Nevada Jury Instructions
EVIDENCE OF CUSTOM IN RELATION TO ORDINARY CARE
Evidence as to whether or not a person conformed to a custom that has grown up in a given locality or business is relevant and ought to be considered, but is not necessarily controlling on that question of whether or not he exercised ordinary care; for that question must be determined by the standard of care that has been stated to you.
NEV. J.I. 4.10
BAJI 3.16