Commercial EV charging infrastructure is being deployed faster than the electrical safety frameworks to support it. Organizations across every sector — corporate campuses, retail centers, logistics hubs, healthcare facilities — are adding Level 2 and DC fast chargers to meet employee expectations, sustainability goals, and regulatory requirements. Most are doing so without asking the questions that matter most from an electrical safety standpoint. Here are the questions every facility should be asking before the chargers go in.
Does Your Existing Electrical System Support the Additional Load?
EV charging significantly increases the electrical load on your distribution system. A single Level 2 charger draws 7–19 kW continuously. A DC fast charger can draw 50–350 kW. Adding multiple chargers without a load study can push transformers, feeders, and panels beyond their rated capacity — creating overheating, protective device nuisance tripping, and in extreme cases, fire risk.
Before any EV charging installation, a load study and power distribution analysis should confirm available capacity, identify required upgrades, and validate that protective devices are properly coordinated for the new load profile.
Has Your Arc Flash Study Been Updated?
Adding EV charging infrastructure typically requires modifications to your electrical distribution system — new panelboards, feeders, service entrance changes, or transformer upgrades. Each of these modifications can change the fault current and protective device configuration of your system. Under NFPA 70E Article 130.5, a major modification to the electrical system triggers a mandatory arc flash study update. Facilities that add EV infrastructure without updating their arc flash study are operating with inaccurate hazard data.
What Are the Grounding and GFCI Requirements?
NEC Article 625, which governs EV charging system installations, includes specific requirements for grounding, ground fault protection, and overcurrent protection. GFCI protection is required for personnel protection at EV charging equipment in commercial applications. These requirements must be addressed in the installation design — not retrofitted after the fact.
Who Is Qualified to Maintain EV Charging Infrastructure?
EV charging systems combine electrical distribution infrastructure with embedded communications, network connectivity, and proprietary control systems. Maintenance requires personnel qualified in both the electrical distribution elements (covered by NFPA 70E and 70B) and the EV-specific components. Facilities should establish maintenance protocols for charging equipment before deployment, not after the first failure.
How Bowtie Supports EV Infrastructure Projects
Bowtie Engineering’s EV Systems team supports the full lifecycle of commercial EV charging infrastructure — from initial load and power distribution analysis through installation evaluation, arc flash study updates, and ongoing maintenance program integration.Explore Bowtie’s EV Systems services for commercial and industrial EV infrastructure support. Ready to plan your installation? Contact our team today.
Frequently Asked Questions
Does adding EV charging stations require an electrical load study?
Yes. A single Level 2 charger draws 7–19 kW continuously, and a DC fast charger can draw 50–350 kW. Adding multiple chargers without a load study risks pushing transformers, feeders, and panels beyond their rated capacity, leading to overheating, nuisance tripping of protective devices, and in serious cases, fire risk. A load study and power distribution analysis should be completed before any EV charging installation.
Do EV charging installations trigger an arc flash study update?
In most cases, yes. Adding EV charging infrastructure typically requires modifications to the electrical distribution system — new panelboards, feeders, service entrance changes, or transformer upgrades. Under NFPA 70E Article 130.5, any major modification to the electrical system requires an arc flash study update. Facilities that skip this step are operating with hazard data that no longer reflects their actual system.
What are the NEC requirements for EV charging installations in commercial buildings?
NEC Article 625 governs commercial EV charging system installations and includes specific requirements for grounding, ground fault protection, and overcurrent protection. GFCI protection is required for personnel protection at EV charging equipment in commercial applications. These requirements must be addressed in the installation design rather than retrofitted after commissioning.
What qualifications are needed to maintain commercial EV charging infrastructure?
EV charging systems combine electrical distribution infrastructure with embedded communications, network connectivity, and proprietary control systems. Maintenance personnel need to be qualified in both the electrical distribution elements — covered under NFPA 70E and NFPA 70B — and the EV-specific components. Maintenance protocols should be established before deployment, not after the first equipment failure.
Can existing commercial electrical infrastructure support DC fast chargers?
Not always, and often not without upgrades. DC fast chargers can draw 50–350 kW each, which represents a substantial continuous load. Whether existing infrastructure can support this depends on available transformer capacity, feeder ratings, protective device coordination, and utility service capacity. A professional load study and power distribution analysis is the only reliable way to determine what is feasible and what upgrades are required.
Why is EV charging infrastructure being deployed faster than electrical safety frameworks can support it?
Commercial EV adoption is being driven by employee expectations, sustainability commitments, and regulatory requirements — all of which are moving quickly. Electrical safety standards, by contrast, are updated on defined cycles and the engineering expertise required to apply them correctly takes time to scale. The result is that many installations are proceeding without the load studies, arc flash updates, and maintenance planning that good electrical safety practice requires.
What happens if EV charging infrastructure is installed without updating the arc flash study?
Workers servicing the modified electrical distribution system will be working from hazard labels and PPE guidance that no longer reflect actual fault current levels and incident energy values. This means PPE selections may be inadequate for the actual hazard, and arc flash boundaries shown on existing labels may be incorrect. This is a direct safety risk to maintenance personnel and a compliance violation under NFPA 70E.