With HazLoc Lights you need to understand what is known as"Ignition Triangle" or "The Fire Triangle". This is a simple three part triangle that illustrates the key components required to create a spark, fire or explosion depending on the components involved.
- A Source of Fuel
- An Oxygen Environment
- A Source of Ignition
Hazardous Locations are determined by this Triangle. This is how a Fire or Explosion occurs - all three elements must be present - and the lighting fixture can be considered a potential source of ignition.
So - let's look at the NEC Code, and at what it says about Hazardous Locations. To correctly understand and apply Hazardous Location classifications and zones, we must start with NEC Code, Article 500:
In this section, the Word "Hazardous" denotes the way a particular location is classified due to either:
- Flammability properties within that area, or
- Specific use of that area.
There are three classifications: