North Carolina Unlimited Electrical Contractor (U)

EMT must be fastened within 900 mm (3 ft) of each box, cabinet, conduit body or other termination (and at intervals not exceeding 10 ft), whereas FMC and AC cable must be secured within 12 inches.

Table values (e.g., Table 430.250 for three-phase) are used to size branch-circuit conductors and ampacity, while the nameplate current is used only for sizing separate motor overload protection.

In supervised industrial installations only, conductors protected by a device rated over 800 A may have ampacity not less than 95% of the device rating when the listed conditions are met; outside Part VIII the ampacity must be at least 100% of the device rating.

250.22(1) prohibits grounding of electric crane circuits operating over combustible fibers in Class III locations, while 250.21(A) lists systems that are merely permitted, not required, to be grounded.

For straight pulls with 4 AWG or larger conductors the box length must be at least 8 times the trade size of the largest raceway; for angle pulls the distance to the opposite wall must be at least 6 times the largest raceway trade size plus the sum of the diameters of all other raceway entries on the same wall.

At least 150 mm (6 in.) of free conductor measured from where it emerges from raceway or cable sheath is required at each outlet, junction and switch point; additionally, where the opening is less than 200 mm (8 in.) in any dimension, each conductor must be long enough to extend at least 75 mm (3 in.) outside the opening.

Two 2-wire branch circuits at another structure require a disconnect rated not less than 30 amperes, while a one-family dwelling supplied by a feeder requires not less than 100 amperes, 3-wire.

For AC polyphase motors other than wound-rotor, the nontime delay fuse maximum is 300% of full-load current, while the dual element (time-delay) fuse maximum is 175% of full-load current.

Per 240.83(D) breakers used as switches must be marked SWD or HID; SWD is the correct marking for 120-volt and 277-volt fluorescent lighting circuits.

Type MI and Type MC cable without an overall nonmetallic covering (and certain other listed cables) are permitted in plenum spaces, whereas Type NM, ENT and PVC are not permitted unless enclosed in an approved metal raceway.

In fabricated ducts, FMC is limited to lengths not exceeding 1.2 m (4 ft) to connect physically adjustable equipment; in other plenum spaces FMC is a generally permitted wiring method without that specific length limit.

In mediation an independent third-party mediator facilitates dialogue while the parties themselves set the terms of any agreement; in collaborative law the parties negotiate through their own advocates (usually lawyers) with no neutral mediator or arbitrator involved.

A master alarm box is publicly accessible AND can also be operated by remote initiating devices or an auxiliary alarm system, while an auxiliary alarm box can only be operated from remote devices or an auxiliary system and a publicly accessible alarm box houses only a manually operated transmitter.

16 AWG copper may be protected at up to 10 amperes with continuous load not exceeding 8 amperes (using a branch-circuit-rated breaker/fuse listed and marked for 16 AWG copper, or Class CC, J, or T fuse), while 5.6 amperes is the continuous-load limit for 18 AWG copper.