Final answer:
The principle not typically found in codes of ethics for engineering consultants is the prioritization of service to humankind above personal gain, as codes focus more on professional conduct and responsibilities.
Step-by-step explanation:
The principle not embodied in codes of ethics for engineering consultants is: Consulting engineers will place service to humankind above personal gain. This principle is idealistic and while it is encouraged, it is not typically found as a requirement in professional codes of ethics, which focus on practical obligations and professional conduct rather than personal sacrifice for the greater good. Codes of ethics, such as those by IEEE-CS, emphasize professional practice, fidelity to clients, fairness, integrity, and the advancement of the profession rather than prioritizing service to humankind above personal gain.