Insurance for Switchgear, Transformers & Power Components (UK): A Practical Guide

Introduction

If your business designs, manufactures, installs, repairs, refurbishes, tests, stores or distributes switchgear, transformers and other power components, your risk profile is very different to a “standard” engineering firm. You’re dealing with high-value equipment, strict specifications, complex supply chains, and the potential for serious property damage and business interruption if something goes wrong.

This guide explains the core insurance covers UK switchgear and transformer businesses typically need, where claims usually come from, and what insurers look for when pricing the risk. It’s written for UK businesses working in LV/MV/HV environments, including OEMs, panel builders, service contractors, and specialist distributors.

Why this sector is seen as higher risk

Switchgear and transformer work sits at the intersection of electrical safety, fire risk, product performance and contractual liability. A single fault can lead to:

• Fire and smoke damage in substations, plant rooms, factories or commercial buildings
• Extended downtime while replacement parts are sourced and tested
• Knock-on losses for your client (missed production, penalties, lost revenue)
• Complex investigations involving engineers, loss adjusters, and sometimes regulators

Even when nobody is injured, claims can be expensive because the equipment is specialist, lead times can be long, and access to sites can be restricted.

Who this blog is for

This applies to UK businesses such as:

• Switchgear manufacturers and panel builders (LV/MV)
• Transformer manufacturers, refurbishers and repairers
• Power distribution component suppliers (breakers, relays, busbars, CTs/VTs, protection devices)
• Testing, commissioning and maintenance contractors
• Warehousing and distribution operations holding high-value stock
• Exporters/importers of power components

The core insurance covers to consider

Most businesses in this space need a combination of covers rather than a single policy. The right mix depends on whether you manufacture, install, service, or simply distribute.

1) Public Liability (PL)

What it covers: Claims from third parties for injury or property damage arising from your business activities.

Why it matters: A dropped component, an arc-flash incident caused by poor isolation, or accidental damage to a client’s plant room can all trigger PL claims.

Common requirements: Many contracts ask for £2m–£10m PL limits, especially for work on commercial/industrial sites.

2) Employers’ Liability (EL)

What it covers: Injury or illness claims from employees.

UK note: EL is a legal requirement for most employers in the UK.

Why it matters: Electrical work, manual handling, working at height, and site environments increase the likelihood of injury claims.

3) Product Liability & Product Recall (where relevant)

What it covers: Claims arising from products you manufacture, supply or import.

Why it matters: If a breaker, relay, panel, transformer component or assembled unit fails and causes damage, the allegation may be that the product was defective.

Recall/rectification: Standard product liability often focuses on third-party injury/property damage, not the cost to recall or replace your own product. If you supply critical components at scale, product recall/rectification can be worth exploring.

4) Professional Indemnity (PI) / Design & Advice liability

What it covers: Financial loss claims arising from professional services—design, specification, advice, calculations, drawings, and sometimes testing/inspection reports.

Why it matters: Many switchgear and transformer businesses do more than “build to print”. If you specify ratings, protection settings, coordination, thermal performance, or advise on installation, you can face claims for:

• Wrong specification leading to failure or underperformance
• Incorrect settings or coordination causing nuisance trips or damage
• Errors in drawings or documentation
• Inadequate testing or certification

5) Contract Works / Erection All Risks (EAR) (for installers)

What it covers: Loss or damage to works in progress and materials on site, often including transit and temporary storage.

Why it matters: Switchgear and transformer projects can involve high-value items sitting on site before energisation. Risks include theft, water ingress, accidental damage during positioning, and fire.

6) Tools, plant and equipment (own plant)

What it covers: Your own tools, test equipment, lifting gear, and portable plant.

Why it matters: Specialist test equipment (e.g., primary injection kits, insulation testers, thermal imaging cameras) can be expensive and essential to operations.

7) Property insurance (buildings, contents, stock)

What it covers: Damage to your premises and assets from insured events such as fire, flood, storm, escape of water, theft.

Key point for this sector: Insurers will pay close attention to:

• Fire load and storage of oils/resins
• Battery charging areas (if applicable)
• Hot works controls (welding, grinding)
• Electrical maintenance and housekeeping
• Security for high-value stock

8) Business Interruption (BI)

What it covers: Loss of gross profit and increased costs of working following insured property damage.

Why it matters: If a fire, flood, or major equipment failure stops production, BI can be the difference between a tough quarter and a business-threatening event.

Watch-outs:

• Set the right indemnity period (often 12–24 months for specialist manufacturing)
• Consider supplier/customer extensions if a single supplier or key customer drives revenue

9) Goods in Transit / Marine Cargo

What it covers: Loss or damage to goods while being transported.

Why it matters: Transformers and switchgear can be damaged by impact, poor packing, moisture, or mishandling. Even smaller components can be high-value.

10) Cyber insurance

What it covers: Costs and liabilities from cyber incidents (ransomware, data breach, business interruption, extortion, incident response).

Why it matters: Engineering firms increasingly rely on CAD files, test certificates, supplier portals, and email-based payment processes. A cyber incident can halt production or lead to invoice fraud.

Typical claims in switchgear and transformer businesses

Insurers price risk based on how claims happen in real life. Common scenarios include:

• Transit damage to a transformer or panel leading to rework, delays and contractual disputes
• Water ingress during storage or on-site staging causing insulation failure
• Overheating from poor ventilation/clearances or incorrect rating assumptions
• Loose connections causing arcing and fire damage
• Incorrect protection settings leading to equipment damage or prolonged outages
• Installation damage during craning/positioning
• Theft of copper, breakers, or specialist components
• Documentation errors (wrong labels, drawings, or test results) leading to costly site delays

Key risk factors insurers will ask about

Expect insurers (and underwriters) to focus on these areas:

Nature of work

• Manufacture vs refurbishment vs service/maintenance vs distribution
• Voltage ranges (LV/MV/HV)
• Work on live systems (and your isolation/permit processes)
• Domestic vs industrial vs utility environments

Quality control and testing

• Incoming inspection of components
• Factory acceptance testing (FAT) and site acceptance testing (SAT)
• Calibration records for test equipment
• Traceability and documentation control

Contractual risk

• Use of standard terms vs client-drafted contracts
• Any liquidated damages, performance guarantees, or “fitness for purpose” clauses
• Limits of liability and whether you can cap consequential loss

Fire and security

• Fire detection and alarm monitoring
• Sprinklers (where present)
• Storage arrangements for high-value stock
• CCTV, intruder alarms, access control, key management

Subcontractors and labour

• Competence management and training
• Use of subcontractors and how you vet them
• RAMS, permits to work, and supervision

How to keep premiums sensible (without cutting cover)

Insurers tend to reward evidence of control. Practical steps include:

• Documented QA: clear build records, torque settings, checklists, sign-offs
• Testing discipline: FAT/SAT procedures, calibration logs, test certificates
• Moisture control: storage standards, desiccants, packaging, humidity monitoring
• Contract review: avoid accepting uncapped consequential loss; align liability caps to insurance
• Hot works permits and housekeeping to reduce fire risk
• Security upgrades for copper/high-value components
• Incident learning: near-miss reporting and corrective actions

Choosing limits and structuring your programme

There isn’t a single “right” limit, but a sensible approach is:

• Match contract requirements for PL/EL
• Set PI based on worst-case financial loss from design/spec errors and your largest projects
• Ensure products liability reflects where your products end up (industrial sites, critical infrastructure)
• For property/stock, insure on reinstatement and realistic peak stock levels
• For BI, choose an indemnity period that reflects replacement lead times and requalification

What to prepare before you request a quote

A clean submission can reduce delays and improve terms. Have ready:

• Turnover split by activity (manufacture/service/distribution) and by territory
• Largest contract value and typical project values
• Details of products (types, ratings, end-use sectors)
• QA/testing procedures and accreditations (if any)
• Claims history (including near misses if you track them)
• Copies of standard terms and any key client contract clauses
• Property details: construction, protections, security, and stock values

Final thoughts

Switchgear, transformers and power components are essential to modern infrastructure, but they come with a unique blend of technical, fire, and contractual risks. The good news is that many of those risks are insurable—if the cover is structured correctly and the insurer understands your processes.

If you want, I can tailor this into a version aimed at one specific audience (e.g., transformer refurbishers, MV panel builders, or testing/commissioning contractors) and add a stronger call-to-action for Insure24’s quote process.

FAQ (UK)

Do I need Professional Indemnity if I only build to a client’s drawings?

If you truly build to print with no design input, PI may be less critical. But many businesses still provide advice, minor design decisions, or certification/testing reports. If you do any of that, PI is worth discussing.

Does product liability cover the cost to replace my faulty switchgear?

Usually it covers third-party injury/property damage caused by the product. The cost to replace/recall your own product may require additional cover such as recall/rectification.

What’s the difference between Contract Works and Public Liability?

Public liability is about injury/property damage to others. Contract works (EAR) is about damage to the works/materials you’re responsible for during the project, including items on site before handover.

Can I insure high-value stock held in a warehouse?

Yes, but insurers will want to understand security, fire protections, and how stock is stored (including packaging and moisture control).

Do I need cyber insurance as an engineering business?

If you rely on email, CAD files, supplier portals, and digital documentation, cyber cover can help with ransomware, data breaches, and business interruption from IT outages.