Electrical · NEC 225, 230, 300.5

Services, outdoor & underground

Drop clearances, meter and disconnect rules, burial depth, emergence from grade. 6 drills, each with the answer, the fix and the 2023 NEC section.

Start drilling All electrical categories

The drills

Side-wall service drop at the patio
Level 1 · Apprentice
Rear of a 1960s rambler, patio side
Open trench to the lamp post
Level 1 · Apprentice
Front-yard lamp post, trench open for rough-in inspection
Feed into the detached garage
Level 2 · Journeyman
Detached garage, side wall by the service door
Service-entrance cable down the siding
Level 2 · Journeyman
Service change on a 1950s story-and-a-half, ready for inspection
New-build meter at final
Level 3 · Master
New single-family home, 2025 permit, ready for final
Drop near the bedroom window
Level 3 · Master
Two-story gable end, January

Other electrical categories