Alabama Electrical Journeyman Exam

For conductors 4 AWG or larger, a straight pull requires box length not less than 8 times the trade size of the largest raceway, while an angle or U pull requires the distance from each raceway entry to the opposite wall to be not less than 6 times the trade size of the largest raceway in a row (increased by the sum of the diameters of the other raceway entries in that row).

Per Table 300.5(A), direct burial cables require a minimum cover of 600 mm (24 in.) in all locations not specified, while RMC or IMC requires only 150 mm (6 in.) in those same unspecified locations.

The 150 mm (6 in.) RMC cover applies only to locations not specified in Table 300.5, whereas a dwelling driveway is a specified location requiring 450 mm (18 in.) of cover (general streets, roads, alleys and parking lots require 600 mm/24 in. for all wiring methods).

Each 14 AWG conductor is allowed 32.8 cm³ (2.00 in.³), while each 12 AWG conductor is allowed 36.9 cm³ (2.25 in.³).

Table 310.15(C)(1) requires 70 percent of table ampacity for 7–9 current-carrying conductors but 50 percent for 10–20 (4–6 conductors get 80 percent).

Per Table 430.37, a single-phase AC or DC motor on a 2-wire ungrounded supply needs only one overload unit in either conductor, while a 3-phase motor requires three overload units, one in each phase.

A general-use switch serving as the disconnect must be rated at least 200 percent of the motor full-load current, whereas 115 percent is the continuous rating required of a horsepower-rated motor-circuit switch (125 percent applies to branch-circuit conductor sizing/overload selection).

The table permits an inverse time breaker up to 250 percent of motor full-load current; if the motor will not start, the rating may be increased but shall in no case exceed 400 percent of FLC for motors of 100 A or less (300 percent above 100 A), and it is not simply moved to the next standard size.

The device is normally limited to 175 percent of rated-load current, but where that will not carry starting current it may be increased to a not-to-exceed ceiling of 225 percent of rated-load current (or branch-circuit selection current, whichever is greater), with no round-up — the next LOWER standard size must be chosen.

NFPA 70E prohibits tagout alone unless the isolating device is incapable of accepting a lock, while OSHA permits tagout where the employer demonstrates an equivalent level of safety.

In elevator installations the sum of the cross-sectional area of the individual conductors shall not exceed 50 percent of the raceway interior area, a special provision differing from the standard Chapter 9, Table 1 fill percentages.

Current tables (Table 220.42(A) in 2023, Table 120.42(A) in 2026) use 1.9 VA per square foot for a retail occupancy, whereas 3 VA per square foot was the NEC 2017 unit load for stores.

Each single or multiple receptacle on one yoke counts as at least 180 VA in a store calculation, while the 1,500 VA per circuit value applies to dwelling small-appliance (and laundry) circuits, not store receptacles.