Final answer:
The essential considerations for the safe use of cords and wiring include the use of a three-wire system to guard against thermal and shock hazards, circuit breakers and fuses to prevent thermal overload, and GFCIs to detect current loss and prevent shocks.
Step-by-step explanation:
The question revolves around the considerations for safe use of cords and wiring and specifically identifies that 'Two-wire type cords are not safe' as the piece of feedback to ignore. When discussing electrical safety systems and devices, a key consideration is the prevention of thermal and shock hazards.
A three-wire system, which includes a live/hot wire, a neutral wire, and an earth/ground wire, is a standard safety mechanism in household and industrial wiring. The grounding of both the neutral wire and the appliance's case is designed to protect against these hazards.
Additionally, electrical safety features also encompass circuit breakers and fuses, which interrupt excessive currents that can cause thermal overload, as well as ground fault circuit interrupters (GFCIs), which detect current loss to unintended paths to prevent shock hazards.
However, the statement 'Two-wire type cords are not safe' is not an essential consideration for safety in general, as two-wire cords can be safe when used correctly with devices that do not require grounding.
The safety of a cord or wiring system is context-dependent, based on the electrical requirements of the device and the environment in which it is used.