When should flexible cords be used in electrical installations?

Flexible cords are specifically designed for temporary or portable applications because they provide the necessary flexibility and ease of movement that is required in such scenarios. These cords are ideal for tools, appliances, or wiring that may need to be frequently repositioned or relocated, such as in outdoor events, construction sites, or workshops.

In contrast, using flexible cords in permanent wiring applications or high-voltage installations could lead to safety hazards, as they are not intended to be stationary and may not meet the required strength or durability for long-term use. Similarly, underground wiring requires specific types of cables designed for direct burial that can withstand moisture and earth pressure, rather than flexible cords which are not suitable for such conditions. Thus, the use of flexible cords is limited to situations where their portability and flexibility are essential.