Is a SPD the Same as a TVSS?

Transient voltage surge suppressors (TVSSs) are also known as Type 2 and Type 3 surge protective devices (SPDs).

a) True
b) False

See answer and applicable Code reference

The correct answer is: a) True

Article 285 covers general requirements and installation & connection requirements for SPDs permanently installed on premises wiring systems 1kV or less. As shown in Informational Note No. 2, "Transient voltage surge suppressors (TVSSs) are also known as Type 2 and Type 3 SPDs."

 

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