The equipment usually arrives on schedule. The electrical work is what quietly eats the timeline, because nobody opens the panels until the project is already moving. Planning around electrical automation solutions from day one is the difference between a retrofit that stays on track and one that stalls while everyone argues about who forgot the power. Here are the problems that show up most often, and what to do about them.
Existing Panels Weren’t Built for This Load
Most older warehouses were wired for lighting, dock doors, and a few chargers. Conveyors, sortation, robotics charging, and controls cabinets can double or triple the demand, and the original service often can’t carry it.
Don’t trust nameplate ratings or old single-line diagrams on their own. A proper load study, with actual measurements over a few weeks, shows how much capacity truly exists and when your peaks happen.
If the numbers fall short, expect a service upgrade, new switchgear, or a transformer change. These items have long lead times and utility involvement, so finding out in month six instead of month one can push your go-live by a quarter. Ask the utility early too, since many will want load calculations and a formal request before they commit to a date for any upgrade.
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Nobody Has Accurate Drawings
Buildings change over decades. Circuits get added, panels get relabeled, and some modifications never make it into the documentation, so the drawings you’re handed may describe a building that no longer exists.
That gap creates real risk. A crew that assumes a circuit is spare, or that a feed comes from one panel when it comes from another, can trip critical loads or create safety hazards.
Budget for a field verification before design is finalized. Walking the building, tracing feeders, and confirming panel schedules feels slow, but it’s far cheaper than redesigning after installers find surprises behind the walls. Photograph every panel interior and confirm which breakers are truly spare, because guessing about spares is how unplanned outages happen.
Power Quality Problems Show Up After Installation
Older facilities often have voltage dips, harmonics, or grounding issues that nobody noticed because forklifts and lights don’t care. PLCs, drives, scanners, and robotics controllers care a great deal.
The symptoms look like equipment faults. A sorter that randomly stops, a scanner that misreads, or a robot that reboots mid-shift often points to power quality rather than the machine itself, and chasing it as a mechanical issue wastes weeks. Heat is a related culprit, since panels packed with drives and power supplies in an unventilated room can run hot enough to shorten equipment life and trigger nuisance faults.
Test power quality before installation and again during commissioning. Adding line reactors, filters, or better grounding at the start costs little compared with troubleshooting intermittent faults while the system is live. A commercial general contractor that coordinates electrical and controls work can schedule these tests before equipment is released for shipment.
Controls and Network Infrastructure Get Underestimated
Modern automation depends on a stable network as much as on power. Conveyors, sensors, cameras, and robots all communicate constantly, and many retrofits discover that the existing cabling and wireless coverage can’t handle the traffic.
Dead spots in wireless coverage are especially common in racking aisles, where steel blocks signals. Fiber backbones, industrial switches, and properly designed Wi-Fi or private wireless networks need to be part of the budget rather than an afterthought.
This is where a controls company earns its keep. Someone has to decide how safety circuits, PLC networks, and warehouse software talk to each other, and when that responsibility is split across vendors, the gaps tend to appear at the worst possible time. Cybersecurity belongs in this conversation too, because connecting automation equipment to a corporate network without segmentation opens risks your IT team will want a say in.
Working Around a Live Operation Is Harder Than Working in a Shell
Retrofits happen in buildings that are still shipping orders. Electricians can’t simply shut down a main panel for a day, and planned outages need to be scheduled around customer cutoffs and peak seasons.
That means phasing, temporary power, and careful sequencing. A good plan identifies which shutdowns are unavoidable, how long each will last, and what fallback exists if work runs long. Temporary power for conveyors and lighting during phased cutovers needs its own planning, since rental generators and temporary panels add costs that are easy to forget.
Many facilities choose a single general contractor to coordinate the electrical work with structural changes, dock modifications, and equipment installation. One team managing the schedule means fewer conflicts between trades who each assume their work goes first.
Code Requirements and Permits Take Longer Than Expected
Adding automation can trigger code upgrades you didn’t plan for. Arc flash studies, updated labeling, emergency stop circuits, and fire alarm integration are common examples, and inspectors may want them brought up to current standards when significant electrical work is done.
Permit timelines vary a lot between jurisdictions. Utility work, especially anything involving a new service or transformer, can take months, and nothing you do on site will speed it up.
Ask the authority having jurisdiction for a pre-submission meeting, because a short conversation can prevent a rejected drawing set and a month of delay. Start these conversations early and assume the schedule will stretch. It’s much better to be pleasantly surprised than to promise a go-live date that depends on an approval you don’t control.
One Accountable Party Beats Three Finger-Pointers
The most common retrofit failure isn’t technical. It’s three vendors each delivering their own scope, with nobody responsible for how the pieces fit together.
A warehouse automation systems integrator or an electrical systems company with real controls experience can own the whole chain, from power distribution through controls to commissioning. That matters most when something doesn’t work on startup day and you need an answer instead of a debate.
If you’re planning a retrofit and want an honest review of what your electrical infrastructure can support, contact us before you finalize equipment orders. A short assessment now often reveals problems that would otherwise cost months later.
Commissioning Is Where Electrical Problems Finally Surface
Even well-planned retrofits find issues during testing. Interlocks that don’t behave as drawn, sensors wired to the wrong input, and emergency stop zones that don’t match the layout all tend to appear during commissioning.
Allow real time for this phase and resist pressure to compress it. Rushing a go-live to hit a date usually means finishing commissioning with live product on the line, which is the most expensive way to find problems. Keep a punch list with an owner and a date on every item, since open items that linger after go-live have a way of becoming permanent.
