 \u0627\u0644\u0642\u0648\u0633 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0626\u064a\u0629\u060c \u0623\u0648 \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0623\u0648 \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628. \u0627\u0633\u062a\u062e\u062f\u0645 \u0645\u0646\u062d\u0646\u0649 \u0627\u0644\u062a\u064a\u0627\u0631 \u0648\u0627\u0644\u0632\u0645\u0646 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0648\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a \u0627\u0644\u0623\u0633\u0644\u0643\u064a\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0643\u0644\u063a\u0629 \u0645\u0634\u062a\u0631\u0643\u0629 \u0628\u064a\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u060c \u0648\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u0633\u0644\u064a\u0645.<\/p>\n<p>\u062a\u0648\u062b\u064a\u0642 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u0627\u062a \u0648\u0627\u062e\u062a\u0628\u0627\u0631\u0647\u0627 \u0641\u064a \u0627\u0644\u0644\u0648\u062d\u0629. \u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u064a\u062c\u0628 \u0623\u0646 \u062a\u0630\u0643\u0631 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u062a\u064a\u0627\u0631 \u0642\u0635\u0631 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0628\u062f\u0626\u064a \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u060c \u0648\u0642\u0648\u0629 \u062a\u062d\u0645\u0644 \u0627\u0644\u0645\u0648\u0635\u0644\u060c \u0648\u0648\u0642\u062a \u0627\u0644\u0641\u0635\u0644 \u0627\u0644\u0645\u0637\u0644\u0648\u0628. \u0625\u0646 \u0627\u0644\u0637\u0631\u0642 \u0627\u0644\u0645\u0633\u0645\u0627\u0629 \u0645\u062b\u0644 \u0627\u062e\u062a\u0628\u0627\u0631 \u0627\u0644\u062d\u0642\u0646 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u060c \u0623\u0648 \u0627\u062e\u062a\u0628\u0627\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u0623\u0648 \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062a\u0646\u0633\u064a\u0642 \u062a\u0643\u0648\u0646 \u0623\u0643\u062b\u0631 \u0641\u0627\u0626\u062f\u0629 \u0645\u0646 \u0627\u0644\u0628\u064a\u0627\u0646 \u0627\u0644\u0639\u0627\u0645 \u0628\u0623\u0646 \u0627\u0644\u0645\u0646\u062a\u062c \u0630\u0648 \u201c\u062f\u0631\u062c\u0629 \u0635\u0646\u0627\u0639\u064a\u0629\u201d.\u201d<\/p>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u062a\u062a\u063a\u064a\u0631 \u0628\u062a\u063a\u064a\u0631 \u0633\u0648\u0642 \u0627\u0644\u0648\u062c\u0647\u0629\u060c \u0623\u0648 \u0646\u0638\u0627\u0645 \u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0623\u0648 \u0641\u0626\u0629 \u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645\u060c \u0641\u064a\u062c\u0628 \u0630\u0643\u0631 \u0647\u0630\u0627 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636 \u0641\u064a \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0648\u0627\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062a\u0623\u0643\u064a\u062f \u062e\u0637\u064a \u0642\u0628\u0644 \u0627\u0644\u0625\u0635\u062f\u0627\u0631.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/09\/single-pole-mcb-vs-double-pole-mcb-product-200k.webp\" alt=\"CHAC Single Pole Mcb Vs Double Pole Mcb product reference\" loading=\"lazy\"\/><\/p>\n<h2>\u0645\u0642\u0627\u0631\u0646\u0629 \u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062f\u0641\u0627\u0639 \u0639\u0646\u0647\u0627<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0628\u0639\u062f<\/th>\n<th>\u0627\u0644\u062e\u064a\u0627\u0631 \u0623<\/th>\n<th>\u0627\u0644\u062e\u064a\u0627\u0631 \u0628<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Conductors opened<\/td>\n<td>One live conductor<\/td>\n<td>Two conductors with linked operation<\/td>\n<\/tr>\n<tr>\n<td>Typical use<\/td>\n<td>120 V branch circuit<\/td>\n<td>240 V load or shared disconnect<\/td>\n<\/tr>\n<tr>\n<td>Key risk<\/td>\n<td>Wrong neutral or shared circuit arrangement<\/td>\n<td>Incorrect pole rating or terminal use<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0625\u062c\u0631\u0627\u0621\u0627\u062a \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0648\u0627\u0644\u0634\u0631\u0627\u0621<\/h2>\n<ol>\n<li>\u062a\u062b\u0628\u064a\u062a \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u0627\u062a \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629: \u062c\u0647\u062f \u0627\u0644\u0646\u0638\u0627\u0645\u060c \u0627\u0644\u0623\u0642\u0637\u0627\u0628\u060c \u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0645\u0644\u060c \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0645\u062f\u064a\u062f\u060c \u062a\u064a\u0627\u0631 \u0627\u0644\u0639\u0637\u0644\u060c \u0648\u062d\u062f\u0648\u062f \u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u062d\u064a\u0637\u0629.<\/li>\n<li>\u0637\u0644\u0628 \u0628\u064a\u0627\u0646\u0627\u062a \u062e\u0627\u0635\u0629 \u0628\u0627\u0644\u0637\u0631\u0627\u0632: \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u060c \u0645\u0646\u062d\u0646\u0649 \u0627\u0644\u0641\u0635\u0644\u060c \u0642\u062f\u0631\u0629 \u0627\u0644\u0642\u0637\u0639\u060c \u062d\u062f\u0648\u062f \u0627\u0644\u0623\u0637\u0631\u0627\u0641\u060c \u0627\u0644\u0623\u0628\u0639\u0627\u062f \u0648\u062f\u0644\u0629 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631.<\/li>\n<li>\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u062a\u0646\u0633\u064a\u0642 \u0645\u0639 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0641\u064a \u0623\u0639\u0644\u0649 \u0627\u0644\u0646\u0637\u0627\u0642 \u0648\u0623\u0633\u0641\u0644\u0647\u061b \u0644\u0627 \u062a\u0633\u062a\u0646\u062a\u062c \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0626\u064a\u0629 \u0645\u0646 \u0627\u0644\u0639\u0644\u0627\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0623\u0648 \u062d\u062c\u0645 \u0627\u0644\u0625\u0637\u0627\u0631.<\/li>\n<li>\u0627\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0639\u0644\u0649 \u0639\u064a\u0646\u0629 \u0623\u0648 \u0645\u0642\u0627\u0644 \u0623\u0648\u0644\u060c \u0648\u062a\u0633\u062c\u064a\u0644 \u0646\u0642\u0627\u0637 \u0639\u0632\u0645 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 \u0648\u0627\u0644\u0641\u062d\u0635\u060c \u0648\u062a\u062d\u062f\u064a\u062f \u0645\u0646 \u064a\u0642\u0648\u0645 \u0628\u0627\u062e\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u062a\u0634\u063a\u064a\u0644.<\/li>\n<li>\u0627\u0644\u062a\u062e\u0637\u064a\u0637 \u0644\u0642\u0637\u0639 \u0627\u0644\u063a\u064a\u0627\u0631 \u0648\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u063a\u064a\u064a\u0631 \u0628\u062d\u064a\u062b \u0644\u0627 \u064a\u0624\u062f\u064a \u0623\u064a \u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0644\u0627\u062d\u0642 \u0625\u0644\u0649 \u062a\u063a\u064a\u064a\u0631 \u0623\u062f\u0627\u0621 \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u062e\u0644\u0633\u0629\u064b.<\/li>\n<\/ol>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0645\u0634\u062a\u0631\u064a\u0646 \u0627\u0644\u0630\u064a\u0646 \u064a\u0642\u0627\u0631\u0646\u0648\u0646 \u0639\u0627\u0626\u0644\u0627\u062a \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0647\u064a\u0626\u0629\u060c \u062a\u0648\u0641\u0631 \u0634\u0631\u0643\u0629 \u062a\u0634\u0627\u0643 \u0625\u0644\u0643\u062a\u0631\u064a\u0643 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0639\u0627\u0645\u0629 \u062d\u0648\u0644 <a href=\"https:\/\/chac-electric.com\/ar\/%d9%82%d8%a7%d8%b7%d8%b9-%d8%a7%d9%84%d8%af%d8%a7%d8%a6%d8%b1%d8%a9-%d8%a7%d9%84%d9%85%d8%b5%d8%ba%d8%b1\/\"><strong>\u0645\u0646\u062a\u062c\u0627\u062a \u0628\u0646\u0643 \u0645\u0635\u0631 (or \u0645\u0646\u062a\u062c\u0627\u062a \u0625\u0645 \u0633\u064a \u0628\u064a depending on context, but usually \u0645\u0646\u062a\u062c\u0627\u062a \u0628\u0646\u0643 \u0645\u0635\u0631 for MCB in Egypt or \u0645\u0646\u062a\u062c\u0627\u062a \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0644\u0644\u062c\u0647\u062f \u0627\u0644\u0645\u0646\u062e\u0641\u0636 - Miniature Circuit Breakers).\n\nLet's provide the literal and most common technical translation for \"MCB products\" (Miniature Circuit Breaker products - \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u0635\u063a\u0631\u0629):\n\u0645\u0646\u062a\u062c\u0627\u062a \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0645\u0635\u063a\u0631\u0629<\/strong><\/a> \u0648 <a href=\"https:\/\/chac-electric.com\/ar\/%d9%85%d8%b9%d8%af%d8%a7%d8%aa-%d8%a7%d9%84%d8%aa%d9%88%d8%b2%d9%8a%d8%b9-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a6%d9%8a\/\"><strong>\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a<\/strong><\/a>. \u0627\u0639\u062a\u0628\u0631 \u0647\u0630\u0647 \u0627\u0644\u0635\u0641\u062d\u0627\u062a \u0646\u0642\u0637\u0629 \u0628\u062f\u0627\u064a\u0629 \u0648\u062a\u0623\u0643\u062f \u0645\u0646 \u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u0644\u0645\u0634\u0631\u0648\u0639\u0643.<\/p>\n<p><!-- second-round-optimization --><\/p>\n<h2>Choose poles from the circuit isolation requirement<\/h2>\n<p>A <a href=\"https:\/\/chac-electric.com\/ar\/%d9%82%d8%a7%d8%b7%d8%b9-%d8%a7%d9%84%d8%af%d8%a7%d8%a6%d8%b1%d8%a9-%d8%a7%d9%84%d9%85%d8%b5%d8%ba%d8%b1\/\"><strong>single-pole MCB<\/strong><\/a> interrupts one live conductor, while a <a href=\"https:\/\/chac-electric.com\/ar\/%d9%85%d8%b9%d8%af%d8%a7%d8%aa-%d8%a7%d9%84%d8%aa%d9%88%d8%b2%d9%8a%d8%b9-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a6%d9%8a\/\"><strong>double-pole MCB<\/strong><\/a> can disconnect two conductors together where the circuit and local rules require it. The practical decision is <strong>neutral switching<\/strong>: confirm whether the neutral must be switched, protected, or simply carried through the board before choosing the module width.<\/p>\n<p>Do not infer the correct pole count from voltage alone. Check the earthing arrangement, isolation procedure, panel layout and destination-market wiring rules, then document why the selected device is suitable.<\/p>\n<p>\u0642\u0631\u0627\u0621\u0629 \u0630\u0627\u062a \u0635\u0644\u0629: <a href=\"https:\/\/chac-electric.com\/ar\/?p=4247\">What is dpn MCB meaning<\/a> explains the 1P+N option in more detail.<\/p>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<h3>When do I need a double-pole MCB?<\/h3>\n<p>Use one when a load is supplied by two live conductors or when simultaneous disconnection is required by the system design. Confirm the wiring method and local code before choosing.<\/p>\n<h3>Can two single-pole MCBs replace a double-pole unit?<\/h3>\n<p>Only if the devices are listed and installed as a common-trip assembly where permitted. Two independent handles do not guarantee simultaneous opening.<\/p>\n<h3>Should the neutral be switched?<\/h3>\n<p>That depends on the earthing and supply arrangement and local rules. Never switch a protective conductor; follow the panel manufacturer\u2019s neutral and isolation instructions.<\/p>\n<h3>Does a double-pole breaker double the current rating?<\/h3>\n<p>No. The current rating applies to each pole and the circuit conductors. Voltage and power calculations must reflect the actual connection.<\/p>\n<h2>\u0645\u0631\u0627\u062c\u0639 \u0645\u0648\u062b\u0648\u0642\u0629<\/h2>\n<ul>\n<li>\u0627\u0644\u0627\u0633\u062a\u0639\u0627\u0646\u0629 \u0628\u0627\u0644\u0645\u0639\u064a\u0627\u0631 IEC 60898-1 (\u0645\u0639 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u062d\u0627\u0644\u064a \u0648\u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0627\u0644\u0648\u0637\u0646\u064a).<\/li>\n<li>IEC 60364-5-53 (consult the current edition and national adoption).<\/li>\n<li>NFPA 70 (\u0627\u0644\u0643\u0627\u0646\u0648\u0646 \u0627\u0644\u0648\u0637\u0646\u064a \u0644\u0644\u0643\u0647\u0631\u0628\u0627\u0621 NEC) (\u064a\u064f\u0631\u062c\u0649 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u062d\u0627\u0644\u064a \u0648\u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0627\u0644\u0648\u0637\u0646\u064a).<\/li>\n<\/ul>\n<p>\u0627\u0644\u0645\u0628\u062f\u0623 \u0627\u0644\u062f\u0627\u0626\u0645 \u0628\u0633\u064a\u0637: \u0642\u0645 \u0628\u062a\u062d\u062f\u064a\u062f \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0648\u0627\u0644\u062f\u0644\u064a\u0644 \u0645\u0639\u0627\u064b\u060c \u062b\u0645 \u0627\u062e\u062a\u0628\u0631 \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0627\u0644\u0645\u062c\u0645\u0639\u0629. \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0646\u0645\u0648\u0630\u062c\u060c \u0623\u0648 \u0633\u0624\u0627\u0644 \u062a\u0637\u0628\u064a\u0642\u060c \u0623\u0648 \u0627\u0642\u062a\u0628\u0627\u0633 \u0645\u0648\u062b\u0642\u060c, <a href=\"https:\/\/chac-electric.com\/ar\/%d8%a7%d8%aa%d8%b5%d9%84-%d8%a8%d9%86%d8%a7\/\">\u0627\u062a\u0635\u0644 \u0628\u0640 CHAC Electric<\/a> \u0648\u0634\u0627\u0631\u0643 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0648\u0627\u062c\u0628 \u0648\u0627\u0644\u062c\u0647\u062f \u0648\u0633\u0648\u0642 \u0627\u0644\u0648\u062c\u0647\u0629.<\/p>","protected":false},"excerpt":{"rendered":"<p>This guide explains single-pole and double-pole MCBs with practical selection, wiring, coordination and compliance checks for global electrical buyers.<\/p>","protected":false},"author":1,"featured_media":4230,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4232","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"_links":{"self":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts\/4232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/comments?post=4232"}],"version-history":[{"count":2,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts\/4232\/revisions"}],"predecessor-version":[{"id":4300,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts\/4232\/revisions\/4300"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/media\/4230"}],"wp:attachment":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/media?parent=4232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/categories?post=4232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/tags?post=4232"}],"curies":[{"name":"\u0644\u0639\u0628 \u062c\u064a\u062f\u0629","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}