Home / Kitchen Extraction Cleaning / Guide
Kitchen extraction cleaning - electrics
A kitchen that trips the electrics when everything's running is disruptive and worrying - and it's largely an electrical matter for a qualified electrician. Overloaded circuits or a fault are the usual causes. But one contributor can be the extract fan: a grease-laden fan drawing more current as it strains. Here is why a kitchen trips under load, and where the extraction fits in. This is general guidance, not electrical advice.
The short answer
A kitchen tripping the electrics when everything's on at once is a frustrating and potentially serious problem - and it's mostly an electrical matter. But since the extract fan is one of the electrical loads, a grease-laden fan can play a part, which is why it's worth understanding where the extraction fits. Here's why a kitchen trips under load. This is general guidance, not electrical advice; electrical issues are for a qualified electrician. First: it's mostly electrical. A kitchen tripping the electrics under load is largely an electrical matter, and the usual causes are electrical. Overloaded circuits. The most common cause of tripping 'under load' is too much equipment drawing current on a circuit at once, exceeding the circuit's rating - so the protective device (fuse or breaker) trips to protect the circuit. When lots of high-power kitchen equipment (ovens, fryers, etc.) runs together, the load can exceed what a circuit is designed for. An electrical fault. A fault in equipment or wiring (an earth leakage or short) can trip an RCD or breaker - sometimes appearing under load as equipment heats up or draws current. An inadequate or ageing installation. An electrical installation not sized for the kitchen's load, or ageing, can trip when heavily loaded. Get an electrician. Because tripping under load is an electrical matter - and a potential safety and fire risk (electrical faults and overloads can be dangerous) - it should be investigated and put right by a qualified electrician. They can identify whether it's an overload (needing load redistribution or an upgrade), a fault (needing repair), or an installation issue - and address it safely. This is the main thing to do. Where the extraction fits in. Now, where does the extraction come in? The extract fan is one of the electrical loads in the kitchen, and a grease-laden fan can draw more current than a clean one. Here's why: grease loads and unbalances the fan, so its motor has to work harder to turn it - and a harder-working (straining) fan motor can draw more current. In the extreme, a fan seizing or developing a fault from grease can draw excess current or trip its own protection. So a grease-laden, overworked extract fan adds more to the electrical load than a clean, efficient one would - and in a marginal situation (a circuit already near its limit), that extra draw could contribute to tripping (or the fan's own circuit could trip if the fan draws too much). So the extraction can be one factor. Keeping the fan clean helps. So keeping the extract fan clean (so it runs efficiently, drawing normal current rather than straining) removes that contribution to the electrical load. It won't fix a genuine circuit overload or fault (those are electrical issues for the electrician), but it ensures the fan isn't adding avoidable extra load through being grease-laden. So a clean fan is one thing that helps - alongside the electrical investigation. Keep it in proportion. But keep this in proportion: the extraction is only one possible contributor, and usually a minor one. A kitchen tripping under load is mostly about the electrical circuits and any fault - which is the electrician's domain, not the cleaner's. So don't assume cleaning the fan will fix the tripping; the main answer is an electrical investigation. The extraction cleaning just removes one avoidable factor. The takeaway. So a kitchen tripping the electrics under load is mostly an electrical matter (overloaded circuits or a fault) for a qualified electrician to investigate and fix. The extract fan is one possible contributor - a grease-laden fan draws more current - so keeping it clean removes that factor, but the tripping itself is an electrical issue. So get an electrician to investigate, and keep the extract fan clean so it isn't adding avoidable load. This is general guidance, not electrical advice.
Key points
Mostly an electrical matter
A commercial kitchen that trips the electrics under load - when lots of equipment is running at once - is mostly an electrical matter, and the usual causes are electrical. Overloaded circuits: the most common cause of tripping 'under load' is too much equipment drawing current on a circuit at once, exceeding the circuit's rating - so the protective device (fuse or breaker) trips to protect the circuit. When lots of high-power kitchen equipment runs together, the load can exceed what a circuit is designed for.
An electrical fault: a fault in equipment or wiring (an earth leakage or short) can trip an RCD or breaker - sometimes appearing under load as equipment heats up or draws current. And an inadequate or ageing installation: an electrical installation not sized for the kitchen's load, or ageing, can trip when heavily loaded. So the usual causes are all electrical - overload, fault, or installation - and the tripping is fundamentally an electrical issue. This matters because it means the main answer lies in the electrical domain, not the extraction (though the fan can contribute, covered later). So mostly an electrical matter - overloaded circuits or a fault - is the primary framing: a kitchen tripping under load is largely an electrical problem, needing an electrician (covered next). So the tripping is mainly an electrical issue. This is general guidance, not electrical advice.
Get an electrician
Because tripping under load is an electrical matter - and a potential safety and fire risk - it should be investigated and put right by a qualified electrician. Electrical overloads and faults can be dangerous (overheating, fire risk, shock risk), so a kitchen that repeatedly trips under load shouldn't be left or worked around (for instance, by resetting the trip and carrying on) - it needs proper investigation.
A qualified electrician can identify what's actually happening: whether it's an overload (too much load on a circuit, needing the load redistributed across circuits or the installation upgraded), a fault (in equipment or wiring, needing repair), or an installation issue (inadequate or ageing, needing attention) - and can address it safely and correctly. So the primary action for a kitchen tripping under load is to get an electrician to investigate and fix it - this is where the real cause usually lies and where it must be resolved. The tripping is also a protection working (the trip is protecting the circuit), so it shouldn't be defeated or ignored - it should be understood and the underlying cause fixed. So get an electrician - a safety matter to investigate properly - is the key action: treat the tripping as the electrical safety issue it is, and have it properly investigated. The extraction's role is a secondary factor (covered next). So have a qualified electrician investigate and fix it. This is general guidance, not electrical advice.
Where the fan fits in
Where does the extraction come in? The extract fan is one of the electrical loads in the kitchen, and a grease-laden fan can draw more current than a clean one. The reason: grease loads and unbalances the fan, so its motor has to work harder to turn it - and a harder-working (straining) fan motor can draw more current than an efficient one. In the extreme, a fan seizing or developing a fault from grease can draw excess current or trip its own protection.
So a grease-laden, overworked extract fan adds more to the electrical load than a clean, efficient one would. In a marginal situation - a circuit already near its limit - that extra draw could contribute to tripping (tipping a nearly-overloaded circuit over its rating); or, if the fan itself is drawing too much (a badly grease-laden or faulty fan), the fan's own circuit could trip. So the extraction can be one factor in the electrical load and the tripping - not usually the main cause, but a possible contributor, especially if the fan is heavily grease-laden and straining (as covered in the why-does-an-extractor-fan-keep-tripping and cost-of-an-extract-fan-seized-by-grease pages). So where the fan fits in - a grease-laden fan draws more current - is the extraction's role: it can add avoidable load through being fouled, which keeping it clean removes (covered next). So a fouled fan draws more current, adding to the load. This is general guidance, not electrical advice.
Keeping the fan clean helps
So keeping the extract fan clean (so it runs efficiently, drawing normal current rather than straining) removes that contribution to the electrical load. A clean, efficient fan draws the current it's meant to; a grease-laden, straining one draws more - so cleaning the fan (and the system) brings its current draw back to normal, removing the extra load the grease was adding.
This won't fix a genuine circuit overload or an electrical fault - those are electrical issues for the electrician to resolve (redistributing load, repairing faults, upgrading the installation). But it ensures the extract fan isn't adding avoidable extra load through being grease-laden - removing one factor that could contribute to a marginal circuit tripping. So keeping the fan clean is one helpful thing you can do (alongside the electrical investigation): it makes sure the fan is drawing normal current, not straining and drawing extra. This is a bonus reason to keep the extraction clean (on top of fire safety and airflow): a clean fan is an efficient, normal-current-drawing load, not an inflated one. So keeping the fan clean helps - remove one avoidable factor - is the extraction's practical contribution: clean the fan so it isn't adding avoidable load, while the electrician addresses the main electrical cause. So a clean fan removes one avoidable electrical factor. This is general guidance, not electrical advice.
Keep it in proportion
But keep this in proportion: the extraction is only one possible contributor, and usually a minor one. A kitchen tripping under load is mostly about the electrical circuits and any fault - which is the electrician's domain, not the cleaner's. So don't assume cleaning the fan will fix the tripping; the main answer is an electrical investigation, and the extraction cleaning just removes one avoidable factor.
So the sensible approach is: get a qualified electrician to investigate the tripping (the main and safety-critical action, since the usual cause is an electrical overload or fault); and keep the extract fan clean (so a grease-laden fan isn't adding avoidable load - a helpful secondary measure). Don't rely on cleaning the fan alone to solve a tripping problem - that would risk leaving a genuine electrical overload or fault unaddressed (a real safety risk). And don't ignore the electrical issue while blaming the fan. So the extraction is a minor, avoidable contributor worth removing, but the electrical investigation is the main thing. So keep it in proportion - an electrician first, a clean fan alongside - is the balanced takeaway: treat the tripping as the electrical matter it mainly is (get an electrician), and keep the fan clean as a sensible supporting measure. So investigate the electrics, and keep the fan clean too. This is general guidance, not electrical advice.
Questions
Usually because circuits are overloaded (too much equipment drawing current at once) or there's an electrical fault - an electrical matter for a qualified electrician; a grease-laden extract fan drawing more current can be one contributing factor. A kitchen tripping the electrics under load is mostly an electrical matter, with usual causes being: overloaded circuits (too much equipment drawing current on a circuit at once, exceeding its rating, so the protective device trips - the most common cause of tripping 'under load'); an electrical fault (in equipment or wiring, causing an earth leakage or short that trips an RCD or breaker); or an inadequate or ageing installation (not sized for the load). Because it's an electrical matter and a potential safety and fire risk, it should be investigated by a qualified electrician. One possible contributor from the extraction is the extract fan: a grease-laden fan strains and draws more current than a clean one, which can add to the load (and in a marginal situation contribute to tripping). So the main cause is usually electrical (for an electrician), with a grease-laden fan a possible minor factor. So usually overloaded circuits or a fault; a fouled fan can add to it. So mostly electrical, with the fan a possible part. This is general guidance, not electrical advice.
Yes - repeated tripping under load is an electrical matter and a potential safety and fire risk, so a qualified electrician should investigate (identifying an overload, fault, or installation issue) rather than resetting and carrying on. Yes - if your kitchen keeps tripping the electrics under load, get a qualified electrician to investigate. Tripping under load is an electrical matter and a potential safety and fire risk (electrical overloads and faults can cause overheating, fire, or shock), so it shouldn't be left or worked around by just resetting the trip and carrying on - the trip is a protection working, and the underlying cause needs fixing. A qualified electrician can identify what's happening: whether it's an overload (needing load redistributed across circuits or the installation upgraded), a fault (needing repair), or an installation issue (inadequate or ageing) - and address it safely. This is the primary and safety-critical action. Don't defeat or ignore the tripping, and don't assume it's a minor issue - have it properly investigated. (Keeping the extract fan clean, so a grease-laden fan isn't adding load, is a helpful secondary measure alongside.) So yes - get an electrician to investigate and fix it. So yes; it's a safety matter for an electrician. This is general guidance, not electrical advice.
It can contribute - a grease-laden fan strains and draws more current, which in a marginal situation could tip a nearly-overloaded circuit, or the fan's own circuit could trip; but it's usually a minor factor, not the main cause. A dirty extract fan can contribute to tripping, though it's usually a minor factor rather than the main cause. The extract fan is an electrical load, and a grease-laden fan draws more current than a clean one - because grease loads and unbalances the fan, so its motor works harder (a straining motor draws more current), and in the extreme a fan seizing or developing a fault from grease can draw excess current. So a grease-laden, overworked fan adds more to the electrical load than a clean one. In a marginal situation - a circuit already near its limit - that extra draw could contribute to tripping; or, if the fan draws too much, its own circuit could trip. But this is usually a secondary factor: a kitchen tripping under load is mostly about the electrical circuits and any fault (the electrician's domain). So a dirty fan can add to the problem, but don't assume it's the cause - get an electrician to investigate, and keep the fan clean too. So it can contribute, but is usually minor. So possibly, as a minor factor. This is general guidance, not electrical advice.
Not on its own if the cause is a genuine circuit overload or fault - those need an electrician; cleaning the fan only removes the extra load a grease-laden fan adds, which helps in a marginal case but isn't a substitute for the electrical fix. Cleaning the extract fan won't, on its own, stop your kitchen tripping if the real cause is a genuine circuit overload or electrical fault - those are electrical issues that need a qualified electrician to resolve (redistributing load, repairing faults, upgrading the installation). Cleaning the fan only removes the extra current draw that a grease-laden, straining fan adds - so it helps in a marginal situation (where the extra fan load was tipping a nearly-overloaded circuit) and ensures the fan isn't adding avoidable load, but it isn't a substitute for the electrical investigation and fix. So don't rely on cleaning the fan alone to solve a tripping problem - that could leave a genuine overload or fault unaddressed (a safety risk). The right approach is to get an electrician to investigate and fix the electrical cause, and keep the extract fan clean as a supporting measure (so it isn't adding avoidable load). So cleaning the fan helps but isn't the fix - get an electrician. So not alone; the electrical cause needs an electrician. This is general guidance, not electrical advice.
Because grease loads and unbalances the fan, so its motor has to work harder to turn it - and a harder-working, straining motor draws more current; a badly fouled or seizing fan can draw excess current or develop a fault. A grease-laden fan draws more current because the grease makes the fan harder to turn. Grease builds up on the fan blades and housing, loading the fan and unbalancing it - so the fan motor has to work harder to spin it against that extra weight, imbalance, and (in the wider system) the increased airflow resistance. A harder-working, straining motor draws more current than one running freely and efficiently. In the extreme, a fan heavily fouled or seizing with grease can draw excess current, overheat, or develop a fault - and may trip its own protection (as covered in the cost-of-an-extract-fan-seized-by-grease page). So the dirtier and more strained the fan, the more current it draws. This is why keeping the fan clean matters for its current draw (as well as its airflow and fire safety): a clean fan runs efficiently on normal current, while a grease-laden one draws more. So because grease makes the fan strain, so the motor draws more current. So the loaded, straining motor draws more. This is general guidance, not electrical advice.
Get a qualified electrician to investigate and fix the electrical cause (the main action), and keep the extract fan clean so a grease-laden fan isn't adding avoidable load - the electrician first, the clean fan alongside. For a kitchen that trips the electrics under load, take two steps, in proportion. First and mainly: get a qualified electrician to investigate the tripping - because the usual cause is an electrical overload or fault, which is a safety matter needing proper investigation and fixing (redistributing load, repairing a fault, or addressing the installation). Don't just reset the trip and carry on, and don't assume it's minor. Second, as a supporting measure: keep the extract fan clean (to the TR19 Grease standard), so a grease-laden, straining fan isn't adding avoidable extra current draw to the load - removing one possible contributing factor. So the electrician is the primary action (the main cause is usually electrical), and keeping the fan clean is a sensible secondary measure (removing the extraction's possible contribution). Don't rely on cleaning the fan alone to fix the tripping - the electrical cause must be addressed. So get an electrician to investigate, and keep the fan clean too. So an electrician first, a clean fan alongside. This is general guidance, not electrical advice.
A grease-laden extract fan draws more current, adding avoidable load; we clean the whole system to TR19 Grease so the fan runs efficiently on normal current - removing one factor in electrical tripping, while an electrician addresses the circuits themselves. Ask us to keep your extract fan clean and efficient. This is general guidance, not electrical advice.
