DEFINITIONS
A conductor intentionally grounded may still carry current during normal operation, but this term does NOT include equipment grounding conductors.
What is the Grounded Conductor? (Art. 100)
You are asked for conductor ampacity. The correct table is NOT in Chapter 2, but here.
What is Table 310.16?
A 20A continuous load is supplied. The minimum conductor ampacity required is this value.
What is 25A? (125% rule / 210.19(A)(1))
All of the following require GFCI protection in temporary wiring EXCEPT:
What is 590.6
A branch circuit supplies a continuous load. First apply this rule, then verify ampacity in this table.
What is 125% and Table 310.16? (210.19(A)(1))
This term refers to the physical connection to earth, but does NOT necessarily imply bonding of equipment.
What is Grounding? (Art. 100)
Conduit fill is required, but the actual limits are NOT found in an article—rather here.
What is Chapter 9, Table 1?
A 240V circuit supplies a 4800W load. The calculated current is this value.
What is 20A? (Ohm’s Law / 220)
All of the following are considered continuous loads EXCEPT:
What is a noncontinuous load? (Art. 100)
To size a service, the student must calculate load using this article, then apply requirements from this article.
What is 220 then 230?
This device is intended to open automatically on overcurrent, but may not provide protection against all fault types.
What is an Overcurrent Protective Device? (Art. 100)
Adjustment factors apply when more than three current-carrying conductors are installed. The student must NOT use Table 310.16 but instead this section.
What is 310.15(C)(1)?
A feeder serves 60A noncontinuous and 40A continuous load. Minimum ampacity required is this value.
What is 110A? (60 + 50) (215.2(A)(1))
All of the following are grounding electrodes EXCEPT:
What is equipment grounding conductor? (250.52)
To properly size grounding electrode conductors, the electrician must reference service conductor size, then use this section.
What is 250.66?
This authority interprets the Code but is not defined by federal law within the NEC.
What is the Authority Having Jurisdiction? (Art. 100)
Grounding electrode conductor sizing is often mistaken for ampacity tables, but is actually found here.
What is 250.66?
Three current-carrying conductors require no derating, but adding one more changes ampacity based on this concept.
What is Adjustment Factors? (310.15(C)(1))
All of the following are service equipment requirements EXCEPT:
What is feeder requirement? (230 vs 215 trap)
A motor circuit requires using FLC tables, not nameplate, followed by this sizing rule.
What is 430.22?
This system includes electrodes that are bonded together, but not all electrodes are always required to be present.
What is the Grounding Electrode System? (250.50)
Demand factors for lighting loads are NOT in definitions or branch circuits, but here.
What is 220.42?
A motor with FLC of 32A must have conductors sized at this minimum ampacity.
What is 40A? (125% / 430.22)
All of the following require bonding EXCEPT:
What is isolated nonconductive material? (250 logic trap)
A full installation requires identifying system grounding, bonding, and electrode requirements across these articles.
What is Article 250?