Project Case Study

Smart Consumer Unit Installation

Modernizing residential power infrastructure with digital sub-metering, individual circuit automation, and advanced arc fault mitigation.

Modern residential power demands frequently overwhelm standard legacy fuse boards. In this comprehensive modernization project, our engineering team replaced an obsolete dual-split board with an intelligent, connected consumer unit engineered to provide real-time electrical telemetry across twelve separate household distribution branches.

Engineering Challenges and Digital Transformation

The property required dedicated power monitoring for a newly commissioned heat pump array and an electric vehicle charging station. Traditional boards lack the physical din-rail capacity and micro-circuit isolation necessary to track high-draw cyclical loads without nuisance tripping across shared neutral conductors.

Integrating active current transformers and AFDD breakers directly into the main enclosure transformed a blind electrical network into an intelligent, data-driven residential energy ecosystem.

Hardware Architecture & Circuit Breakdown

Every single circuit was mapped, thoroughly insulated, and assigned to individual Type A Residual Current Breakers with Overcurrent protection (RCBO) accompanied by Arc Fault Detection Devices (AFDD). This architectural layout eliminates whole-bank power blackouts during minor localized faults.

  • 16-way non-combustible steel enclosure with integrated Type 2 Surge Protection Device (SPD).
  • High-precision CT clamps delivering live kilowatt-hour usage metrics via secure local encrypted hub.
  • Dedicated 32A curve-B AFDD modules protecting high-draw kitchen circuits and EV charging equipment.

Following full installation and termination, comprehensive loop impedance, insulation resistance, and RCD trip-time verifications were executed. The property achieved complete regulatory compliance, certified under contemporary 18th Edition wiring regulations with zero disruption to daily household operations.

Thomas Anderson Senior Electrical Safety Inspector

Certified residential electrical specialist focusing on consumer unit installations, AFDD arc fault integration, and compliance validation.

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