Electrical Safety, Code Administration, and Plan Review
Safety and administration
Electrical safety begins with recognizing shock and arc-flash hazards, establishing approach boundaries, and using PPE and insulated tools. Electrical safe-work concepts include qualified persons, energized-work permits, lockout/tagout, and incident-energy analysis. Code administration covers adoption of the code, local amendments, permits, inspections, and the authority having jurisdiction.
Plan review
A plan reviewer checks load calculations, service and feeder sizing, overcurrent coordination, grounding and bonding, working clearances, and labeling. One-line diagrams, panel schedules, available fault current, and equipment ratings must be consistent. Reviewers also verify that special occupancies and equipment have the required listings and protection.
Traps
Questions often confuse the shock approach boundary with the arc-flash boundary, or assume energized work is allowed without a permit. Do not treat a plan review as a substitute for field inspection, and do not accept a panel schedule that omits the calculated load or available fault current. Local amendments can be stricter than the model code.
Worked example
During plan review, a 400 A service with a calculated load of 320 A and a 400 A panel is acceptable only if the service conductors, grounding electrode conductor, and equipment interrupting rating all match the available fault current and the calculated load. Rule of thumb: compare calculated load, conductor ampacity, and protective device rating as a three-part check.