C1D1

Class 1 Division 1

LED lighting (C1, D1) is used in hazardous areas to prevent high voltage, high current equipment from generating an ignition source. Heavy-duty luminaires surround the parts that produce sparks, so if steam or gas leaks and is ignited, it contains an explosion. Suitable for general industrial and general marine applications requiring anti-steam or waterproof fixtures.

Class 1 Division 2

One of the following three conditions must exist to consider a Class I Division 2 location:

  1. Handling, processing or using volatile flammable liquids or flammable gases, but hazardous liquids, vapors or gases are usually confined to closed containers or closed systems and can only escape if they are accidentally broken or damaged. System, or due to abnormal operation of the device.
  2. Active mechanical ventilation prevents gases or vapors of combustible concentrations and may become dangerous due to malfunction or abnormal operation of the ventilation equipment.
  3. Adjacent to Class I Zone 1, occasionally the concentration of flammable gases or vapors may be transmitted unless adequate positive pressure ventilation is provided through a clean air source to prevent such communications and to effectively prevent ventilation failure.

Occurrence Frequency

Continuous Frequency

Intermittent Periodically Frequency

Abnormal Conditions Frequency

Class, Division

Class 1, Division 1

Class 1, Division 1

Class 1, Division 2

Zone

Zone 0

Zone 1

Zone 2

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