FREE TN LLE Special Occupancies and Equipment Questions and Answers

Question 1

An electrician is installing a 120V incandescent luminaire (lighting fixture) located 8 feet horizontally from the inside wall of a permanently installed swimming pool. According to NEC Article 680, which of the following is required for this installation?

Accepted Answer

The circuit supplying the luminaire must be protected by a Ground-Fault Circuit-Interrupter (GFCI).

Answer

According to NEC 680.22(B)(4), luminaires installed in the area extending between 5 ft and 10 ft horizontally from the inside walls of a pool must be protected by a GFCI unless they are installed at least 5 ft above the maximum water level and rigidly attached to the structure. Since the height is not specified, GFCI protection is the mandatory requirement.

Question 2

In a commercial garage used for major vehicle repair, which area is generally classified as a Class I, Division 2 hazardous location?

Accepted Answer

The area from the floor up to a level of 18 inches above the floor.

Answer

NEC Article 511.3(B)(1) states that for a floor at or above grade in a major repair garage, the entire area up to a level of 18 inches above the floor is considered a Class I, Division 2 location. This is due to the potential presence of flammable fuel vapors, which are typically heavier than air and accumulate near the floor.

Question 3

Which of the following wiring methods is required for branch circuits serving patient care spaces in a health care facility?

Accepted Answer

A metal raceway or a cable with a metallic sheath.

Answer

NEC 517.13(A) requires that all branch circuits serving patient care spaces be installed in a metal raceway or a cable with a metallic armor or sheath (e.g., Type AC or MC cable). This provides an effective ground-fault current path and enhanced physical protection, which is critical for patient safety.

Question 4

An electrician is wiring a livestock confinement area in an agricultural building, which is subject to a corrosive atmosphere from animal waste. According to NEC Article 547, which of the following wiring methods is generally permitted?

Accepted Answer

Type NMC (nonmetallic-sheathed cable).

Answer

NEC 547.5 specifies permitted wiring methods for agricultural buildings, especially in areas with dust, moisture, and corrosive atmospheres. Type NMC cable, which has a corrosion-resistant outer jacket, is listed as a suitable method. Standard Type NM-B, EMT, and FMC are generally not suitable for such corrosive environments without additional protection.

Question 5

When installing a 125V, 20-amp shore power receptacle on a fixed pier at a marina, what is the minimum mounting height above the deck surface according to NEC Article 555?

Accepted Answer

12 inches

Answer

While specific local amendments can vary, the NEC and related standards generally establish a minimum height to protect receptacles from water. For example, some jurisdictions explicitly adopt NEC 555.33 and specify that receptacles must be mounted not less than 12 inches above the deck surface of the pier. This helps prevent submersion from splashing or high water levels.

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE - Tennessee Limited Licensed Electrician Practice Test

FREE TN LLE Special Occupancies and Equipment Questions and Answers