Thiết bị & Hệ thốngCâu 322 / 521
Which loads are typically served by a legally required standby system?
a.Personal comfort loads in a residence
b.Life-safety egress lighting only
c.Data-center revenue equipment chosen by the owner
d.Ventilation, smoke removal, and communication systems required by code for safety
Giải thích
Legally required standby systems (Article 701) supply loads such as heating and ventilation, smoke removal, sewage disposal, and communication systems whose failure could create hazards or hamper firefighting and rescue. Pure life-safety egress loads fall under emergency systems (700), and owner-selected convenience loads fall under optional standby (702).
Trích dẫn luật: 2023 NEC §701.2Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- On a portable generator, GFCI protection for personnel is generally required on which receptacles?
- A generator disconnecting means must be capable of doing what?
- How must emergency illumination be arranged with respect to the failure of a single lighting element?
- Transfer equipment for an optional standby system must do what regarding the normal and standby sources?
- What does the NEC require regarding testing of emergency systems?
- What capacity must an emergency system power source have?
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