Electrical infrastructure visibility starts with a simple test.
Most engineering teams can produce a folder of electrical records within about ten minutes: inspection reports, service sheets, thermographic surveys, energy data, a fault log going back years.
Having electrical records is not the same as having visibility of electrical asset condition.
The difference shows up when someone asks a direct question about a critical asset and the honest answer is we’d have to look into it. That is rarely carelessness. The answer sits across four systems, two contractors and a period nobody was measuring.
Below are seven questions worth putting to your own site. They are the ones that tend to separate a site with records from a site that knows where its risk is.
1. Asset age and design life: how old is your critical switchgear?
Age alone doesn’t condemn an asset. But it changes what you should be watching.
The HSE’s guidance on switchgear safety notes that manufacturers typically quote a 20-year design life for vacuum switchgear, while adding, pointedly, that “vacuum equipment of this age and older can be found in use.” Its position is that owners should not assume past reliability will continue indefinitely, and should have a strategy for the point at which equipment reaches the limit of its design life.
That is a regulator saying that a good failure history is not evidence of a good future.
If you can’t name the age of your main incoming switchgear, transformers and principal LV boards, that is the first gap.
2. Asset Loading: do you know how hard those assets are working?
Nameplate ratings assume conditions your switch room may not provide.
Schneider Electric’s maintenance data for LV air circuit breakers gives a worked example:
A 100 A device at 80% load has a service life of roughly 30 years at an average ambient of 25 °C, but around 25 years at 45 °C. A 10 °C rise in ambient temperature cuts component service life by approximately half. Duty cycling compounds it. The same device rated for 10,000 operations lasts about 27 years at one cycle a day and about seven years at four.
So “it’s a 30-year asset” is only true under conditions somebody has verified. A hot, dusty, heavily switched panel is consuming its design life several times faster than the nameplate implies, and nothing in a periodic inspection report will tell you that.
3. Condition Trends: is asset condition changing, or just currently acceptable?
An inspection tells you a state. It doesn’t tell you a direction.
Two switchboards can both pass a survey while one is stable and the other is midway through a two-year decline. Only repeated, comparable measurement distinguishes them and by the time a difference is obvious to a visual inspection, the useful warning period has usually gone.
4. Fault History: was that fault isolated, or the fourth one this quarter?
This is the question most sites answer badly, because fault history tends to be distributed across shift logs, contractor reports, CMMS tickets and individual memory.
A breaker that operated once is a maintenance task. The same breaker operating four times in five months, always during a particular production changeover, is a different problem with a different cause and a different fix.
If establishing which of those you have takes a week of digging, the pattern will keep being missed.
5. Power Quality: do you know what your incoming supply is doing?
Most sites have far more data about production equipment than about the power feeding it.
There’s a structural reason this blind spot persists. GB electricity supply reliability is reported through CI and CML indices, and a peer-reviewed IET review of the GB distribution system points out that these only count interruptions longer than three minutes. Every voltage dip, transient and momentary interruption sits below that threshold and outside the headline reliability figures your DNO reports. Those are the events that trip drives, reset PLCs and drop contactors.
Those figures aren’t wrong. They just don’t measure the thing that stops your plant.
6. Fault Location: can you prove a problem is upstream of your meter?
When a UPS repeatedly alarms or a drive keeps tripping, the immediate question is whether the cause sits in the equipment, in your distribution, or beyond the meter.
Without recorded evidence at the right point, that discussion becomes an exchange of opinions, usually with a supplier who has no reason to concede the point. With time-stamped data on both sides of the boundary, it becomes a short conversation.
7. Investment Evidence: what would justify replacing an asset next quarter?
Not what you believe. What you could put in front of a finance director.
Isolated alarms, a fault log and engineering judgement are a weak case, particularly against competing capital bids with clearer numbers. Condition trends, event history and a documented deterioration rate are a strong one.
If the answer is they’d probably take my word for it, the case is more fragile than it looks, and it usually surfaces at the worst moment, when the request is urgent.
What electrical infrastructure visibility actually requires
More data answers none of them. Continuity and correlation do: measurement that persists between inspections, and the ability to see how load, supply quality, temperature and asset condition relate to one another.
That correlation is where most of the value sits. A nuisance trip examined alone is a nuisance trip. Examined alongside a voltage dip on the incoming supply, a rising load profile and harmonic distortion on the same board, it becomes a diagnosable problem with a named cause.
Research cited by IDC found that around 70% of facilities now operate with complex electrical systems. That is the condition under which single-point measurement stops being sufficient. Add solar PV, battery storage, EV charging and new automation to a distribution system designed for none of them, and the interactions between assets matter more than any individual reading.
It’s why we look at the system rather than the device.
Where to start with electrical asset monitoring
You don’t need to monitor everything. You need to answer these questions for the assets whose failure would stop the site. For most sites that’s a short list: the incoming supply, main switchgear, transformers, the boards feeding critical process, and UPS systems.
If you couldn’t answer four or more of the seven questions above with evidence rather than judgement, the visibility gap is worth closing before it selects its own timing.
See what continuous asset monitoring reveals on a live site
Acteniq is an engineering-led asset and energy intelligence business. We assess critical electrical infrastructure, monitor the assets that matter, interpret what the data shows and deliver the remedial work, maintenance or monitoring that follows. Work with engineers, not an account team.
Sources cited in this piece
- HSE, Keeping electrical switchgear safe, HSG230 2nd edition, 2015, para 116–117
- Schneider Electric, Masterpact NT and NW Maintenance Guide, LVPED508016EN-02, 07/2013
- Vegunta, Watts, Milanović, Djokic & Higginson, “Review of GB Electricity Distribution System’s Electricity Security of Supply, Reliability and Power Quality”, IET Generation, Transmission & Distribution, 2019
- IDC, Maximize Business and Operation Resiliency through Services
