Calculations

Mastering Measurement: How to Read Scales and Dials for Graphic Arithmetic Questions Effectively knowing how to read scales and dials is a fundamental skill that separates novice technicians from seasoned professionals. For both a journeyman electrician and master electrician, this …

A Master Electrician’s Guide to Show Window & Track Lighting Load Calculations (NEC 220.46) Accurately performing a show window lighting load calculation is a fundamental skill for any journeyman or master electrician working in commercial occupancies. The specific provisions for …

Designing for Wind & Snow Loads on Rooftop Solar Arrays Properly calculating for solar wind and snow loads is a critical, non-negotiable step for ensuring the safety, longevity, and code compliance of any rooftop photovoltaic (PV) installation. For the master …

For electricians in the field, mastering fractions is not just an abstract mathematical exercise; it is a critical, hands-on skill essential for safety, precision, and efficiency. Strong command of fractions for electricians is fundamental to tasks ranging from physical installations, …

Mastering Cable Tray Ampacity Calculation: A Guide to NEC 392.80 Performing a correct cable tray ampacity calculation is a critical skill for any licensed electrician, ensuring both safety and compliance with the National Electrical Code (NEC). The process involves determining …

Feeder Sizing for Multiple Motors: An Electrician’s Guide to NEC 430.24 Correctly performing feeder sizing for multiple motors is a critical skill for any journeyman or master electrician. Governed by the National Electrical Code (NEC), these motor load calculations ensure …

Intro to Powers of 10 for Electrical Prefixes (kilo, mega) For any professional journeyman electrician or master electrician, mastering electrical prefixes is not just a suggestion—it’s a fundamental requirement for safety, accuracy, and efficiency on the job. Prefixes like kilo …

PV String Sizing Calculations for Grid-Tied Inverters: A Master Electrician’s Guide Proper PV string sizing calculations are critical for designing a safe, efficient, and code-compliant solar energy system. These calculations determine the correct number of solar modules to connect in …

A Step-by-Step Guide to Residential Solar System Sizing Proper residential solar system sizing is the critical first step for any successful photovoltaic (PV) installation. Accurately sizing a system ensures it meets the homeowner’s energy needs, operates efficiently, and complies with …

Applying Demand Factors for Schools per NEC 220.86 A proper school load calculation is a fundamental skill for any journeyman electrician or master electrician, ensuring the safety and efficiency of a facility’s electrical infrastructure. According to the NEC code book, …