On a restaurant build-out at final inspection, a contractor wants to rely on a series-rated combination; what must be verified?
- AThe downstream device has the lower price
- BThe devices share the same enclosure color
- An approved marked device combination
- DBoth devices are from any manufacturer
Why C is correct
Series performance is established for tested combinations, not inferred from individual ratings or appearance. The best answer is therefore “The specific upstream and downstream devices are part of an approved marked combination.” The other choices either address a different system, rely on an unsafe shortcut, or make a conclusion not supported by the stated facts.