HOLT Electricians Practice Exam

What ampere branch circuit is required to supply at least one outside sign outlet for commercial buildings?

1. 10 ampere

2. 15 ampere

3. 20 ampere

4. 25 ampere

The correct answer is: 20 ampere

In commercial buildings, outside sign outlets must comply with specific electrical codes to ensure adequate power supply and safety. A 20 ampere circuit is the minimum required to supply at least one outside sign outlet effectively. This rating ensures that the circuit can sufficiently handle the electrical load of the signage while providing some margin for additional lighting or features that may be incorporated. Using a 20 ampere circuit allows for versatility, enabling the operation of various types of signage, which may include neon lights or LEDs that can draw significant current. When properly protected with appropriate circuit breakers and wiring, this circuit rating helps maintain operational efficiency and reduces the risk of overheating or tripping due to overcurrent conditions. Lower amperage options, such as 10 or 15 amperes, would likely be inadequate, as they may not support the electrical demands of typical commercial signage, especially during peak usage. A 25 ampere circuit exceeds the minimum requirement, and while it could be beneficial for heavier loads, it is not necessary to meet the basic requirement for signage. Hence, a 20 ampere branch circuit is indeed the appropriate choice for this scenario.