NEC Electrical Engineering study plan
NEC Electrical Engineering · Give each week a clear focus.
8 weeks · About 7 hours per week
Branch Circuits, Feeders, and Service Calculations & General Electrical Requirements and Code Administration
Compute a single-family dwelling service load using the standard method, showing each demand factor applied
Compute the same dwelling load using the optional method and reconcile the two results
Identify which Article 220 calculation method applies to a given occupancy description
Tabulate the general requirements in Article 100 definitions that drive calculation decisions (ampacity, demand factor, continuous load)
Your checkpoint
A one-page load calculation worksheet for a sample dwelling with both standard and optional method results, checked to within 1% of a reference solution
Branch Circuits, Feeders, and Service Calculations & Overcurrent Protection and Short-Circuit Coordination
Size feeder conductors and overcurrent devices for a multi-unit dwelling and a small commercial occupancy
Apply continuous-load and noncontinuous-load rules to size a feeder and its OCPD
Select the correct conductor ampacity adjustment and correction factors for a given ambient temperature and conduit fill
Determine the next-standard-size OCPD permitted for a given calculated load
Your checkpoint
A feeder sizing packet with three worked examples (dwelling, commercial, mixed continuous/noncontinuous) documenting every table reference used
Wiring Methods and Materials & Grounding, Bonding, and Equipment Protection
Match wiring methods to occupancy and location restrictions, listing at least five prohibited uses per method
Determine conductor fill and box fill for a given raceway and box arrangement
Size equipment grounding conductors and grounding electrode conductors for service and feeder scenarios
Explain the difference between grounding and bonding and identify where each is required
Select the correct support and securing intervals for four common wiring methods
Your checkpoint
A wiring-method comparison matrix covering six methods against support, fill, permitted-use, and EGC rules, plus two solved box-fill problems
Grounding, Bonding, and Equipment Protection & Overcurrent Protection and Short-Circuit Coordination
Apply the rules for bonding metal piping systems, structural steel, and separately derived systems
Determine when ground-fault protection of equipment is required and how to coordinate it
Compute available fault current implications for OCPD selection in a simple one-line diagram
Identify the requirements for equipment grounding conductor continuity and identification
Your checkpoint
A grounding and bonding one-line diagram for a service with separately derived system, annotated with the specific rule that requires each bond and grounding electrode connection
Motors, HVAC, and Industrial Equipment & Electrical Safety, Inspection, and Code Compliance
Size branch-circuit conductors, overload protection, and short-circuit protection for a motor using nameplate and table data
Determine disconnect sizing and location requirements for a motor circuit
Identify the inspection points in a rough-in for a motor installation and list what an inspector would verify
Distinguish overload protection from short-circuit and ground-fault protection in motor circuits
Apply the rules for HVAC equipment nameplate-based sizing and disconnecting means
Your checkpoint
A complete motor circuit design sheet (branch conductors, overload, short-circuit protection, disconnect) plus a 10-item rough-in inspection checklist
Special Occupancies and Special Equipment & Special Conditions, Emergency Systems, and Classified Locations
Identify the classification criteria for hazardous (classified) locations and match wiring methods to each division/zone
Determine the requirements for emergency systems, legally required standby, and optional standby systems
Apply the rules for special occupancies such as health care facilities, places of assembly, and mobile homes
Select the correct wiring method for a given classified location scenario
Explain the difference between emergency, legally required standby, and optional standby and the code requirements that follow
Your checkpoint
A classified-location decision table mapping four location descriptions to permitted wiring methods and required equipment markings, plus a one-page emergency-system comparison
Electrical Safety, Inspection, and Code Compliance & General Electrical Requirements and Code Administration
Walk through an inspection sequence for a residential service and list the code articles that govern each checkpoint
Identify common code violations in a set of described field conditions
Apply the general requirements for working clearances, dedicated equipment space, and illumination
Explain the permit, inspection, and approval process and the role of the authority having jurisdiction
Determine when a variance or special permission is required and how to document it
Your checkpoint
A mock inspection report on a described residential service identifying at least eight violations with the governing rule cited for each
Branch Circuits, Feeders, and Service Calculations & Grounding, Bonding, and Equipment Protection & Overcurrent Protection and Short-Circuit Coordination & Motors, HVAC, and Industrial Equipment & Special Occupancies and Special Equipment & Special Conditions, Emergency Systems, and Classified Locations & Electrical Safety, Inspection, and Code Compliance
Complete a timed 60-question mixed-domain practice set and score at least 80%
Review every missed question and write the governing rule reference for each
Re-solve one calculation-heavy problem from each of domains 3, 5, and 6 without notes
Build a personal quick-reference sheet of the 20 rules you missed most often during the plan
Your checkpoint
A scored practice exam with an error log listing the rule reference for every missed item, plus a finalized one-page quick-reference sheet