Refurbish or Replace LV Switchgear? A Cost and Compliance Decision Guide

TL;DR

• Refurbish LV switchgear when the gear is structurally sound, replacement parts are still available, and you cannot absorb an extended outage window.

• Replace LV switchgear when it is obsolete, parts are discontinued, or the compliance risk of keeping it running is climbing faster than the cost of new plant.

• Refurbishment typically costs 30% to 50% of full replacement but buys back only 5 to 10 years of service life.

• Replacement removes obsolescence risk entirely and resets your maintenance and compliance baseline, but needs more capital and a longer shutdown.

• A condition-based survey should always come before either decision. Guessing costs more than testing.

The decision to refurbish or replace LV switchgear comes down to four factors: the physical condition of the gear, whether spare parts are still manufactured, how much downtime your site can absorb, and how exposed you are to compliance risk if you keep ageing equipment running. There is no single right answer that applies to every building, but there is a right process for reaching one for yours.

Asset managers are usually pulled between two instincts. One says refurbish, because it is cheaper and the panels still look serviceable from the front. The other says replace, because the switchgear is old enough that nobody wants to be the person who signed off on keeping it. Neither instinct is wrong by itself. The gap between them is where poor decisions get made, usually driven by budget cycles rather than the actual condition of the equipment.

What Is the Real Difference Between Refurbishing and Replacing LV Switchgear?

Refurbishment repairs, cleans, tests and, where needed, replaces individual components within your existing switchgear enclosure. Replacement removes the entire assembly and installs new panels built to current standards. Both routes should always start with the same thing: an inspection checklist applied to every panel, not a visual walk-past.

Refurbishment usually covers busbar cleaning and re-torquing, replacement of worn contacts, breaker servicing or exchange for a remanufactured unit, insulation resistance testing, thermal imaging to confirm no hidden hot spots remain, and updated labelling. What it does not do is change the fundamental design of the switchboard. If your gear uses air circuit breakers where moulded case circuit breakers would now be specified, or the busbar system itself is undersized for current load, refurbishment cannot correct that. Only replacement can.

Replacement gives you a switchboard built to current standards, with modern protection settings, better arc flash mitigation, and manufacturer support for the next 20 to 30 years. It is the only route that resolves a genuine design or capacity shortfall rather than just extending the life of what is already there.

Is Refurbishing LV Switchgear Actually Cheaper Than Replacing It?

In most cases yes. Refurbishment typically costs 30% to 50% of a full replacement, but that lower spend buys a shorter service life extension of roughly 5 to 10 years, compared with the 25 to 30 years you would expect from new switchgear installed today.

The cost gap narrows the older and more damaged the gear is. A switchboard that has already suffered visible signs of failing switchgear, such as buzzing, tripping, or heat discolouration, often needs enough component replacement that refurbishment starts to approach 60% to 70% of new-build cost. At that point the maths stops favouring refurbishment on price alone, and the compliance and obsolescence factors below start to matter more than the invoice total.

Three things drive refurbishment cost specifically: the number of breakers needing replacement rather than servicing, whether the busbar system needs upgrading to meet current load, and how much of the works can be done live versus requiring a full shutdown. Get a fixed-price quote against a documented condition survey, not a budget estimate against a site visit.

When Does Replacement Make More Sense Than Refurbishment?

Replacement makes more sense once obsolescence risk outweighs the cost saving of refurbishment. That happens when the manufacturer has discontinued the model range, when spare breakers or relays can only be sourced second-hand, or when a single component failure would take the whole board down because no replacement part exists.

Manufacturers typically support a switchgear range for 15 to 20 years after it goes out of production, after which parts become scarce and expensive, often sourced from decommissioned boards rather than new stock. If your gear is already in that window, every refurbishment pound spent is a pound spent extending the life of equipment that will still need full replacement within the decade, just with less warning next time. The typical lifespan of LV switchgear is a useful reference point when working out where your equipment sits in that curve.

Replacement also makes more sense where load has grown beyond the original design capacity, where insurers or your electrical contractor have flagged the board as a known risk, or where a single point of failure would stop a critical process, such as a data hall, hospital ward, or production line, rather than just an office floor.

How Much Downtime Should You Budget for Each Option?

Refurbishment can often be phased panel by panel with planned, shorter outages, sometimes with temporary bypass supply keeping critical circuits live throughout. Full replacement usually needs one continuous shutdown window, because the incoming supply has to be isolated while the old board is removed and the new one is connected and commissioned.

As a rough guide, refurbishment outages run from a few hours per panel up to a weekend for a full board service. Replacement typically needs anywhere from several days to two or three weeks depending on board size, access, and whether temporary generation is brought in to keep the building running during the works. If your site cannot tolerate any extended outage, that constraint alone may settle the decision in favour of refurbishment, even where replacement would otherwise be the stronger long-term choice.

Refurbish or Replace LV Switchgear: A Simple Decision Framework

Weigh up four factors before committing to either route.

• Condition: if the enclosure, busbars and insulation are structurally sound with no evidence of overheating or arcing damage, refurbishment is viable. If there is visible corrosion, tracking, or heat damage, lean towards replacement.

• Parts availability: if the manufacturer still supports the range and breakers are available new or remanufactured, refurbishment works. If parts only come from decommissioned boards, replacement is the safer long-term route.

• Downtime tolerance: if you can only take short, planned outages, refurbishment fits better. If you can schedule a longer shutdown, replacement becomes realistic.

• Compliance exposure: if your last EICR or condition survey flagged no material concerns, refurbishment is defensible. If it flagged recurring faults or coding against the switchgear itself, replacement closes the compliance gap for good.

Score your switchgear against all four factors rather than one. A board that passes on condition but fails on parts availability is still heading towards a forced, unplanned replacement, just on a longer timeline.

What Compliance Risks Come With Delaying the Decision?

Delaying the decision does not freeze your compliance position, it erodes it. Ageing switchgear is more likely to generate EICR observations over time, more likely to be flagged as a fire risk under your fire risk assessment, and more likely to be named directly in an arc flash risk assessment once protection settings and breaker condition start to drift from their original specification.

Under the Electricity at Work Regulations 1989, duty holders have an ongoing obligation to maintain electrical systems so far as is reasonably practicable to prevent danger. A documented decision, refurbish now, replace on a defined timeline, or replace immediately, is far easier to defend to an insurer, auditor, or the Health and Safety Executive than no decision at all. Boards left in limbo for years after being flagged as a risk are the ones that turn up in incident investigations.

What Should You Do Next?

Start with a condition-based survey rather than a budget conversation. A proper survey combines thermal imaging, insulation resistance testing, and a physical inspection of breakers, busbars and connections, and gives you a documented basis for the refurbish-or-replace decision rather than a guess dressed up as a recommendation.

Protest ES Ltd's LV switchgear and testing services and LV testing team can carry out that survey, quote both routes against the same findings, and give you a like-for-like comparison rather than a sales pitch for whichever option is more profitable to deliver.

Frequently Asked Questions

How do I know if my switchgear needs replacing rather than refurbishing?

Get a condition-based survey rather than relying on age alone. If the survey finds structural corrosion, tracking, undersized busbars for current load, or breakers that are no longer supported by the manufacturer, replacement is the safer route. If the findings are limited to wear items like contacts and seals, refurbishment is usually sufficient.

Is refurbished LV switchgear as safe as new switchgear?

Properly refurbished switchgear, tested and certified against current standards, is safe to operate, but it will not match the protection performance or design margin of new equipment. Refurbishment restores the switchgear to a safe working condition within the limits of its original design, it does not upgrade that design.

How much does it cost to refurbish LV switchgear compared to replacing it?

Refurbishment typically costs 30% to 50% of full replacement, though this rises towards 60% to 70% for badly deteriorated boards needing extensive component replacement. Get fixed-price quotes for both routes against the same condition survey so you are comparing like with like.

Can obsolete or discontinued switchgear still pass an EICR?

Yes, an EICR assesses the current safety condition of the installation against BS 7671, not whether the switchgear model is still in production. However, obsolete switchgear is statistically more likely to generate observations over successive inspections as components age and spares become harder to source for remedial work.

How long does LV switchgear refurbishment usually take?

A single panel service can take a few hours to a day. A full board refurbishment, covering all panels, busbar work and breaker servicing, typically takes a long weekend to a week, often phased to keep critical circuits live throughout.

What happens if I keep running switchgear past its expected lifespan?

The failure risk does not rise gradually, it tends to increase sharply once switchgear passes its expected service life, because insulation, contacts and mechanisms degrade in ways that are not always visible during a routine inspection. You also lose manufacturer support for spare parts, which extends repair times significantly if something does fail.

Who should carry out a refurbish-or-replace assessment on my switchgear?

Use a specialist electrical contractor with LV switchgear experience, not a generalist electrician. They should combine thermal imaging, insulation resistance testing and physical inspection, and should be able to quote both refurbishment and replacement against the same findings so you can compare them fairly.