Arc Flash Studies

Arc Flash & Power System Studies

We provide detailed power system analysis services to help clients improve electrical safety, maintain regulatory compliance (OSHA 29 CFR 1910.333, OSHA 1910.269, & NFPA 70E), and enhance the reliability of their electrical infrastructure. Our engineering team utilizes industry-leading software platforms such as ETAP and EasyPower to evaluate system performance under normal and fault conditions.

Our services include

Arc Flash Hazard Analysis in accordance with IEEE 1584 and NFPA 70E
Short Circuit and Fault Current Analysis
Protective Device Coordination Studies
Equipment Evaluation and SCCR Verification
Time-Current Coordination (TCC) Development
Electrical System Modeling and Validation
Arc Flash Mitigation Assessments
Utility and Distributed Energy Resource Impact Studies

Project Deliverables

Detailed electrical system model
Updated single-line diagrams
Arc flash labels and equipment schedules
Coordination curves and protective device settings
Engineering calculations and technical reports
Recommendations for system improvements and risk reduction

Value to Clients

By identifying fault levels, coordination deficiencies, and arc flash hazards, we help facility owners reduce operational risks, improve personnel safety, minimize downtime, and maintain compliance with applicable electrical safety standards.

We provides arc flash and breaker coordination studies in accordance with NFPA 70E – Standard for Electrical Safety in the Workplace and IEEE Standard 1584 – Guide for Performing Arc Flash Hazard Calculations. These studies are essential for regulatory compliance and play a critical role in ensuring employee safety.

Our team includes experts with over a decade of experience in similar projects. We understand the importance of these studies and assist facilities in meeting all applicable safety and compliance requirements. As part of our services, 3S MEP +S also prints and provides arc flash labels for application on electrical panels.

We utilize the SKM Power*Tools (System Analysis) software to model electrical systems and generate detailed, accurate reports.

Arc Flash Services

Model the electrical system using SKM Power*Tools (System Analysis) software.
Calculate fault current (worst-case short-circuit current) at each piece of equipment and compare it with the equipment’s short-circuit rating.
Review system coordination and provide recommendations to improve overall system reliability.
Perform arc flash hazard analysis and recommend mitigation measures, such as adjusting circuit breaker settings or selecting
Appropriate fuse types. Compile results and recommendations into a clear, easy-to-readreport.
Print arc flash hazard warning labels, including applicable PPE requirements.
Labels are provided for application on switch boards and panels by the client.

Solar PV Engineering & Design

We provide comprehensive solar photovoltaic (PV) system design services for commercial, industrial, and utility-scale projects. Our designs comply with applicable codes and standards, including the National Electrical Code (NEC Article 690, 705, 706), NFPA 70, NFPA 70E, International Building Code (IBC), International Fire Code (IFC), and local utility interconnection requirements. Services include system sizing, equipment selection, string design, single-line diagrams, layout drawings, voltage drop calculations, grounding and bonding design, rapid shutdown compliance, and utility coordination. Our designs focus on safety, performance, code compliance, and long-term system reliability.

Engineering Capabilities

Solar Feasibility and Energy Yield Studies
Photovoltaic System Sizing and Optimization
Utility Interconnection Support
DC and AC Electrical Design
Inverter and Transformer Selection
Ground-Mounted, Rooftop, and Carport Solar Design
Battery Energy Storage System (BESS) Integration
Protection and Grounding Design
Construction and Permit Documentation

Design Deliverables

Single-Line Diagrams (SLD)
Site and Array Layouts
Stringing and Equipment Layout Drawings
Conduit and Conductor Sizing Calculations
Voltage Drop and Load Flow Analysis
Equipment Specifications and Schedules
Interconnection Packages
Permit and Issued-for-Construction (IFC) Drawings

Our Approach

Every solar project is engineered with a focus on energy production, system reliability, code compliance, and ease of installation. Through detailed engineering analysis and coordination with utilities, contractors, and stakeholders, we help clients successfully deliver renewable energy projects from concept through construction.

3S MEP + S provides integrated MEP, Fire Protection, Fire Alarm, BIM, Energy Modeling, and Structural Engineering services for building projects.