Ring main with 30 A breaker, cable rated 20 A. Is this safe? Explain.
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Hint
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In a ring main, the total current is shared between the two paths, so each section carries less than the total. The 20 A cable is sufficient if the 30 A breaker is the correct type.…
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Full Explanation
In a ring main, the total current is shared between the two paths, so each section carries less than the total. The 20 A cable is sufficient if the 30 A breaker is the correct type.