★★★★★
“Fantastic from start to finish. 19 sockets, bathroom fans and more — they barely left a mark in the house. Polite, professional and lovely to have in my home. Would absolutely recommend anytime.”
// Fuse Board & Fault Finding //
Commercial Fuse Board & Fault Finding in Cork
Commercial distribution board upgrades and systematic electrical fault diagnosis for Cork businesses — correct the problem, not just the symptom.
★★★★★
4.8 · 64 Reviews
·
RECI Registered·Safe Electric Registered
// About This Service //
Cork’s Commercial Electrical Fault Specialists
Haven Electrical carry out commercial distribution board upgrades and systematic electrical fault diagnosis for businesses across Cork City and County. Electrical faults in commercial premises — tripping RCDs, persistent nuisance trips, unexplained power losses, or hot panels — can disrupt operations, damage equipment, and in serious cases present a fire or safety risk. We use systematic diagnostic procedures to locate the root cause of faults, not just reset breakers and hope. We carry out distribution board replacements for aged commercial switchgear, and upgrade older consumer units to comply with current Irish electrical regulations.
Systematic Fault Finding
We use proper diagnostic procedures — insulation testing, loop impedance testing, and thermal imaging — to locate root causes.
Distribution Board Upgrades
Commercial-grade board replacements with correct circuit protection, RCD coverage, and surge protection where required.
RECI & Safe Electric
All commercial fault finding and board upgrades carried out by RECI and Safe Electric registered electricians.
Same-Day Emergency Response
For commercial premises with critical faults, we prioritise same-day response where possible.
// What You Get //
What’s Included in Commercial Fault Finding & Board Work
Initial fault diagnostic assessment
Systematic inspection and testing to locate the root cause of the fault before any work is done.
Insulation resistance testing
Megger testing of circuits to identify deteriorated insulation — the most common cause of tripping RCDs.
Earth fault loop impedance testing
Loop impedance measurements to verify circuit protection operates within required times.
Thermal imaging (where required)
Thermal camera inspection of distribution boards and connections to identify overheating issues.
Distribution board replacement
Full commercial-grade board replacement with correct MCB and RCD protection for each circuit type.
RCD protection upgrade
Retrofit of RCD protection to circuits not currently covered — particularly important for older commercial installations.
Circuit labelling and schedule update
All circuits correctly labelled and board schedule updated to reflect current installation.
Full testing after remediation
All affected circuits retested and confirmed safe before sign-off.
RECI certificate on completion
Certificate of compliance issued for all distribution board upgrade work.
// SIMPLE PROCESS //
How It Works
1
Fill In The Form
Takes less than 60 seconds. Tell us about your job and where you’re based in Cork.
2
Send Us Photos or a Video
We’ll send you a WhatsApp message so you can show us the job. Helps us give you an accurate quote without a wasted visit.
3
Get Your Quote & Book In
We’ll come back to you within 24 hours with a price. Agree a day and time that suits you — we’ll be there.
// Why Choose Haven //
Get a Free Quote
Why Cork Businesses Choose Haven Electrical
Root Cause, Not Symptoms
Resetting a tripping breaker doesn’t fix the problem. We find the underlying fault — whether it’s deteriorated insulation, a failing appliance, or an overloaded circuit — and fix it properly.
Minimise Downtime
We work quickly and systematically to minimise the time your circuits are offline. We’ll explain what we’re finding and get your agreement before carrying out any remedial work.
Commercial Board Experience
Commercial distribution boards are more complex than domestic consumer units. We’ve worked on main and sub-distribution boards across Cork commercial and industrial premises for 15+ years.
Full Certification
Every distribution board upgrade is fully tested and RECI certified. You have the documentation you need for insurance and compliance.
// Customer Reviews //
What Cork Customers Say
★★★★★
“We’re so pleased with the service from Haven Electrical Limited. Everything was handled quickly and efficiently, from the prompt replies to getting us scheduled in right away. The technician Caoilte was professional, friendly, and a pleasure to work with.”
★★★★★
“Sent an email for a quote on Monday. Had a phone call Tuesday morning and had Haven call Thursday! Very happy with the turn around, highly recommend. Very clear on prices and affordable for those small jobs around the house. Will definitely use again!”
// FAQs //
Commercial Fault Finding & Fuse Boards FAQs
RCDs trip when they detect a fault current to earth — typically caused by damaged cable insulation, a faulty appliance, moisture ingress in a fitting or socket, or an overloaded circuit. The most common cause in commercial premises is degraded insulation in old wiring or a single faulty piece of equipment. We carry out systematic insulation testing to isolate which circuit or equipment is causing the trip, rather than guessing or isolating circuits one by one until the tripping stops.
Yes — replacing aged commercial distribution boards is one of our most common commercial jobs. Older boards may use obsolete MCBs that are no longer manufactured, have inadequate RCD protection, or lack the capacity for additional circuits. A modern commercial distribution board provides correct circuit protection for every circuit type, RCD protection as required by current regulations, and the capacity for future modifications. All board upgrades are RECI certified.
Thermal imaging uses an infrared camera to detect heat sources in electrical installations without contact or dismantling. Overloaded connections, failing MCBs, and deteriorating busbars all produce elevated temperatures that are invisible to the naked eye but clearly visible on a thermal camera. We use thermal imaging for distribution board surveys and for investigating persistent electrical problems where visual inspection hasn’t identified the cause.
Yes — intermittent faults are often the hardest to diagnose. They may appear at specific times of day, under certain load conditions, or only when equipment has been running for some time. We use a combination of insulation testing, loop impedance measurement, visual inspection, and thermal imaging to build a picture of where the fault is likely to be. For faults that only appear under load, we may need to attend when the fault conditions are active.
A straightforward fault where the tripping circuit is known and the fault is on a single cable or appliance can often be isolated and repaired in 2–4 hours. Complex faults involving multiple circuits, intermittent behaviour, or large premises can take longer. We provide a time estimate after the initial diagnostic assessment and get your agreement before proceeding with any work beyond the initial diagnosis.
Yes — surge protection devices (SPDs) can be installed at the main distribution board to protect sensitive commercial equipment from mains voltage transients. Transient overvoltages are a common cause of damage to electronic equipment and control systems. We specify and install Type 1 and Type 2 SPDs as appropriate for the installation. Surge protection is particularly recommended for premises with significant IT equipment, PLC-controlled machinery, or sensitive process control systems.
Yes — we offer out-of-hours emergency response for commercial premises with urgent electrical faults. For contract customers, we have an agreed out-of-hours call-out arrangement. For one-off emergency calls, we respond as quickly as possible subject to availability. Call 021 203 2045 and we’ll do our best to assist.
A commercial distribution board should be replaced when: the MCBs or RCDs are no longer available as spares; the board has insufficient capacity for current or planned circuits; the board has inadequate RCD coverage compared with current regulations; internal components show significant degradation; or the board has been involved in a serious overload or fault condition. We assess the existing board before recommending replacement — if it can be economically repaired or upgraded rather than replaced, we’ll say so.
// Related Services //
Related Commercial Services
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Maintenance Contracts
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Factory & Plant Wiring
Industrial three-phase wiring and distribution for Cork manufacturing and processing facilities.
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// Free Quote //
Get Your Free Fault Diagnosis or Board Upgrade Quote
Same-day response available · Root cause diagnosis · RECI certified
Get in Touch
021 203 2045
Unit 5, Carrigaline Industrial Estate,
Co Cork
Co Cork
★ 4.8 Google Rating · 64 Reviews
✓ Safe Electric Registered
🏆 All-Ireland Business All-Star