General Code Requirements — NASCLA Electrical Practice Questions

17 questions · 17% of the NASCLA Electrical exam

Worked questions

1. On a office renovation during plan review, listed equipment instructions prohibit the mounting orientation shown on the drawings; what should control installation?

AInstaller preference
BThe lowest-cost orientation
Follow the listing or redesign
DThe drawing regardless of listing

Why C is correct

Listed equipment must be installed in accordance with instructions included in its listing; conflicts require resolution, not improvisation. The best answer is therefore “The listing and manufacturer instructions unless an approved redesign is obtained.” The other choices either address a different system, rely on an unsafe shortcut, or make a conclusion not supported by the stated facts.

2. On a community-center project during plan review, multiple nominal voltage systems are present in a building; what is needed at equipment?

ANo marking after energization
BConductor color alone in every case
CA handwritten note kept off site
Required voltage identification

Why D is correct

Durable field identification helps workers recognize system hazards and is not replaced by undocumented assumptions. The best answer is therefore “Clear identification of the system and nominal voltage where required.” The other choices either address a different system, rely on an unsafe shortcut, or make a conclusion not supported by the stated facts.

3. On a tenant improvement during rough-in, service equipment likely to require energized examination lacks hazard warning; what should be provided?

AA panel directory only
BA larger neutral
The arc-flash warning
DA residential smoke alarm

Why C is correct

Workers need warning of potential arc-flash hazard before examination, adjustment, servicing, or maintenance while energized. The best answer is therefore “The applicable arc-flash hazard warning marking.” The other choices either address a different system, rely on an unsafe shortcut, or make a conclusion not supported by the stated facts.

4. An aluminum conductor is proposed on a terminal identified only for copper. What must change?

AUse extra torque beyond instructions
Use an identified compatible combination
CFile the conductor smaller
DAdd tape around the lug

Why B is correct

Terminations are evaluated for conductor material, size, temperature, and preparation. Field alteration, tape, or excessive torque cannot create the required listing and can cause overheating.

13 more in the bank

Answers and explanations for these are in the app.

The one-line diagram shows available fault current and the installed breaker's interrupting rating. What is required?
In the elevation shown, chilled-water piping crosses the dedicated space above switchgear. What should the contractor do?
On a single-family remodel during rough-in, a panel enclosure has open knockouts after circuits are removed; what is the proper closeout?
On a restaurant build-out during rough-in, equipment terminals are marked 75°C; may conductor ampacity be selected solely from the 90°C column?
On a small hospital renovation during rough-in, a field-applied hazard label is handwritten in pencil and already fading; what quality is required?
Stored material occupies required electrical working space. What is required?
Switchgear shows water intrusion and tracking marks. May normal energization proceed after drying the exterior?
A specification requires documented termination torque. What is the proper method?
Custom-modified listed equipment no longer matches its listing. What should occur?
Live parts are exposed to unqualified occupants. What is required?
An industrial control panel SCCR is below available fault current. What is required?
Several disconnects serve different tenant equipment. What is required?
A required equipment access door is blocked by permanent piping. What should occur?

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