UJI 13-1405. Ordinary care; evidence.

What is customarily done by those engaged in the supplier’s business is evidence of ordinary care. However, what ought to be done is fixed by a standard of ordinary care, whether it is usually complied with or not. Compliance with [industry [customs] [standards] [codes] [rules__ [or] [governmental [rules] [standards] [codes__ is evidence of ordinary care, but it is not conclusive.