6.18Summary#

6.18.1Power surge protection devices#

• Determine if SPDs are required.
• Provide primary line-to-neutral protection at installation entry.
• Provide secondary line-to-neutral and neutral-to-earth protection at DB or equipment if required.
• Select surge rating in accordance with table for location.
• Ensure 10–20 m cable between primary and secondary protection.
• Provide 32 A or 63 A SPD fuse.
• Keep SPD cables short and straight.
• Design good earthing and bonding.
• Communications surge protection devices
• Determine if SPDs are required.
• Provide primary protection at installation entry close to MSB.
• Provide secondary protection at equipment if required.
• Refer communications equipment manufacturer for SPD recommendations.
• Connect communications SPD earth and power SPD earth to common earth point.
• Connect common earth point to electrical earth.
• Keep SPD cables short and straight.
• Design good earthing and bonding.