NIHST
Hazardous-Location Awareness · HL-FND

Hazardous-Location Fundamentals

Course overview

Hazardous-Location Fundamentals is a course in NIHST WORX Academy's Hazardous-Location Awareness. It covers why hazardous locations exist, reading the room across 2 modules and 4 lessons, and counts toward the Tier 1 hazardous-location finishing credential.

Course outline

01

Why Hazardous Locations Exist

  • The Fire Triangle in a Paint Booth

    A finishing operation puts all three legs of the fire triangle in one room: atomized coating and solvent vapor (fuel), forced air (oxygen), and dozens of potential ignition sources (heat). Hazardous-location practice is the discipline of gu...

  • LEL, UEL, and the Flammable Range

    A vapor only burns within a band of concentration in air. Below the Lower Explosive Limit (LEL) the mixture is too lean to ignite; above the Upper Explosive Limit (UEL) it is too rich. Booth ventilation is engineered to keep the working spa...

02

Reading the Room

  • Class, Division, and Group in Plain Language

    The North American area-classification system answers three questions. Class asks what kind of hazard is present: Class I is flammable gases and vapors, the category every paint booth lives in. Division asks how often the hazard is present:...

  • Equipment That Belongs, Equipment That Kills

    Inside a Class I Division 1 zone, ordinary equipment is a loaded weapon. A standard light switch arcs every time it is thrown. A shop fan, a cell phone charger, a non-rated drop light: each is a credible ignition source in a vapor atmospher...

Enrolled students read the full lessons, track per-lesson progress, and complete this course toward their credential.

Enroll in the Hazardous-Location Awareness
BK
Reviewed by Benjamin Kurtz
NIHST Technical Authority

Questions

What does Hazardous-Location Fundamentals cover?+

Hazardous-Location Fundamentals is a course in NIHST WORX Academy's Hazardous-Location Awareness. It covers why hazardous locations exist, reading the room across 2 modules and 4 lessons, and counts toward the Tier 1 hazardous-location finishing credential.

How is this course structured?+

2 modules and 4 lessons of online instruction, authored against the NIHST competency standard and reinforced by hands-on lab work and supervised on-the-job hours.

What does it count toward?+

Completing every lesson in this course satisfies part of the coursework requirement for the Tier 1 credential. Coursework, a proctored exam, and signed OJT hours together gate the credential.

Related

All programs
How the courses ladder into tiers.
The competency standard
What this course is built against.
Tier 1 credential
What completing this counts toward.