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Class 1 Div 1 Lighting

Class 1 Div 1 Lighting are explosion rated lighting designed to work in explosive environments where hazardous conditions and concentrations of flammable combustible vapors, liquids or gases, are always present. Class 1 Areas are defined as groups and are categorized by the type of material found. The most common groups are: (A) Acetylene, (B) Hydrogen, (C) Ethylene and/or propane and (D) Propane, butane, methane and benzene.
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Frequently Asked Questions

There’s a lot of questions around Class 1 Div 1 lighting, so we asked our customers what questions they wished they had answered before they made a purchase. Scroll below to find answers to our most common questions or call (888) 423-3191 to speak with a lighting expert.

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General

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Before you buy

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Fixtures and Fittings

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Installation

General

What Is Class 1 Div 1?

Class 1 Division 1 is a classification of explosion ratings designed to work in explosive environments where hazardous conditions and concentrations of flammable combustible vapors, liquids or gases, are always present.

What Is a Class 1 Div 1 Area?

Class 1 Areas are defined as groups. Groups are categorized by the type of material found. The most common groups are: (A) Acetylene, (B) Hydrogen, (C) Ethylene and/or propane and (D) Propane, butane, methane and benzene. It is common to see Class 1 Div 1 Groups C and D but not Class 1 Div 1 Groups A and B.

Is Class 1 Div 1 Explosion Proof?

Yes, Class 1 Div 1 is explosion proof under UL844 testing standard.

Explosion Proof High Bay C1D1

Class 1 Div 1 High Bay

Explosion Proof Linear

Class 1 Div 1 Linear

LED Explosion Proof Light Installed

Is Class 1 Div 1 Stricter Than Div 2?

Yes, it is. Class 1 Div 1 is the strictest of all standards, followed by Class 1 Div 2.

What’s the Difference Between Class 1 Div 1 and Class 1 Div 2?

The main difference is the definition of whether gas or other explosive materials are always present or sometimes present. Class 1 Div 1 handles ‘always present’, while Class 1 Div 2 is for ‘sometimes present’ environments.

Is Class 1 Div 1 the Same as Atex?

Class 1 Div 1 is a classification of explosion proof lighting that we use in North America. ATEX is a different standard not used in this country. Lights that are UL rated and tested for Class 1 Div 1 do not automatically qualify for ATEX certification and vice versa. In other words, an ATEX classification that is similar to Class 1 Div 1 does not mean the light has met UL’ standard for Class 1 Div 1.

What Are the Benefits of Using Class 1 Div 1?

Like other LED lights, explosion proof fixtures provide the same key benefits - energy saving, reduced maintenance and improved quality of light. They also meet the certification requirements needed in a Class1 Div 1 application and will provide a safe lighting environment.

BEFORE YOU BUY

What Gases Can Be Used in a Class 1 Div 1?

The gases used in Class 1 Div 1 are Acetylene, Hydrogen, Ethylene, Propane, Butane, Methane and Benzene.

outdoor refinery lights at night

Do You Have Class 1 Div 1 Lights in Stock?

We have stock available in the USA. Contact us and we can tell you how many of the lights that you need we have available at that moment.

How Quickly Can You Ship Class 1 Div 1 Lights to My Location?

Typically, once the order is placed, lights can ship in 4 to 7 business days. All our explosion proof fixtures go through a final 100% burn process to ensure 100% functionality when you get the fixture.

Is Class 1 Div 1 Intrinsically Safe?

It can be, but you need to understand the difference between explosion proof and intrinsically safe lighting.

Explosion proof fixtures are designed in case there is an explosion or spark inside the fixture, it would be channeled and cooled. So, when it comes to the point to escape the fixture, it does not result in an explosion in that environment.

Intrinsically safe lights are different. They are designed in such a way that they are not capable of creating an explosion or spark by themselves. They are low voltage battery-operated fixtures.

What Are Class 1 Div 1 Lights Made Of?

Typically these fixtures are high impact, heavy aluminum frames with thick tempered glass

Do Class 1 Div 1 Lights Come with Power Cords?

Not always. Everything inside the area of Class 1 Div 1 needs to also be Class 1 Div 1 rated. That includes the conduit, junction boxes and switches. Having an external power cord similar to what you find in a normal high bay installation does not make sense in this environment.

What Accessories Are Needed to Install Class 1 Div 1 Lighting?

Everything this light is connected to inside the room also needs to be Class 1 Div 1 rated. There are some accessories available, but they are limited due to the special nature of this fixture.

FIXTURES AND FITTINGS

What Are the Best Applications of Class 1 Div 1 Lighting?

The best applications of Class 1 Div 1 lighting are hazardous environments where explosive gases or materials are always present.

Can You Hard Wire Electrical Connections in Class 1 Div 1 Areas?

Yes, but you need to work with a qualified electrician who understands and is certified in this type of environment. And, there can not be any exposed wires.

Can I Get Away with Class 1 Div 2 or a Vaportite Fixture?

Never use vapor tight fixtures in place of either a Class 1 Div 1 or Class 1 Div 2 fixture. That is not what they are designed for. They are designed to keep a non-explosive corrosive or damaging atmosphere from damaging the internal lighting components of the fixture.

Please check with your local permitting or fire department to confirm if a Class 1 Div 1 fixture is required for your application.

INSTALLATION

How Do I Install Class 1 Div 1 Lights?

A word of caution: Never install these lights on your own. Make sure to always hire an experienced and qualified electrician to do the job for you.

Do You Need a Class 1 Div 1 Lighting Plan?

A lighting plan uses specialized lighting software to create a model of your indoor or outdoor space, place explosion proof lighting in this space, and then calculate light levels and how balanced the light is in the area.

It takes away all the guesswork and makes converting to LED lights simple and easy.

Explosion Proof Lighting Plan
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