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Cat A & Cat B Fit-Out Electrical Installation – BS 7671 Compliant


At Solus electrical, we specialise in delivering high-quality Cat A and Cat B fit-out electrical installations that adhere to the highest British Standard regulations and BS 7671 Wiring Regulations. Whether you’re upgrading office spaces, retail units, or commercial facilities, we provide comprehensive electrical services designed to meet your exact needs.


⚡ What is a Cat A and Cat B Fit-Out?

  • Cat A Fit-Out: This is the base level fit-out that prepares a commercial space for occupation. It involves the installation of essential systems such as lighting, power, data, HVAC (heating, ventilation, and air conditioning), and fire alarms. Cat A is typically focused on the building’s core services and infrastructure, readying the space for future interior design and customization.
  • Cat B Fit-Out: This is the next stage and involves more detailed work, such as customizing the space for the tenant’s specific needs. It includes the installation of partitions, furniture, specialized lighting, bespoke electrical systems, and other specific requirements, ensuring the space is fully functional for the tenant’s use.

Both types of fit-outs require precise electrical design and installation to ensure they are compliant with BS 7671 and local building regulations.


🏢 Our Cat A & Cat B Electrical Installation Services

1. Cat A Electrical Installation

Our Cat A installations are designed to provide the necessary base infrastructure for your commercial space. Services include:

  • Lighting & Power: Installation of general lighting systems, including LED and emergency lighting in accordance with BS 5266.
  • Distribution Boards: Supply and installation of mains distribution boards to ensure safe distribution of electrical power throughout the building.
  • Data & IT Infrastructure: Setting up data cabling systems for IT networks, telephone systems, and any future-proofing for high-speed internet and smart technologies.
  • HVAC and Fire Alarm Systems: Installation of electrical connections for heating, ventilation, and air conditioning systems, as well as fire alarm systems in compliance with BS 5839.
  • Earthing & Bonding: Ensuring all systems are properly earthed and bonded to meet safety standards as per BS 7671.

2. Cat B Electrical Installation

For Cat B fit-outs, we take a more tailored approach to meet the specific needs of the tenant. Services include:

  • Bespoke Lighting Solutions: Custom lighting installations to suit the client’s needs, including task lighting, feature lighting, and office-specific layouts. We ensure these are compliant with energy efficiency regulations.
  • Additional Power Outlets: Installation of extra sockets and dedicated circuits for specialized equipment or office machinery.
  • Smart Technology Integration: Wiring and installing smart controls for lighting, HVAC, security systems, and other technologies to create energy-efficient and tech-forward office spaces.
  • Workstation Wiring: Installing power and data sockets, floor boxes, and other infrastructure to support office desks and workstations.
  • Security Systems: Installation of CCTV, access control, and intruder alarm systems to enhance the security of the premises.
  • Audio Visual (AV): Setup of AV systems, including projector wiring, integrated sound systems, and interactive boards.


✅ Why Choose solus electrical for Your Cat A & Cat B Electrical Fit-Out?

  • BS 7671 Compliant: All our installations meet the latest 18th Edition Wiring Regulations and other relevant British Standards.
  • Experience Across Sectors: We have extensive experience with office fit-outs, retail units, industrial spaces, and education facilities, ensuring tailored solutions for every project.
  • End-to-End Service: From initial design consultation and project management to final installation and testing, we offer a complete solution.
  • Safety & Reliability: We use high-quality, reliable components, ensuring the safety and durability of the installation.
  • Project Timelines: We work efficiently to meet your deadlines, keeping disruption to a minimum and ensuring your fit-out is completed on time and within budget.


🧾 What You’ll Receive:

  • Comprehensive Electrical Design: Tailored to your specific fit-out needs and compliant with BS 7671.
  • Detailed Installation Plan: A clear outline of the installation process, from power distribution to final testing.
  • Certification & Documentation: Full Electrical Installation Certificates (EIC) upon completion, verifying compliance with all standards.
  • Ongoing Support & Maintenance: We provide ongoing support to ensure your electrical systems are maintained and compliant for the long term.


Whether you’re fitting out a brand-new office space or upgrading a retail unit, Solus electrical offers end-to-end electrical services for both Cat A and Cat B fit-outs, ensuring your installation is compliant, efficient, and future-proof.