Branch Circuits & WiringQuestion 227 of 521
The NEC informational note recommends that voltage drop on a branch circuit not exceed what percentage of the circuit voltage?
a.5%
b.2%
c.3%
d.10%
Explanation
The informational note to 210.19(A) recommends a maximum 3% voltage drop on a branch circuit for reasonable efficiency. 5% is the combined feeder-plus-branch recommendation, and 2% or 10% are not the branch-circuit figure.
Law Reference: 2023 NEC §210.19(A), Informational NotePractice all 521 questions free — no signup required.
Related questions on this topic
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- For the combined feeder plus branch circuit, the NEC informational note recommends total voltage drop not exceed what percentage?
- A 120 V single-phase circuit uses 12 AWG copper (6,530 cmil) carrying 20 A over a one-way length of 100 ft. Using VD = 2 × K × I × L ÷ cmil with K = 12.9, what is the approximate voltage drop?
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