What is considered a significant risk if wires are improperly installed?

Improper installation of wiring can lead to serious safety hazards, with electrical shock and fire risks being among the most significant. When wires are not installed correctly, several issues can arise. For example, loose connections can generate excessive heat, which increases the likelihood of a fire starting within walls or ceilings. Additionally, exposed or improperly insulated wires can pose a risk of electrical shock to anyone who comes into contact with them. These dangers highlight the importance of following proper installation procedures and standards to ensure the safety of electrical systems in residential settings.

The other choices, such as increased lifespan of the wiring, reduced electricity bills, and improved circuit performance, suggest positive outcomes that are not associated with improper installation. Instead, improper installation typically leads to negative consequences, underscoring the significance of adhering to safe and appropriate practices in electrical work.