Explosion proof Equipment
Explosion proof Equipment
(OP)
Electric heater to be installed in harzardous area has been offered from supplier. By the way I found it out that it has been tested and certified by UL. I requested supplier to hand in certificate but he said that UL does not issue certificate for that. Is that true ? The product from EU normally is brought with certificate, such as ATEX. I do not how it is dealt with in North America.
Secondly, my tech spec requires 220VAC(+6%/-10%) but it was 240VAC and it works at -10%/+10%. Our power supply is able to vary from +/-2.5%. The -tolerance of power supply(214.5V) is not within - tolerance of heater(216V).
Does it violate international codes or ?
Secondly, my tech spec requires 220VAC(+6%/-10%) but it was 240VAC and it works at -10%/+10%. Our power supply is able to vary from +/-2.5%. The -tolerance of power supply(214.5V) is not within - tolerance of heater(216V).
Does it violate international codes or ?






RE: Explosion proof Equipment
RE: Explosion proof Equipment
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If we learn from our mistakes I'm getting a great education!
RE: Explosion proof Equipment
Is your supply 60 Hz.?
A standard motor voltage in North America is 230 volts. You should be safe at 220 volts on a 230 volt motor. There are millions of 230 volt 3 phase motors working happily on 208 volt systems in North America. There is a new standard voltage of 200 volts for 208 volt systems, but millions of 230 volt motors remain in service on 208 volt systems.
Bill
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"Why not the best?"
Jimmy Carter
RE: Explosion proof Equipment
If the project is located within a country that has adopted the AtEx directives into national legislation (I assume that that is every EU country barring the most recent accession states) then there is a legal requirement to use only AtEx certified equipment.
I’m a bit rusty on this but I think that the 94/9 EC (equipment) directive prevents suppliers or manufacturer’s placing non-AtEx equipment on the market (so your supplier could be in trouble) and the 99/92 directive (worker safety) directive effectively requires Employers to use only AtEx certified equipment and components.
Is the 220V requirement from a specification or is it the actual system voltage ? I see a lot of specifications here citing 380/220V and 415/240V but the actual standard distribution voltage in these parts has been 400/230V since 1991.
Hope this helps,
Colin
Clients pay to be told what you think - not what they think (but THEY don't always think that).