Lập kế hoạch & Dự toánCâu 363 / 521
Using the optional method, a dwelling's other loads (excluding heating/AC) total 30 kVA. What is the demand after applying the optional-method demand factors?
a.30 kVA
b.22 kVA
c.12 kVA
d.18 kVA
Giải thích
The first 10 kVA is at 100% and the remainder at 40%: 10 + (20 × 0.40) = 10 + 8 = 18 kVA. Applying 40% to the whole 30 kVA or skipping the first block gives the wrong answers.
Trích dẫn luật: 2023 NEC §220.82(B)Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Using Table 220.55, Column C, what is the demand load for a single 12 kW household electric range?
- A household electric clothes dryer is rated 4.5 kW. What value is used in the service load calculation?
- A dwelling calculated load totals 24,000 VA on a 240 V, single-phase service. What is the minimum service ampacity this load demands?
- On an electrical floor plan, the switch symbol marked with a subscript 3 (S3) indicates what device?
- How often is a new edition of the National Electrical Code, on which the California Electrical Code is based, normally published?
- A floor plan is drawn at a scale of 1/4 in = 1 ft. A wall measures 3 in on the drawing. What is its actual length?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-10 Electrical Trade Examination · Quy trình kiểm tra