Engineered Studies - C&H Electric

Safe systems. Protected teams. Compliant operations.

Engineered Electrical Studies for Safer, Smarter Facilities

C&H Electric’s engineered studies support facility leaders with the critical drawings and analysis required to maintain a safe, compliant and resilient workplace. Aside from efficiency and compliance, the Arc Flash Hazard Analysis will help identify the proper level of PPE for plant maintenance professionals to utilize while servicing equipment.

Core Services Overview

Short-Circuit Coordination Study

These studies are essential to ensure that all protective devices within your electrical system are properly orchestrated. C&H Electric conducts short-circuit studies to optimize system protection, ensuring the safety devices trip under the appropriate circumstances to minimize equipment damage and maintain system reliability...

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Electrical One-Line Diagrams

Clear and simplified one-line diagrams provide a comprehensive overview of your electrical system, making maintenance, troubleshooting, and compliance with industry standards more manageable. These diagrams are essential for the effective management of complex electrical infrastructures...

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Arc Flash Hazard Analysis

Evaluating the potential for arc flash incidents is crucial for protecting personnel and equipment. This analysis identifies risks and provides safety recommendations, including the use of PPE and compliance with NFPA and OSHA standards. Our analysis includes the production and placement of...

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Short-Circuit Coordination Study

A short-circuit coordination study evaluates how your electrical system’s protective devices (circuit breakers, fuses, relays) behave during a fault. It determines:

How much fault current will flow
How long it will take devices to clear the fault
Whether those devices will act selectively—isolating only the affected portion of the system

This process involves:

Short-Circuit Analysis – Identifies the magnitude of fault current at each system node
Time-Current Coordination – Ensures device settings are staggered so upstream protection doesn’t trip first
Arc Flash Evaluation – Helps determine PPE and label requirements

Why it Matters

Without proper coordination, multiple devices can trip during a single fault, shutting down more of your system than necessary. This can:

Lead to unplanned production downtime
Increase repair costs
Damage equipment
Create unnecessary safety risks

A properly executed short-circuit coordination study will:

Improve fault containment
Prevent nuisance tripping
Increase worker safety
Ensure regulatory compliance
Support future system upgrades or expansions

One-Line Diagram for Electrical Systems

Electrical systems are complex, involving various components like transformers, breakers, and loads. A One-Line Diagram (or Single-Line Diagram) simplifies this complexity into a clear, single-path visual that shows how power flows through a facility. It’s an essential tool for engineers, electricians, and facility managers to troubleshoot, maintain systems, and stay compliant with NFPA and OSHA standards. By condensing multi-phase details into a streamlined view, it improves safety, planning, and operational efficiency. C&H Electric helps ensure your diagrams are accurate, up-to-date, and compliance-ready.

Critical for Facility Safety

One-Line Diagrams are essential for safe, code-compliant operations.

Required by OSHA, NFPA 70E, and NFPA 70B
Helps assess arc flash risks and PPE requirements
Supports safer maintenance and faster issue resolution
Ensures preparedness for audits, inspections, or emergencies

When to Update Your Diagram

Keep documentation aligned with your real-world system layout.

After adding generators, panels, or new loads
Following electrical upgrades or reconfigurations
If no diagram has been updated in 3–5+ years
Before conducting engineered studies or arc flash analysis

What C&H Electric Delivers

Comprehensive, compliance-ready One-Line Diagram services.

Custom diagrams based on your facility’s specific layout
Digital and printable formats (PDF, CAD)
Designed to meet NFPA and OSHA requirements
Ongoing updates available as your system evolves

Arc Flash Hazard Analysis

Arc flash incidents are among the most dangerous electrical hazards in the workplace, capable of causing severe injuries, equipment damage, and costly downtime. An arc flash occurs when electrical current deviates from its intended path, creating an intense burst of heat and pressure. Temperatures can reach up to 35,000°F—hotter than the surface of the sun—posing a serious risk to personnel working near electrical equipment.

To mitigate these risks, facilities must conduct an Arc Flash Hazard Analysis, also known as an Incident Energy Analysis. This assessment identifies potential arc flash hazards, determines the severity of incident energy exposure, and establishes the necessary protective measures, including Personal Protective Equipment (PPE) requirements. Compliance with NFPA 70E and OSHA regulations ensures a safer work environment and minimizes liability for businesses.