What are critical components of a safe electrical installation?

The correct choice highlights the importance of using correct materials and adhering to established standards as critical components of a safe electrical installation. This is fundamental because electrical systems must operate safely and efficiently, preventing hazards such as electrical shocks, fires, or system failures. Using the right materials — such as cables, connectors, and protective devices — that meet regulatory standards ensures that the installation can handle specific loads, environmental conditions, and potential fault conditions.

Additionally, adherence to standards often includes codes and regulations published by various bodies, ensuring the installation meets safety and performance benchmarks. Following these guidelines helps mitigate risks associated with improper installations, such as using substandard materials or incorrect configurations that could lead to dangerous situations.

In contrast, while the use of multiple circuit breakers and insulation of all wires are both practices that may improve safety, they do not encompass the entirety of what makes an installation safe. Employing a higher voltage supply without proper safety measures and components can lead to increased risks rather than enhanced safety, making it vital to prioritize the correct use of materials and compliance with standards.