10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The LA-EWC exam has 100 questions and runs 4 hours.
These 10 free LA-EWC questions are organized by exam domain, so you can see how each part of the Louisiana Electrical Work Contractor Exam blueprint is tested. Reveal the answer and explanation under each question.
An inspector cites an NEC informational note recommending a 3% branch-circuit voltage drop as the sole basis for rejecting an installation measured at 3.4%. Which interpretation is correct?
Correct answer: C - The note is explanatory and is not enforceable by itself
A clamp ammeter is closed around both the ungrounded and grounded conductor supplying a normally operating 120 V load. The display is nearly zero even though the load is operating. What explains the reading?
Correct answer: B - The equal outbound and return currents create opposing magnetic fields that cancel
An industrial load continues to deliver 20 kW after capacitors raise its lagging power factor from 0.70 to 0.95 at the same line voltage. Which electrical change should be expected?
Correct answer: A - Line current and apparent power decrease while useful real power remains 20 kW
A 480Y/277 V panelboard that may require energized servicing faces a concrete wall. Exposed live parts are on the panelboard side only. What minimum working-space depth is required?
Correct answer: C - 3.5 ft
A 2,400 ft² dwelling has the minimum two small-appliance circuits and one laundry circuit. Using 3 VA/ft², 1,500 VA for each required small-appliance and laundry circuit, and a demand of 100% of the first 3,000 VA plus 35% of the remainder, what demanded general load enters the service calculation?
Correct answer: C - 6,045 VA
A 240 V receptacle on a 120/240 V single-phase system supplies a range in a dwelling-unit kitchen. It is 9 ft from the sink. Under the 2023 NEC kitchen rule, how should the receptacle be protected?
Correct answer: D - Provide GFCI protection because the receptacle is in a dwelling-unit kitchen
A feeder conductor has an allowable ampacity of 58 A and supplies a panelboard with a calculated load of 52 A. The conductor ampacity does not match a standard overcurrent rating, 60 A is the next higher standard rating, the rating is below 800 A, and no other rule requires a smaller device. Which overcurrent device is permitted?
Correct answer: C - A 60 A device under the next-higher-standard-rating rule
Available fault current at the line terminals of a feeder breaker is 22 kA. The breaker has a 10 kA interrupting rating, the downstream panelboard is marked 25 kA SCCR, and no approved series rating applies. Which conclusion is correct?
Correct answer: D - The breaker is inadequate because its interrupting rating is below the available fault current
A detached workshop is supplied by a four-wire feeder and has a grounding-electrode system. The installer bonds the feeder neutral bar to the subpanel enclosure. What correction is required?
Correct answer: C - Remove the downstream bond, isolate the neutral, and keep the feeder equipment grounding conductor
A single 8 ft rod electrode has a measured resistance to earth of 32 ohms. What is the direct NEC compliance response?
Correct answer: A - Install one supplemental permitted electrode at least 6 ft from the first
The LA-EWC exam also covers these domains. Drill them in the full free practice test:
The full bank has 1,020 more LA-EWC questions with explanations.
Continue in the free practice test →
View plans