C&G 2391-52
City & Guilds 2391-52 Combined Inspection & Testing of Electrical Installations
Rcd TestingEnglish
Exam overviewPractice session
Per the RCD product standards (BS EN 61008/61009), a general-purpose RCD must operate within 300 ms at 1x IΔn and within how long at 5x IΔn?
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