Document of Conformity

IECEx Certificate

of Conformity

Certificate No.: IECEx UL 16.0025U

Issue No.: 1

Page 3 of 3

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• The terminal blocks shall be placed inside a suitable IECEx certified IP54 enclosure for gas

atmosphere. For dust atmosphere the terminal blocks shall be mounted inside a suitable IECEx certified

‘t’ enclosure (IEC 60079-31).

• The enclosure shall be constructed to block all sun and UV light from affecting the terminal blocks.

• Under normal operating conditions the temperature rise of the terminal blocks is max 40 K, measured

with the max permitted rated current. Due to the above mentioned the terminal blocks may be used in

apparatus of temperature classes T6…T1 as long as the terminal block ambient temperature range is

not exceeded as shown below. No part of terminal block must exceed 110 °C under any condition.

T6 (- 60°C ... +40 °C)

T5 (- 60°C … +55 °C)

T4 (- 60°C ... +70 °C)

• When using the types ZDK with other terminal blocks series or sizes or accessories, the requirements

for clearance and creepage distances according to table 2 of IEC 60079-7 must be observed.

Regarding the use of covers, cross-connectors and end brackets the instructions of the manufacturer

must be followed.

• For cross connection accessories current and voltage rating, resistance across the terminal please

refer to “Notice to installers”.

• If smaller conductor cross sections than the rated conductor cross sections are used, then the

corresponding lower current shall be stated in the Certificate of the complete apparatus