Journeyman Electrician Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The acronym SPD stands for Surge Protective Device. This term is widely used in electrical installations to refer to devices designed to protect electrical systems from voltage spikes, commonly caused by lightning strikes or power surges. These devices are critical for preventing damage to sensitive electrical equipment and maintaining the integrity of electrical systems.

Surge Protective Devices function by redirecting excess voltage away from equipment and safely dissipating it, helping to ensure the longevity and reliability of electrical installations. Their implementation is an essential aspect of electrical system design, particularly in areas prone to electrical disturbances.

While other terms like Service Protection Device and Surge Protector Device are related to the function of SPDs, they do not accurately capture the accepted terminology used in the electrical industry. "Service Power Device" is not a recognized term in this context, which further emphasizes the importance of understanding the precise language used in professional electrical work.