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C22.1-06 Preface This twentieth edition of the Canadian Electrical Code, Part I, was approved by the Committee on the Canadian Electrical Code, Part I, and by the Regulatory Authority Committee at their June 2005 meetings in Kelowna, British Columbi

定价: 865元 / 折扣价: 736

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定价: 7872元 / 折扣价: 6692

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1. Scope and Object This standard applies, when required by the relevant product standard, to switchgear and controlgear hereinafter referred to as "equipment" and intended to be connected to circuits, the rated voltage of which does not exceed 1000 V

定价: 2321元 / 折扣价: 1973

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1. Scope This part of International Standard IEC 71 applies to three- phase a.c. systems having a highest voltage for equipment above 1 kV. It specifies the procedures for the selection of the standard withstand voltages for the phase-to-earth, phase-t

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1. Scope This International Standard applies to residual current operated circuit-breakers functionally independent of, or functionally dependent on, line voltage, for household and similar uses, not incorporating overcurrent protection (hereafter refe

定价: 2139元 / 折扣价: 1819

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