NEC / CEC REFERENCE FOR EXPLOSIVE ATMOSPHERES AND HAZARDOUS LOCATIONS

NEC / CEC PRODUCT MARKINGS

 

 

NEC / CEC METHOD OF EXPLOSION PROTECTION

NEC / CEC HAZARDOUS AREA CLASSIFICATION

NEC / CEC EXPLOSION GROUPS

NEC / CEC FULL REFERENCES

ATEX / IEC REFERENCE FOR EXPLOSIVE ATMOSPHERES AND HAZARDOUS LOCATIONS

ATEX / IEC PRODUCT MARKINGS

ATEX / IEC METHOD OF EXPLOSION PROTECTION

ATEX / IEC HAZARDOUS ZONE CLASSIFICATION

ATEX / IEC EXPLOSION GROUPS

ATEX / IEC NAMEPLATE MARKING

ATEX / IEC INGRESS PROTECTION (IP)

ATEX / IEC EXPLOSION ZONES

ATEX / IEC TEMPERATURE CLASSIFICATION

ATEX / IEC FULL REFERENCES

atex reference table | atex product markings | explosion proof | explosion protection | explosion protection technique | explosion group | nameplate marking | temperature classification | ingress protection

HAZARDOUS AREA LIGHTING VENDORS

1. Brand : COOPER CROUSE-HINDS
Zulkifli Ibrahim
Vendor: General Supply & Services (M) Sdn Bhd
No. A-1-5 Northpoint Offices
Mid Valley City
No.1 Medan Syed Putra Utara
59200 Kuala Lumpur, Malaysia
Office No: (603) 2282 2486
H/P No: 6012 297 6456
Email: zulu.ibrahim@gexpro.com

2.    Brand : HAZLUX

Chris Yow

Vendor: Deltric Sdn Bhd

No. 34 & 34-1, Jalan Puteri 2/2, Bandar Puteri,

47100 Puchong,

Selangor, Malaysia

Office No :( 603) 8060 9291

H/P No: 6012 390 5784

Email: chrisy@deltric.com.my

3.    Brand : PIERLITE

Solehan bin Mohamad

Vendor: Bekatech Design Sdn Bhd

No. 4, Jalan Putei 5/16, Bandar Puteri,

47130 Puchong,

 Selangor, Malaysia

Office No: (603) 8061 3782

H/P No: 016 215 6499

Email: solehan_mohd@yahoo.com

4.     Brand : CHALMIT

Kamaruzaman Baharuddin

Vendor: Offshore Industries Sdn Bhd

No. 95-1, Jalan 1/91, Taman Shamelin Perkasa,

56100 Kuala Lumpur, Malaysia

Office No: 603 92840613

H/P No: 6016 207 5589

Email: kamaruzaman@offshore-industries.com

5.    Brand : CHALMIT

Siti Paspa binti Mohamad Sofa

Vendor: Offshore Industries Sdn Bhd

No. 21, BDC Piasau Industrial Estate,

P.O Box 635, 98007 Miri,

Sarawak, Malaysia

Office No: 085 -651 823

H/P No: 019 814 9400

Email: siti.paspa@offshore-industries.com

6.    Brand: THOMAS & BETTS

Vincent Loh

Vendor: Thomas & Betts Asia

Level 20, Menara Standard Chartered,

30 Jalan Sultan Ismail

50250 Kuala Lumpur, Malaysia

Office No: 603 2117 5068

H/P No: 6019 2277 088

Email: vincent.loh@tnb.com

7.    Brand: PHILLIPS

Ng Chee Hoong

Vendor: Phillips

Level 9, Menara Axis

2, Jalan 51A/223, 46100 Petaling Jaya,

Selangor, Malaysia

Office No: 603 7965 7488

H/P No: 6016 216 2116

Email: chee.hoong.ng@philips.com

Tan Bin Chee

Vendor: Swift Energy

Block D2-06 & D2-07, 

Pusat Perdagangan Dana 1, 47301 Petaling Jaya,

Selangor, Malaysia

Office No: 603 7842 6881

H/P No: 6019 668 1802 / 6016 210 2030

Email: bctan@senergy.com.my

Brand : AURA LIGHT
Zulkifli Ibrahim
Vendor: General Supply & Services (M) Sdn Bhd
No. A-1-5 Northpoint Offices
Mid Valley City
No.1 Medan Syed Putra Utara
59200 Kuala Lumpur, Malaysia
Office No: (603) 2282 2486
H/P No: 6012 297 6456
Email: zulu.ibrahim@gexpro.com

Brand : THORN
Vendor: Oversea Lighting (M) Sdn Bhd

29-G, Jalan PDR 5, Pusat Perniagaan Desaria 2,

43300 Balakong, Selangor Darul Ehsan.

Tel: 603-8961 9962, 8961 6961 

Fax: 603-8962 1868

E-mail: oversealighting@pd.jaring.my

HAZARDOUS AREA CLASSIFICATION

Hazardous Area

A hazardous area is defined as an area in which an explosive atmosphere is present, or may be expected to be present, in quantities such as to require special precautions for the construction, installation and use potential ignition sources.

An explosion will occur when three basic conditions are present and remove any of these basic conditions and an explosion will not occur :

• Explosive material (Gas,Liquid,Dust)
• Oxygen / Air
• Source of Ignition (Temperature Rise, Spark)

Classification of Hazardous Areas

The purpose of area classification is to provide a basis for the correct selection, installation and location of electrical and non-electrical equipment in those areas. Areas must be classified depending on the properties of the flammable vapours, liquids, gases, mists, combustible dusts or fibres that may be present and the likelihood that a flammable or combustible concentration or quantity is present.

The aim of area classification is to avoid ignition of flammable release that may be occur in the operation of facilities. The intent is to reduce to an acceptable minimum level that probability of a flammable atmosphere and an ignition source occurring at the same time.

The classification of ZONE is a complex problem but the main factors to consider are :

• The probability of the presence of gas.
• The quantity and duration of hazardous vapour.
• The amount of ventilation.
• The nature of gas : either lighter or heavier than air.

Hazardous areas may be sub-divided into three zones, as shown below


(FOR FLAMMABLE GASES AND VAPOURS):

• Zone 0 - An area in which an explosive atmosphere is constantly present, or present for long periods.
• Zone 1 - An area in which an explosive atmosphere is likely to occur in normal operation.(Rough Guide : 10 hours or more per year but less than 1000 hours per year)
• Zone 2 - An area in which an explosive atmosphere is not likely to occur in normal operation and if it occur it will exist only for a short time. (Rough Guide : Less than 10 hours per year)

 (FOR COMBUSTIBLE DUSTS):

• Zone 20 - An area in which combustible dust, as a cloud, is present continuously or frequently during normal operation in sufficient quantity to be capable of producing an explosive concentration of combustible dust in a mixture with air.
• Zone 21 - An area in which combustible dust, as a cloud, is occasionally present during normal operation in sufficient quantity to be capable of producing an explosive concentration of combustible dust in a mixture with air.
• Zone 22 -  An area in which combustible dust, as a cloud, may occur infrequently and persist for only a short period, or in which accumulations of layers of combustible dust may give rise to an explosive concentration of combustible dust in a mixture with air.

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Group Classification

The grouping of gases and vapours are classified into Group I and Group II categories. Group I is for Mining Applications and Group II is for General Industry. Group I equipment has a representative gas of Methane and all equipment used in underground mining applications fall into this categories. Any other equipment will be Group II classified.

• I     - Methane
• IIA - Propane
• IIB - Ethylene
• IIC - Hydrogen, Acetylene

Equipment and apparatus certified with Group IIC can be used either in IIA, IIB and IIC areas. But items certified with IIA only can be used in IIA areas and so on.

Temperature Classification

The temperature classification on the electrical equipment label will be one of the following (Maximum Surface Temperature in degree Celsius) :

• T1 - 450
• T2 - 300
• T3 - 200
• T4 - 135
• T5 - 100
• T6 - 85

Temperature classes T1 to T6 are used for all protection techniques, and correspond to the electrical devices maximum operational temperature.The better the equipment, the lower the rated surface temperature.

Therefore, those items certified as being T6, can be used in T1, T2, T3, T4, T5 and T6 gases. Whereas a T2 certification only allows a piece of equipment to be used in T1 and T2 gases.

References:

1. IEC/EN 60079-0    - General Requirements
2. IEC/EN 60079-10  - Electrical apparatus for explosive gas atmospheres. Classification of hazardous areas.
3. IEC/EN 60079-14 - Explosive atmospheres. Electrical installations design, selection and erection.
4. IEC/EN 61892-7   - Mobile and fixed offshore units. Electrical installations. Hazardous areas.  

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