Commercial Rewiring in Cheshire: When Do You Need It?

The Warning Signs Your Cheshire Commercial Premises Needs Rewiring

Electrical installations don't last forever. Most commercial wiring has a lifespan of 25–40 years, depending on the quality of the original installation, how heavily it's been used, and whether it's been maintained. For Cheshire businesses operating from older premises — particularly town centre buildings in Wilmslow, Knutsford, or Alderley Edge — the wiring may be well past its safe working life.

The most reliable way to assess your installation is an EICR (Electrical Installation Condition Report). But there are also visible warning signs that suggest a rewire may be needed urgently.

7 Warning Signs to Watch For

• Frequently tripping circuits: If your RCDs or MCBs trip regularly, it's a sign the installation is struggling with the electrical load or has a fault
• Burning smell or scorch marks: Any smell of burning plastic or scorch marks around sockets, switches, or the consumer unit is a serious warning sign requiring immediate attention
• Old rubber or fabric-insulated wiring: Pre-1970s wiring used rubber or fabric insulation that degrades over time — this is a C1 (danger present) finding on any EICR
• No RCD protection: Modern installations require RCD protection on all circuits. Older consumer units with rewirable fuses offer no RCD protection
• Insufficient sockets: If your staff are relying on extension leads and multi-way adaptors, your installation wasn't designed for modern electrical loads
• Failed EICR: A C1 or C2 observation on your EICR report means remedial work is required — in many cases, a full or partial rewire is the most cost-effective solution
• Planned refurbishment: If you're refitting your Cheshire premises, it's the ideal time to rewire — before new ceilings and walls go in

What Happens During a Commercial Rewire?

A commercial rewire involves replacing all the fixed wiring in your premises — from the consumer unit or distribution board through to every socket, switch, and light fitting. The process typically follows these stages:

1. Survey and design: We assess your premises, calculate load requirements, and design the new installation to current BS 7671 standards
2. First fix: New cables are run through walls, floors, and ceilings — this is the most disruptive phase
3. Consumer unit installation: A new consumer unit with full RCD and RCBO protection is installed
4. Second fix: Sockets, switches, and light fittings are connected and fitted
5. Testing and certification: Full testing to BS 7671 and issue of an Electrical Installation Certificate (EIC)

Minimising Disruption to Your Cheshire Business

We understand that downtime costs money. For Cheshire businesses that can't close during a rewire, we offer phased rewiring — working through the building section by section, keeping the rest operational. We can also schedule work outside business hours, at weekends, or during planned closure periods.

Frequently Asked Questions