In this video, we show you how to use an earth leakage tester to quickly and effectively confirm if an RCD consumer unit (CCU) will function correctly when upgrading or changing a fusebox. This method can save time compared to a full insulation resistance (IR) test, especially in situations where a quick go/no-go result is needed before committing to a board change. You'll learn: How to set up and use an earth leakage tester What readings to look for When this method is appropriate Key considera

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