Core TradesCâu 132 / 700
What is the primary function of the equipment grounding conductor in a branch circuit?
a.To carry the normal load current back to the source
b.To improve the circuit's power factor
c.To reduce voltage drop to the load
d.To provide a low-impedance fault path so the overcurrent device trips quickly
Giải thích
The equipment grounding conductor bonds metal parts and provides a low-impedance path for fault current, allowing the breaker or fuse to open quickly and clear a fault. It does not carry normal load current (that is the neutral), and it does not affect power factor or voltage drop under normal operation.
Trích dẫn luật: 2025 CA Electrical Code, Art. 250Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Standard-cured concrete test cylinders are most commonly broken to verify that the specified compressive strength (f'c) has been reached at what age?
- A patio slab is 16 ft by 20 ft and 6 inches thick. Including a 10% allowance for waste and spillage, how much concrete should be ordered?
- A GFCI (ground-fault circuit interrupter) protects people primarily by:
- AFCI (arc-fault circuit interrupter) protection is generally required for branch circuits supplying which of the following in a dwelling?
- Under typical residential conditions, a copper 12 AWG conductor is generally protected at a MAXIMUM standard overcurrent rating of:
- For a 120/240-volt panelboard with no exposed live parts on the opposite side (Condition 1), what is the MINIMUM required clear working depth in front of the equipment?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB General Building (B) Trade Examination · Quy trình kiểm tra