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The WMCU440SP is a compact metal surge protection unit combining a 100A main switch with a 2-pole Type 2 SPD rated at 40kA. Designed for installation between the meter and the consumer unit, it provides both safe isolation and surge protection in a single enclosure.

This unit helps bring existing installations in line with the 18th Edition BS 7671 regulations, which require surge protection in most domestic and commercial settings. Built in a durable 4-module steel enclosure, it offers a fast, reliable way to upgrade circuits for compliance and safety.

  • Dual protection: 100A main switch plus 40kA Type 2 SPD
  • 18th Edition compliant: Suitable for domestic and commercial upgrades
  • Compact design: 4-module metal enclosure (130 x 258 x 110mm)
  • Pre-assembled: Supplied pre-fitted for quick installation
  • Applications: Fits neatly between meter and consumer unit
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