Chapter 1 — General
What does the NEC define as a qualified person?
A person with skills and knowledge related to the construction and operation of electrical equipment and installations, and who has received safety training to recognize and avoid the hazards involved.
What is the minimum number of 20-amp small-appliance branch circuits required for a dwelling kitchen and the other designated areas?
Two.
210.11(C)(1)
What is the general minimum burial cover for rigid metal conduit containing branch circuits rated 120 V or less, under the applicable direct-burial conditions?
6 inches, subject to the conditions and exceptions in the table. Table 300.5
What NEC article covers motors, motor circuits, and controllers?
Article 430.
What NEC article covers hazardous (classified) locations?
Articles 500–516, depending on the type of hazard and occupancy.
What is the minimum working-space depth in front of electrical equipment rated 0–150 V to ground under Condition 1?
3 feet. 110.26(A)(1), Table 110.26(A)(1)
What is the maximum standard overcurrent-device rating for a 12 AWG copper conductor under the general small-conductor rule, assuming no applicable exception?
20 amperes.
240.4(D)(5)
What NEC article covers electrical metallic tubing (EMT)?
Article 358.
What NEC article covers transformers and transformer vaults?
Article 450.
What is the difference between a Class I and a Class II hazardous location?
Class I involves flammable gases or vapors; Class II involves combustible dust.
What is the minimum working-space width in front of electrical equipment?
30 inches or the width of the equipment, whichever is greater. 110.26(A)(2)
What is the minimum number of 20-amp laundry branch circuits required for a dwelling unit?
One.
210.11(C)(2)
What NEC article covers nonmetallic-sheathed cable, Type NM and NMC?
Article 334.
What is the general maximum height above the floor for receptacles installed in dwelling-unit bathrooms, measured to the top of the receptacle outlet box?
No general maximum height is specified by that rule; the specific requirements depend on the applicable installation.
Article 406; do not confuse this with accessibility standards
What NEC article covers gasoline dispensing and service stations?
Article 514.
What is the minimum working-space width in front of electrical equipment?
30 inches or the width of the equipment, whichever is greater. 110.26(A)(2)
What is the minimum copper equipment grounding conductor size for a circuit protected by a 60-amp overcurrent device?
10 AWG copper.
Table 250.122
What is the maximum number of 90-degree bends permitted between pull points in a raceway?
Four quarter bends, or 360 degrees total. 358.26 for EMT; see the applicable raceway article
What NEC article covers luminaires, lampholders, and lamps?
Article 410.
What NEC article covers electrical installations in health care facilities?
Article 517.
What is the minimum headroom for electrical working space generally required by the NEC?
6½ feet, or the height of the equipment, whichever is greater.
110.26(A)(3)
What NEC section contains the general requirements for GFCI protection in dwelling-unit bathrooms?
210.8(A)(1).
210.8(A)(1)
Which NEC table is commonly used to determine conductor ampacity for insulated conductors rated 0–2000 volts under its stated conditions?
Table 310.15(B)(16).
What NEC article covers panelboards?
Article 408.
What NEC article covers recreational vehicles and recreational vehicle parks?
Article 551.