In a facility where power paths, people, and infrastructure are constantly changing, workers may encounter energized equipment where they didn’t expect it.
A worker approaches a conductor that was not expected to be energized. Maybe a panel was mislabeled. Maybe a redundant power path was not accounted for. Or maybe equipment believed to be de-energized was still receiving power from somewhere else in the system.
These situations are not unique to data centers, but the pace and complexity of today's data center buildout can create more opportunities for a gap between what someone expects to be energized and what actually is. That is where wearable voltage detection in a data center serves a different purpose than a presence/absence of voltage test performed at a single point in time. Instead of verifying one piece of equipment at one moment, a wearable adds continuous electrical awareness while a worker moves through the job.
The data center industry is moving quickly. According to JLL's 2026 North America Data Center Report, North American data center demand reached a record 25 GW of absorption during the first half of 2026, while 66 GW of capacity was under construction. That pressure to bring capacity online is one reason the industry continues turning to prefabricated and modular infrastructure to help compress deployment timelines.
Faster construction does not mean safety steps or commissioning procedures are automatically being skipped. It does mean equipment can be installed, modified, commissioned, and energized quickly, creating more opportunity for documentation or an individual's understanding of the facility to lag behind what is actually in place.
Then there is the power architecture itself. Data centers are designed around availability, which can mean multiple power paths through 2N, block-redundant, and catcher UPS configurations. Redundancy supports uptime, but it can also make understanding electrical state more complex when multiple possible sources need to be accounted for.
The workforce can add another variable. Contractors, vendors, and commissioning teams may move through a facility as construction and expansion progress without having the same familiarity with its specific one-line diagrams and operating history as long-tenured facility personnel. As we discussed in Where the Data Center Boom Could Strain the Skilled Trades, rapid data center growth is also increasing demand for the skilled workers needed to build and maintain these facilities.
The common thread is not that fast-moving data centers are inherently unsafe. It is that as a facility is built, expanded, and reconfigured, electrical conditions can change quickly, and what a worker expects to be de-energized may not always match what is actually energized.
A wearable voltage detector adds another source of information directly at the worker level. Proxxi by Grace is worn on the wrist and detects the AC electric fields produced by energized equipment. As a worker approaches an energized source, the device alerts them through haptic vibrations, audible beeps, and visual LED flashes. Proxxi has an AC voltage detection range of 110V to 500kV, with a default 480V setting that can be configured through its companion app for industrial applications.
The important distinction is when that information is available.
Absence-of-voltage testing is an active step performed at a specific point in the LOTO process. A qualified person follows established procedures and uses an appropriately rated test instrument to verify the electrical state before work begins. That remains an essential part of the process.
Proxxi by Grace serves a different purpose. Because it is worn on the person, it provides passive, continuous awareness of AC electric fields as a worker moves through the job. If they approach an energized source they did not expect to encounter, the Proxxi band can alert them to its presence.
It does not establish an electrically safe work condition or replace lockout/tagout, PPE, training, or established electrical safety procedures. It adds another layer of awareness for situations where what is actually energized may not match what someone expected.
For a deeper look at the technology, read How Does Wearable Voltage Detection Work?.
Wearable voltage detection makes more sense when it is viewed as one part of a layered data center safety program rather than as a standalone solution.
ChekVolt® and Permanent Electrical Safety Devices (PESDs) support presence and/or absence of voltage verification before work begins. They provide workers with voltage presence information from outside the enclosure as part of an established verification process.
Continuous Thermal Monitoring (CTM) provides ongoing visibility into equipment condition, helping teams identify developing thermal issues between inspection intervals.
Proxxi by Grace adds continuous personal awareness during the work itself. It moves with the worker rather than remaining attached to a particular piece of equipment, providing alerts when AC electric fields are detected in the surrounding work environment.
Each layer answers a different question: What is the electrical state before I begin? What is happening inside the equipment over time? What might I encounter as I move through the work?
No single technology answers all three. In a data center where infrastructure density, redundant power paths, expansion activity, and data center contractor safety can all intersect, those layers can support the procedures, training, PPE, and qualified personnel already at the center of the electrical safety program.
Consider a contractor pulling cable near an energized busway. The contractor may not be working directly on the busway, but a wearable voltage detector can provide an alert if their work brings them unexpectedly closer to energized equipment.
Or consider a vendor brought into an operating facility for a specialized task. They may be qualified for the work without having years of familiarity with that particular facility's redundant power topology. Proxxi does not replace the one-line diagram, job briefing, or required verification procedures, but it adds another source of awareness as that person moves through the environment.
The same principle can apply during overnight maintenance or work performed with fewer people nearby. Procedures do not change because staffing is reduced, but continuous personal awareness can provide another layer of information if an unexpected energized source is encountered.
Data center electrical environments are constantly evolving, but the goal remains the same: giving workers the information they need to recognize when something does not match expectations. Wearable voltage detection adds another layer of awareness that stays with the worker as they move through the job.
Want to explore where wearable voltage detection could fit into your data center safety program?
Learn more about Proxxi by Grace and talk with our team about adding continuous electrical awareness to your existing safety program.
To safer, smarter operations,