Calculations
The articles in this section explain how different calculations work or provide additional context to calculation-related concepts in ElectroBIM.
📄️ Arc-Flash Calculations Video
Training video exploring the basics of arc-flash calculations and how to perform them in ElectroBIM.
📄️ Arc-Flash Settings & Sensitivity
There are several factors that can influence arc-flash calculations, such as the working distance and the electrode configuration.
📄️ Electrode Configurations for Arc-Flash Calculations
This article will help you determine the electrode configuration for your distribution equipment, in order to perform arc-flash calculations.
📄️ Reading & Configuring Time-Current Curves
A brief explanation of what each part of the time-current curve represents and how you can make changes to the curve.
📄️ Selective Coordination Video
Training video on how to specify the breaker curves for selective coordination and display the graphs to ensure your design meets your requirements.
📄️ Arc-Flash Trip Times
You can select a breaker or enter a trip time manually to calculate arc-flash values. If you don't have that information, here is a way you can estimate the trip time.
📄️ Customizing Selective Coordination Graphs in ElectroBIM
Using the Project Options command and standard Revit functionality, you can easily customize the appearance of your selective coordination graphs.
📄️ Required PPE Not Included In Arc-Flash Schedule
PPE requirements are not included in arc-flash schedules based upon guidance from NFPA 70E.
📄️ Voltage Drop Calculation Basis
Voltage drop calculations are based upon the calculated load, power factor, and other properties of the device(s) and connected wires.
📄️ Voltage Drop in Revit With ElectroBIM Video
Training video on how ElectroBIM calculates voltage drop and all the settings you can adjust.
📄️ Voltage Drop & Transformers Options
ElectroBIM offers three options for how to calculate voltage drop at transformers.
📄️ How Branch Circuit Voltage Drop is Calculated in ElectroBIM
ElectroBIM approximates voltage drop for branch circuits by measuring the average panel-to-device distance for each device on the circuit. This article details when this method works and it when it doesn't.
📄️ Fault Calculation Basis
The fault calculations are based upon IEEE Std 242-2001: IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems.
📄️ Fault Calculations Video
Training video exploring short-circuit fault analysis in ElectroBIM.
📄️ Motor Calculations in ElectroBIM Video
Training video on how to configure motors in ElectroBIM.
📄️ Feeder Sizing Basis
The wire size for a given ampacity is set in the Wire Ampacities command. This section describes the NEC values used for the default wire sizing and for adjustments due to ambient temperature.
📄️ Ground Wire Sizing in ElectroBIM Video
Training video on how the ground wire sizing sections of the NEC are implemented in ElectroBIM.
📄️ Wire Lengths in ElectroBIM Video
Training video on how ElectroBIM calculates wire lengths.
📄️ How Building Angle Affects Calculations
The Building Angle setting offsets the axes along which wire length calculations are performed, which can significantly impact several figures in your project.
📄️ ElectroBIM & Load Calculations
ElectroBIM does not affect how loads are populated or calculated in Revit. Here are some resources that may help.