Except as otherwise provided in subsection (b1) of this section, whenever the signal is given the driver shall indicate his intention to start, stop, or turn by extending the hand and arm from and beyond the left side of the vehicle as hereinafter set forth.
Left turn - hand and arm horizontal, forefinger pointing.
Right turn - upper arm horizontal, forearm and hand pointed upward.
Stop - upper arm horizontal, forearm and hand pointed downward.
All hand and arm signals shall be given from the left side of the vehicle and all signals shall be maintained or given continuously for the last 100 feet traveled prior to stopping or making a turn. Provided, that in all areas where the speed limit is 45 miles per hour or higher and the operator intends to turn from a direct line of travel, a signal of intention to turn from a direct line of travel shall be given continuously during the last 200 feet traveled before turning.
Any motor vehicle in use on a highway shall be equipped with, and required signal shall be given by, a signal lamp or lamps or mechanical signal device when the distance from the center of the top of the steering post to the left outside limit of the body, cab or load of such motor vehicle exceeds 24 inches, or when the distance from the center of the top of the steering post to the rear limit of the body or load thereof exceeds 14 feet. The latter measurement shall apply to any single vehicle, also to any combination of vehicles except combinations operated by farmers in hauling farm products.
N.C. Gen. Stat. § 20-154