Electrical Engineering Design
Safe, Reliable, Resilient
Power You Can Trust
Behind those three words is disciplined engineering. We design electrical systems that keep people safe — code-compliant power, lighting, and life-safety that run reliably from the service entrance to the last receptacle.
They’re designed for resilience under load, with redundancy and standby power where code or the agreed scope requires it. Every set is load-calculated, trade-coordinated, and QA-reviewed, then delivered as clean, permit-ready documents for your engineer of record to review, seal, and issue.
Power Distribution Design
From the incoming utility service to the final branch circuit, CoreX designs complete power distribution systems that are properly sized, documented in accordance with the NEC and local amendments, and integrated with the mechanical and plumbing disciplines to minimize field conflicts.
- Building power system design and capacity planning (low- and medium-voltage)
- Existing service available capacity assessment
- Service and feeder load calculations and demand analysis per NEC Article 220 (Article 120 in the 2026 NEC)
- Single-line diagrams — power and grounding
- Grounding system design
- Feeder and branch circuit sizing
- Electrical equipment sizing and specifications — service entrance, switchgear, distribution boards, transformers & panels
- Sub-metering and energy-monitoring system design
- Dry utility coordination for new service
- Electrical room layout
Lighting Design
Great lighting is felt, not noticed. CoreX designs interior and exterior systems that hit IES illumination levels, satisfy energy and dark-sky codes, and keep energy use low — balancing comfort, aesthetics, and performance across every space.
- Interior and exterior lighting layout design
- Photometric analysis
- Lighting fixture selection and schedule
- Lighting controls
- Energy code compliance (IECC / California Title 24)
- Light pollution and dark sky compliance
- Existing lighting retrofit and LED conversion design
Utility Coordination & Submittal
Once the design is set, CoreX prepares the utility-facing package — sizing service equipment to real product data, and packaging load documentation the utility needs to review and approve service.
- Utility application & load documentation preparation
- Service-entrance equipment coordination
- Primary vs. secondary service evaluation
- Load-letter preparation and utility submittal support
- Service-entrance sizing and metering layout
Building & Life Safety
Protecting both the building and the people inside it, CoreX designs the systems that respond when something goes wrong — lightning and surge protection for the structure and equipment, and fire alarm and emergency egress lighting documented to NFPA 72, NFPA 101, and the IBC for safe, code-compliant evacuation.
- Fire alarm system design & device layout per NFPA 72 and IBC 907
- Egress, emergency & exit lighting (IBC Chapter 10 or NFPA 101, as adopted)
- Lightning protection system design (NFPA 780, UL 96A)
Power System Studies
When a fault hits, lives are on the line — not just gear. CoreX delivers power system studies — load flow, short-circuit, selective coordination, and arc-flash (incident energy calculated per IEEE 1584, with labeling and PPE selection per NFPA 70E) — modeled in SKM Power Tools for Windows or ETAP to protect personnel, verify equipment duty, and keep distribution selective and safe, on greenfield and brownfield projects (brownfield studies depend on client-supplied existing-equipment and utility fault-current data).
- Arc-flash analysis (NFPA 70E, IEEE 1584)
- Short-circuit studies
- Protective device / selective coordination
- Load flow studies
- Equipment duty evaluation
- Motor starting analysis (for projects with large motor loads)
Emergency & Standby Power
When normal power fails, critical systems still have to keep running. CoreX designs emergency and standby power — generators, ATS, inverters, and UPS — engineered to NEC 700/701/702 so the right loads stay energized when it matters most.
- Emergency and standby power distribution design
- Emergency, legally required, and optional standby system design (NEC 700, 701 & 702)
- Backup power equipment sizing and specifications — generator, ATS, inverter & UPS
- Critical load analysis and backup power planning
EV & Solar-Ready Infrastructure
CoreX engineers EV charging infrastructure and solar-ready electrical provisions that prepare buildings for an electrified future — sizing service and distribution for added load, managing demand, and reserving the capacity and pathways renewables need, to help reduce rework later.
- EV charging infrastructure (Level 2 & DC fast charging) — NEC 625
- Solar-ready provisions: reserved zones, capacity & pathways per applicable solar-ready provisions in the adopted IECC or IgCC edition and the agreed project scope; interconnection points per NEC 705 (PV system per NEC 690) when PV is designed
- Panel capacity sizing for EV loads and solar-ready capacity
- Load management, demand control & metering
- Conduit pathways & stub-outs for future expansion
Independent Review & Construction Support
Beyond design, CoreX brings independent review and construction-phase support to your projects — peer review of electrical documents, plan review support for city projects, and construction administration support that helps keep designs accurate, code-compliant, and buildable from permit through construction.
- Peer review of electrical design documents
- Plan review support for city projects
- Code compliance and constructability review
- Construction administration support (RFIs, submittals & shop-drawing review)
- Value engineering & cost-reduction review
- Plan-check comment responses and resubmittal sets, prepared for your engineer of record to issue
For municipal plan-review work, CoreX supports a jurisdiction-authorized reviewer holding the required credential — such as an ICC-certified Electrical Plans Examiner or a licensed PE — who issues the official determination.
We engineer electrical systems across every sector we serve — commercial and office, healthcare and medical, residential and multi-family, education and institutional, industrial and manufacturing, data centers and mission-critical, laboratories, automotive and EV sites, hospitality and hotels, restaurants and food service, retail and mixed-use, and government and public facilities — on new construction, renovations, tenant improvements, and infrastructure upgrades across a wide range of scales.
Yes. Many of our clients are consulting firms and architects who bring us in for overflow or full-scope electrical work. We produce to your templates, title blocks, and standards so the set reads as your own, and we coordinate directly with your project leads throughout.
Power plans, lighting plans, photometric calculations, panel schedules, single-line and riser diagrams, load calculations, fixture schedules, detail drawings and notes, and manufacturer cut sheets for the project’s specified fixtures — coordinated with mechanical and plumbing trades and the serving utility, and delivered in your CAD or Revit standards as a set ready for your engineer of record's review, seal, and permit submission.
Yes. We produce photometric calculations in AGi32 and Visual Lighting, select fixtures to meet IES illumination levels, and design code-compliant lighting controls — occupancy sensors, daylighting, and dimming — per IECC and local energy codes.
Yes. We design generator and automatic transfer switch systems, emergency and standby distribution per NEC 700/701/702, egress and exit lighting per NEC 700 and IBC Chapter 10 or NFPA 101, as adopted, and fire alarm system design and device layout per NFPA 72 and IBC 907 — coordinated with your AHJ’s specific requirements.
Yes. We deliver building power system studies — load flow, short-circuit, selective coordination, and arc-flash analysis in SKM Power Tools for Windows or ETAP — for both greenfield and brownfield projects. For brownfield work, the client or project team provides the required existing-site data, including equipment ratings, circuit-breaker ratings, feeder and conductor details, utility fault current, and as-installed conditions, so we can model the system accurately and deliver a documented, code-compliant study.
Yes. We design EV charging infrastructure — service and panel capacity, branch circuits, load management, and conduit pathways for Level 2 and DC fast charging — and we engineer solar-ready provisions such as reserved panel space, interconnection points, and conduit rough-ins, positioning the building for future PV while helping reduce rework.
We design to the NEC (NFPA 70) along with NFPA 72, NFPA 101, IBC, and IECC, and we adapt to the amendments and energy codes — including Title 24 — of the specific state and AHJ your project falls under.
Electrical never stands alone. We coordinate the electrical design with mechanical, plumbing, and structural systems, identifying conflicts in equipment placement, conduit routing, and connected loads while the design is still on screen — helping reduce coordination-related field RFIs.
A project kickoff usually comes down to four things: the architectural backgrounds (CAD or Revit), the building program and the code edition in force, the utility service or available capacity, and connected-load data from the mechanical and plumbing scope. With those in hand up front, we move quickly and with fewer assumptions to revisit later. We reply within one business day.
CoreX works as a design support partner: we produce the complete calculations and construction documents, and the licensed engineer of record for your project reviews and seals the final set. Responsible charge stays with your engineer of record while we carry the production load.
Yes — we respond to electrical RFIs, review submittals and shop drawings against the design intent, and prepare clarification sketches and revisions for your engineer of record to issue as construction progresses.