South Carolina - NASCLA-Accredited Trade Examination for Residential Electrical Contractor

A straight pull requires the box length to be not less than 8 times the trade size of the largest raceway, while an angle pull requires not less than 6 times the largest raceway in the row plus the sum of the other raceway entries in that same row on the same wall.

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

Table 300.5(A) requires 150 mm (6 in.) for RMC/IMC only in locations not otherwise specified, but 450 mm (18 in.) where buried under a one- and two-family dwelling driveway or dwelling-use outdoor parking area (600 mm/24 in. under general streets, roads, alleys, and parking lots).

NEC 230.24(B) requires a minimum 5.5 m (18 ft) over public streets, alleys, roads, and parking areas subject to truck traffic, but only 3.7 m (12 ft) over residential property, driveways, and commercial areas not subject to truck traffic where voltage does not exceed 300 volts to ground.

A luminaire not identified for contact with insulation must have recessed parts spaced not less than 13 mm (1/2 in.) from combustible material and thermal insulation kept at least 75 mm (3 in.) away, whereas a luminaire identified as Type IC is not subject to that 3 in. insulation separation.

Per 404.14(A) an AC general-use snap switch may control tungsten-filament lamp loads not exceeding its ampere rating at 120 volts with no T rating, while per 404.14(C) an AC-DC general-use snap switch may control tungsten-filament loads only where it is rated with the letter T.

NEC 690.7 limits PV system dc circuits within or originating from arrays on or attached to buildings (and inside buildings) to not more than 1000 volts, but the limit is 600 volts for one- and two-family dwellings.

The tapped control circuit is protected under 430.72, while a control circuit other than such a tapped circuit must be protected against overcurrent per 724.43 or the notes to Chapter 9 Tables 11(A) and 11(B), as applicable.

A one-family dwelling unit supply disconnect must be rated not less than 100 amperes, while all other installations (not one-circuit at 15 A or two-circuit at 30 A) require a disconnect rated not less than 60 amperes.

Article 100 defines busway itself as a raceway (metal enclosure with factory-mounted bare or insulated conductors), whereas a cable tray system is a structural support system, lighting track is an assembly that supports and energizes luminaires, and a multioutlet assembly only contains a raceway.

Free float is the time an activity can be delayed without impacting the early start of the next activity, while total float is the leeway available without delaying the overall project completion date (contingency time is a buffer between tasks for unforeseen delays).

Table 240.6(A) ratings apply to both, but 1, 3, 6, and 601 amperes are additional standard ratings for fuses only, so 601 is a fuse-only standard rating.

Calendar scheduling's main advantage is linking tasks to specific dates (deliveries, payments, vacations/holidays), but both calendar and bar chart methods share the weakness of not showing interdependencies of activities or the impact a delayed task has on other tasks.