Type 3 Surge Protective Devices must meet which requirement regarding their connection from the distance to service disconnect?

Type 3 Surge Protective Devices (SPDs) are designed to provide surge protection for electrical equipment by being installed as close as possible to the equipment they are meant to protect. However, their installation must adhere to specific guidelines, which are typically outlined in the manufacturer's instructions.

The requirement that the connection distance from the Surge Protective Device to the service disconnect must align with the manufacturer's specifications is essential to ensure both safety and effective operation. Manufacturers provide detailed instructions based on testing and design specifications that ensure the device functions optimally in conjunction with the electrical system it serves.

This alignment with the manufacturer's recommendations helps ensure that the device provides the intended protection, as improper installation can lead to diminished performance or even failure, negating the benefits of having a surge protective device in the first place. Following these guidelines is crucial for compliance with local codes and the National Electrical Code (NEC), which advocate for the performance and reliability of surge protection systems.

In summary, the requirement to adhere to the manufacturer's instructions ensures that the SPD is installed correctly, allowing it to perform effectively within the established parameters, thereby safeguarding electrical systems from surges and transients.