CEI Safety & Compliance Regulations 4

Question 1

A photovoltaic system inspection reveals that the DC combiner box is not labeled with the required maximum voltage. Which NEC article requires voltage labeling on PV system equipment?

Accepted Answer

Article 690

Answer

NEC Article 690 (Solar Photovoltaic Systems) requires that PV systems be marked with maximum system voltage, maximum circuit current, and other safety information at key locations.

Question 2

Which OSHA standard requires employers to provide Personal Protective Equipment (PPE) at no cost to employees working on or near exposed energized electrical parts?

Accepted Answer

29 CFR 1910.335(a)(1)(i)

Answer

OSHA 29 CFR 1910.335(a)(1)(i) requires that employees working in areas where there are potential electrical hazards be provided with electrical protective equipment appropriate for the specific parts of the body exposed.

Question 3

During inspection of a motor control center (MCC), the inspector finds that the equipment grounding conductors are aluminum. The conductors are in contact with masonry surfaces inside the enclosure. What NEC concern applies?

Accepted Answer

NEC 250.120(C) prohibits aluminum EGC contact with masonry or earth without protection against corrosion

Answer

NEC 250.120(C) requires that aluminum or copper-clad aluminum equipment grounding conductors not be used in direct contact with masonry or earth or where subject to corrosive conditions.

Question 4

Under the Americans with Disabilities Act (ADA), electrical receptacle outlets and controls must be mounted within which height range to be accessible to individuals in wheelchairs?

Accepted Answer

15 to 48 inches above the finished floor for forward reach, or 9 to 54 inches for side reach

Answer

ADA Standards for Accessible Design require operable parts to be within reach ranges: 15–48 inches for forward reach and 9–54 inches for side reach above finished floor.

Question 5

A CEI inspector notes that surge protective devices (SPDs) are not installed on the service entrance panel of a newly constructed dwelling unit. As of the 2020 NEC, is this a violation?

Accepted Answer

Yes — NEC 230.67 requires SPDs on all services supplying dwelling units starting with the 2020 NEC

Answer

The 2020 NEC added Section 230.67 requiring surge protective devices (Type 1 or Type 2) to be installed at the service entrance of all newly constructed dwelling units.

(CEI) Certified Electrical Inspector Practice Test

(CEI) Certified Electrical Inspector Practice Test

CEI Safety & Compliance Regulations 4