Free Trial Download and try today

“Required PPE” Removed From Arc-Flash Schedule

Posted on May 23rd, 2019. Last updated on December 4th, 2023.

Q: I updated Design Master and my arc-flash schedule no longer has a “Required PPE” column. Why is the “Required PPE” column missing from my arc-flash schedule?

A: DM Electrical 8.6+ and ElectroBIM 1.4+ follow more recent guidance from NFPA 70E, which states that the NFPA 70E PPE category should not be used if the incident energy is known.

According to NFPA 70E 2021 130.5(H)(3)(a), arc-flash labels must show the “Available incident energy and corresponding working distance, or the arc flash PPE category in Table 130.7(C)(15)(a) or Table 130.7(C)(15)(b) for the equipment, but not both.” This is because the incident energy and tables can present conflicting information to the person working on the equipment.

These tables provide conservative guidelines for PPE requirements based upon the type of distribution equipment, voltage, and assumptions about factors that affect the incident energy. The “Required PPE” column listed the PPE category as determined by these tables. The primary drawback to using this information is a lack of precision: it does not account for details such as the calculated incident energy of the equipment or site-specific PPE requirements.

If the PPE category as determined by NFPA 70E 2021 Table 130.7(C)(15)(a) or (b) is listed on the equipment, it is assumed the person working on the equipment must use the PPE for that category as listed in Table 130.7(C)(15)(c). However, most sites will have their own PPE requirements suited to their needs and resources, which may not fully align with Table 130.7(C)(15)(c). If only the incident energy and working distance are provided, the worker will know to follow the site-specific PPE requirements based upon that information.

Related Articles

Filter by
Post Page
ElectroBIM ElectroBIM General Electrical One-Line Diagrams ElectroBIM Single-Line Diagrams Circuiting Calculations
Sort by

Linked Revit Model Room Names in Circuit Descriptions

Room names must be defined in your electrical model for ElectroBIM to use them in your circuit descriptions. Fortunately, Revit does have tools to help you quickly import the rooms from the linked model.


Electrical Design Basics in Revit

If you’re thinking about moving your electrical workflow to Revit, here are the concepts you’ll need to learn before you get started.


Changing Feeder ID Formats

Changing your feeder ID format at the beginning of a project is simple; changing it mid-project requires deleting and redefining existing IDs.


Electrical Load Type Explanations

This article describes the load types available in Design Master Electrical and how they should be used.


Arc-Flash Overview

You can use Design Master Electrical to calculate arc-flash, display the calculations on the drawing, and print stickers to place on distribution equipment.


Bus Ducts in Revit

ElectroBIM can work with bus ducts, but some additional work is required to calculate feeder lengths properly.