Tamlite: lighting for hazardous areas

The first question has to be – what is a hazardous area?

Guidance on what constitutes a Hazardous Area is published by the Health and Safety Executive. Its is not compulsory to follow the guidance, though doing so is normally enough to be operating within the law. HSE inspectors seek compliance with the law and the HSE guidance is seen as illustrating good practice.

Hazardous Areas are those that can possibly contain flammable substances, which will then require special precautions for the use of electrical equipment. There is a system of classification that determines the rating of a Hazardous Area. A risk assessment of fire and explosion hazards is required by the Dangerous Substances and Explosive Atmospheres Regulations 2002, requiring employers to classify areas where explosive atmospheres can form.

The Regulations define three zones that can exist in a hazardous area:

Zone 0: A place where an explosive atmosphere is present continuously or for long periods

Zone 1: A place in which an explosive atmosphere is likely to occur in normal operations occasionally

Zone 2: A place in which an explosive atmosphere is not likely to occur in normal operation but if it does occur, will persist for a short time only.

Although this system of categorisation was originally focused on the chemical industry, the Regulations require that a risk assessment is carried out in a far wider range of workplaces, such as laboratories. Hazards do not only occur from obvious sources of flame. Spills and breakages can also lead to catastrophic damage. That is why a risk assessment is such an important factor in determining whether an environment is hazardous or not.

The basic principles for dealing with Hazardous Area lighting is based on the principle that no electrical equipment should be capable of producing a source of ignition. Flammable sources can be gas vapours, but also include dust+air mixtures.

 There are many other examples of applications which may require hazardous area lighting, including:

  • Petrol Stations
  • Flour and paper mills
  • Garages
  • Chemical or pharmaceutical manufacturers
  • Painting workshops
  • Bakeries or other food manufacturers

The table below summarises the definition of ATEX zones:

What is ATEX?

This is the name given to two European directives for controlling explosive atmospheres. (We assume that there is/will be a UK-specific version of ATEX (ATEX-UK perhaps)

ATEX 137 sets out minimum requirements for improving the health and safety protection of workers potentially at risk from explosive atmospheres.

ATEX 95 approximates to the laws of EU member states concerning equipment and protective systems intended for use in potentially explosive atmospheres.

Gas / Vapour Dust / Air Mixtures Definition ATEX
0 20 A place in which an explosive atmosphere is continually present (>1000 hours/year) 1G or 1D equipment for Zone 0 to Zone 20
1 21 A place in which an explosive atmosphere is likely to occur in normal operation occasionally
(>10>1000 hours/year)
2G or 2D equipment for Zone 1 to Zone 21
2 22 A place in which an explosive atmosphere is not likely to occur in normal operation, but if it does only for short periods
(<10 hours/year)
3G or 3D equipment for Zone 2 to Zone 22

Tamlite provides lighting solutions for the most common hazardous applications, those addressed by Zone 2/22 and all to ATEX category 3.

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Zenith X

Product features

  • Zone 2/22 hazardous area high/low bay
  • Suitable for indoor areas of high risk explosions or high temperature applications
  • Wall or ceiling mounting
  • For use in ambient temperature range of -20°C to + 45°C
  • Certified to EN 60079 zone 2 (GAS) and zone 22 (DUST)
  • ATEX certified for category 3, certified type Ex ec II 3G Ex nr IIC T6 Gc/3D Ex tc IIIC T68ºC DC
  • CRI: Ra>80
  • Up to 139 lumens per Watt efficacy
  • 60,000 hours lifetime (L80/B10)

ZENITH X DATASHEET

Explorer X

Product features

  • Zone 2/22 hazardous area floodlight
  • Suitable for outdoor areas of high risk explosions
  • Wall or pole mounting
  • For use in ambient temperature range of -20°C to + 45°C
  • Certified to EN 60079 zone 2 (GAS) and zone 22 (DUST)
  • ATEX certified for category 3, certified type Ex ec IIC T4 Gc
  • CRI: Ra>70
  • Up to 155 lumens per Watt efficacy
  • 60,000 hours lifetime (L80/B10)
  • EXPLORER X DATASHEET

Elite X

Product features

  • Zone 2/22 hazardous area bulkhead
  • Suitable for indoor areas of high risk explosions
  • Wall or ceiling mount
  • For use in ambient temperature range of -20°C to + 40°C
  • Certified to EN 60079 zone 2 (GAS) and zone 22 (DUST)
  • Also available in maintained or non-maintained emergency
  • ATEX certified for category 3, certified type Ex nR IIC T6 Gc & Ex tc IIIC T65
  • CRI: Ra>80
  • 100 lumens per Watt efficacy
  • 60,000 hours lifetime (L80/B10)

ELITE X DATASHEET

Elite XEM

Product features

  • Zone 2/22 hazardous area emergency bulkhead
  • Suitable for indoor areas of high risk explosions
  • Wall or ceiling mount
  • For use in ambient temperature range of -0°C to + 35°C
  • Certified to EN 60079 zone 2 (GAS) and zone 22 (DUST)
  • ATEX certified for category 3, certified type Ex nR IIC T6 Gc & Ex tc IIIC T65
  • CRI: Ra>80
  • 100 lumens per Watt efficacy
  • 60,000 hours lifetime (L80/B10)

ELITE X EM DATASHEET

CYCLONE X

Product features

  • Zone 2/22 hazardous area weatherproof fitting
  • Suitable for indoor areas of high risk explosions or outdoor under shelters
  • Various mounting options on ceiling or wall
  • For use in ambient temperature range of -20°C to + 45°C
  • Certified to EN 60079 zone 2 (GAS) and zone 22 (DUST)
  • Easy clip-on design for quick install and maintenance
  • ATEX certified for category 3, certified type Ex nR IIC°T6 Gc & Ex tc IIIC T62
  • CRI: Ra>80
  • Up to 118 lumens per Watt efficacy
  • 50,000 hours lifetime (L80/B10)

CYCLONE X DATASHEET

Something that is often forgotten when ‘protected’ lighting is considered is the quality of light that may be required. The focus tends to shift to the (albeit vital) importance of protecting the occupants, forgetting that these fixtures are mostly used to illuminate the day-to-day working environment.

Historically, or pre-LED, light sources tended to be the highest efficacy, and thereby the lowest light quality for that light. The LED has changed that perception and there is no reason why lighting for hazardous areas should equate to poor lighting quality.

The LEDs used in the Tamlite hazardous range have a colour rendering greater than 0.8 (CRI >80) and the colour temperature is industry standard for commercial applications at 4000K.
NOTE: Explorer X floodlight at CRI>70.

Maintenance of the fixtures is minimal, with the light sources having a rated life of 60,000 hours (to L80/B10). That just leaves surface cleansing to be dealt with and the housings and diffusers have been designed to provide ease of cleaning.

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