Junction Box Selection ?

[Swami]

For Ex'ia' Temp.Transmitter which type of Junction Box(Protection) is to be used.(Can anybody Clarify with a Standard as Reference)

[Muthuraman]

You can refer IEC-60079-Part 0, IEC-60079-part 10, part 11

[amshah]

If you are working under IEC rules, you do not need a certified junction box for IS circuits. A junction box is classified as "Simple Apparatus".

Hence no need to procure special JB.


This is copied from other source , Applicabe to ATEX directies:
"
The definition of simple apparatus can be found in the harmonised European standard EN 50020 article 5.4 (= intrinsically safe equipment). Examples : switches, junction boxes, resistors, thermocouples, … This guideline is only applicable to electric equipment. These simple apparatus are excluded from the 94/9/EC directive because they have no intrinsic ignition source. In consequence, they don’t have to follow the conformity procedures and don’t have to be labelled following this directive.

Attention, this does not automatically implies that every simple apparatus is suitable for every application of the end user. Polyester boxes of category 1G for example should be antistatic. So, the user should decide for himself (risk analysis of the potential ignition sources) whether the simple apparatus is suitable for his application.

The same reasoning should be followed for non-electrical simple apparatus (plastic container, tube, chair,…). However, there is no definition for non-electrical simple apparatus, and in any case, end user should evaluate this separately. In fact, the problem is being shifted from the economic to the social directive. In case of discussion the ATEX Standing Committee will take a decision, as it has been done for the valves operated by human force."

Hence you will find vendors offering for above.

[Swami]

Thanks for Replies