Cable choice Class I, Division 1

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Henas

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Hi everyone,

I am working on redesigning a mobile breathing air system from ATEX standards to North American cCSAus. The end customer aim is the O&G industri.

The control panel in the unit is a Explosion-proof enclosure classified for Class 1 Division 1 Gasgr C-D.

The unit is W x H X L: 750mm x 1100 x 1100, and i am looking for some advice on what kind of cables you would recommend when flexability is key.

There is a variety of detectors and sensors for measuring the quality of the breathing air.

For the detectors that are Non-I.S i was thinking MC-HL cable.
For the detectors that are I.S. i would like to know what you usually use?
There is also 7,5HP motor, I was thinking of Polyrad XT-125 from General Cables, but it seems that it is only approved for offshore/marine installations/rigs etc and not mainland industry.

Hope some of you would like to share some advice around this subject, and please correct me if I am way of target :)
 
MC-HL is fine; in fact, all XX–HL cables are fine. However, you may find they are not nearly as flexible as you might like. You might want to review Section 500.140 for other flexible wiring options.

I would also suggest you contact UL, CSA, INTERTEK, FM or one of their Norwegian affiliates, especially if you intend to have the product certified for US domestic use.
 
Henas said:
http://youtu.be/xvUrIEgHgRc

Follow the link don_resqcapt19 to see the system i am reffering to. Any feedback is welcomed.
Click to expand...
If I am going to be breathing that air, I want the compressor in the non-classified area. I would not be happy with the compressor in the classified area. I would much prefer the compressor in the uncontaminated area and extend high pressure hoses to the contaminated work area. (just my opinion)
 
One of the greatest misunderstandings when comparing IEC Zones and NEC Divisions is that Zone 1 is equivalent to Division 1; it isn't.

IEC Zone 1 is more like a "super" NEC Division 2 which is why most IEC Zone 1 protection techniques are not acceptable in NEC Division 1 but are in NEC Division 2. See Section 501.5.
 
Thank you for your feedback!

don_resqcapt19; I can see why you would like the a breathing air compressor to be located in a non-contaminaded area. However this system monitor the breathing air supplied to the end user continuesly to make sure that the quality is supreme.

rbalex: I am aware of the difference between Zones/Divisions. One of the reasons going for Div 1 for this unit is that it is trolley based and therefor can be moved. If it was Div2, someone might say "How can we guarentee that someone wouldnt place it in a Div1 area and just go ahead with the job"
 
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