Calculations

Understanding Solar Irradiance Data for Accurate PV Design Accurate solar photovoltaic (PV) system design hinges on a deep understanding of solar irradiance data. This data quantifies the amount of solar energy reaching a specific location, forming the foundation for all …

Mastering Conduit Fill Math: A Guide to Calculating Circle Area Properly executing conduit fill math is a non-negotiable skill for any licensed electrician, forming the backbone of safe and compliant electrical installations. The core of these raceway calculations involves determining …

Mastering Levers for the CAST Test: Classes and Calculations Successfully mastering levers for the CAST test is a critical step for any aspiring electrical professional. The Mechanical Concepts portion of the EEI CAST test is a significant hurdle, and a …

Understanding Ratios for Transformer Voltage Calculations For any journeyman electrician or master electrician, a core competency is the ability to work confidently with an electrical transformer. Central to this is understanding the transformer turn ratio, a fundamental principle that dictates …

Sizing Neutral Conductors for Non-Linear Loads per NEC 220.61 Sizing neutral conductors correctly is a critical safety and operational task for any journeyman or master electrician, especially in modern electrical systems dominated by non-linear loads. According to NEC 220.61, when …

Solving for Unknowns: Basic Algebra for Electrical Formulas Mastering basic algebra for electricians is an essential skill for safety, efficiency, and professional growth. While modern calculators help, understanding how to manipulate and solve core electrical formulas is fundamental for any …

How to Use a Load Calc Worksheet for Office Buildings An accurate office building load calculation is a fundamental requirement for any commercial electrical project, ensuring the system is safe, efficient, and compliant with the National Electrical Code (NEC). For …

To maximize a solar array’s output, the optimal pv azimuth and tilt angle must be evaluated with both baseline rules and site-specific modeling. Generally, in the Northern Hemisphere, a common baseline for array azimuth is 180° (true south), and a …

Calculating Available Fault Current at Commercial Panelboards: A Guide for Electricians Performing an accurate available fault current calculation is a critical, non-negotiable skill for any professional electrician. This calculation determines the maximum current that an electrical system can deliver at …

How to Perform a Solar Shading Analysis for PV System Design A solar shading analysis is a critical process in PV system design that evaluates how surrounding objects—like trees, buildings, and chimneys—will cast shadows on a solar array throughout the …