The equipment order is placed, the lease is signed, and the production timeline is set. Then someone pulls the panel schedule and the numbers don’t add up. What looks like a straightforward expansion suddenly has a bottleneck that has nothing to do with the new machinery, the automation system, or the EV fleet: it’s the building’s electrical capacity, and it can’t keep up with where the operation is going.
It’s a situation we’ve been solving for Southern California facilities since Evan Malm founded Southwest Industrial Electric in 1988. The problem isn’t unique to one industry. We see it in aerospace facilities in the South Bay, distribution centers adding conveyor automation, and media studios upgrading production infrastructure. The electrical system gets inherited, not chosen, and by the time growth makes the shortfall obvious, the schedule is already under pressure.
The good news is that electrical capacity planning works when it starts early. Here’s how growing Los Angeles facilities can get ahead of it.
Why Electrical Demand Sneaks Up on Growing Facilities
Electrical load rarely jumps all at once. It accumulates. A new compressor here, an additional production line there, a charging station for a few delivery vans. Each addition makes sense in isolation and gets connected without much fanfare. But the infrastructure underneath those additions was engineered for an earlier version of the operation, often years or decades ago.
Right now, that accumulation is happening fast across Los Angeles. Aerospace and defense leasing in Greater Los Angeles during the first half of 2026 was 30 percent higher than all of 2025 and more than 140 percent above full-year 2024 levels, according to CBRE data. The South Bay, including Torrance and El Segundo, has seen significant new lease activity from aerospace, defense, and advanced manufacturing tenants. These aren’t tenants who move in and leave things as they are. They bring high-demand equipment, precision manufacturing processes, and power requirements the existing building infrastructure often wasn’t designed to support.
Distribution and logistics operators are facing a similar shift. Warehouses that once ran entirely on manual labor are adding autonomous mobile robots, conveyor systems, and automated storage and retrieval systems. These systems draw more continuous power than the people they’re replacing, and they do it in load profiles the original electrical design never anticipated.
What a Load Assessment Reveals Before You Expand
Before any design work begins, we need to understand what the electrical system is actually doing versus what it’s rated to do. Those two numbers are rarely the same.
A proper load assessment compares measured demand against the rated capacity of the panel, switchgear, and service entrance. The best source of measured demand is interval metering data, which captures actual consumption in 15- or 30-minute intervals over time rather than relying on nameplate load figures that assume every device runs at full draw simultaneously. Nameplate calculations consistently overstate demand, which can obscure how little headroom actually remains.
Two engineering thresholds are worth knowing when reviewing the results:
- Spare capacity target: Systems designed with roughly 20 to 30 percent spare capacity allow future equipment to be added without rebuilding the switchgear from scratch.
- Transformer loading signal: Transformers operating at 75 to 80 percent of rated capacity are commonly treated as the point to begin planning the next upgrade, not after problems start appearing.
A load assessment also produces or validates a one-line electrical diagram, a simplified schematic showing how power flows through the facility from the utility service entrance through the distribution system to individual circuits. This document is essential for any meaningful capacity planning and is also a required submission to LADWP when a large-service upgrade is involved. We also conduct arc-flash studies as part of comprehensive assessments, since arc-flash hazard analysis (an evaluation of the energy a fault could release at each point in the electrical system) is required under NFPA 70E and directly informs how the upgraded system needs to be engineered and labeled.
Coordinating with LADWP on Service Capacity
This is where many facility managers discover that “getting more power” isn’t just a contractor conversation. The Los Angeles Department of Water and Power runs its own separate review process, on its own timeline, and it needs to be in motion well before construction starts.
LADWP draws a clear line between small and large commercial services. Any service rated 400 amps or less, single-phase, is handled as a small service through an Electric Service Representative. Any service over 400 amps, or any three-phase service regardless of amperage, is classified as a large service, which requires a Service Planning Engineer to review full electrical plans along with the one-line diagram. Most growing industrial and heavy commercial facilities in Los Angeles fall into the large-service category.
For large commercial and industrial services, LADWP typically provides the service design and issues a Commitment Letter in approximately 6 to 12 weeks after plans are submitted. Projects requiring a custom transformer station can take 4 to 6 months. That timeline runs from submission, not from the day you decide to start the process. If equipment is scheduled to arrive in four months and the utility review hasn’t started, the math doesn’t work.
There’s also a parallel track that catches some clients off guard. Before a new or upgraded service can be energized, your licensed electrician must obtain all relevant permits and final electrical approval from the Los Angeles Department of Building and Safety (LADBS), while LADWP completes its own review and meter installation. Utility-side approval and city permitting don’t run in sequence; they need to move together. A contractor familiar with LADWP’s process can submit the right documentation at the right time and keep both tracks moving without one waiting on the other.
Engineering Electrical Systems That Have Room to Grow
An expansion-ready electrical system isn’t just one that handles today’s load. It’s one designed so that tomorrow’s additions don’t trigger another full redesign. Several design choices make future capacity additions straightforward rather than disruptive.
- Spare breaker positions: Leaving open positions in panelboards means new circuits can be added without replacing the panel itself.
- Oversized conduit runs: Installing conduit sized for more conductors than currently needed allows additional circuits to be pulled through existing pathways later.
- Modular switchgear sections: Switchgear designed with expansion sections means new distribution equipment can be added to the lineup without de-energizing and rebuilding the entire system.
- Phased load planning: For distribution centers adding automation in stages, the switchgear needs to be engineered for the final conveyor or robotics configuration, not just the first phase, so each addition connects to infrastructure that was already designed for it.
Our in-house electrical design and engineering department brings more than 40 years of field experience to projects like these. We don’t just execute a plan handed to us; we engineer the solution from the start, with NEC Article 220 demand load calculations guiding the design and compliance requirements built in from day one. Our work in distribution center electrical systems, including conveyor controls, automated systems, and high-demand power distribution, gives us a practical understanding of how phased rollouts actually unfold on a facility floor.
Why Electrical Capacity Planning Can’t Wait
Facilities that treat electrical capacity as part of the expansion conversation from the beginning avoid the scenario described at the top of this post: equipment arriving before the infrastructure is ready to support it. The LADWP timeline alone makes the case. A 6-to-12-week review period for a large-service submission means that even if the utility process starts the same week a lease is signed, it may still be the longest lead-time item on the project schedule.
Starting earlier isn’t just about avoiding delays. It’s about having options. A facility manager who discovers a capacity shortfall six months before a planned expansion can choose between a full service upgrade, a phased approach that extends the current infrastructure, or a redesign of the equipment rollout sequence. The same manager who discovers the shortfall two weeks before equipment delivery has almost none of those choices.
The industrial facilities best positioned for growth in Los Angeles right now are the ones building electrical capacity planning into the earliest stages of any expansion. Southwest Industrial Electric offers free estimates for commercial and industrial electrical projects and can walk through a capacity assessment with your team as a first step. Reach us at (323) 215-1273.