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Journeyman electrician exam prep where every explanation cites the code section. Drill the lookups, work the calcs, sit the timed exam. All offline.

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Lookup drill, question 3 of 100:00

A 120/240 V service drop crosses a house driveway. What's the minimum clearance above the driveway?

A18 ft B15 ft C12 ft D10 ft

230.24(B)(2)

Find it: index under Clearances, overhead service conductors.

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0:41

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The full working is shown on every problem. Answers come from tested code, never typed by hand.

Given3-phase, 127 A, 300 ft run

FormulaVD = 1.732 × K × I × L ÷ CM

Plug in1.732 × 12.9 × 127 × 300 ÷ 83,690

VoltsVD ≈ 10.2 V

Percent10.2 ÷ 480 ≈ 2.1%

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