Approval/Certificate/Document of Conformity
 [13]
   Schedule 
 [14]   EU-TYPE EXAMINATION CERTIFICATE No. 
DEMKO 14 ATEX 1338U Rev.5 
00-IC-F0056-2 – Issue 20.0 
This certificate may only be reproduced in its entirety and without any change, schedule included.    Page 6 of 6 
o  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 ≤ Tamb ≤ +40 °C) 
  T5 (- 60°C ≤ Tamb ≤ +55 °C) 
  T4 (- 60°C ≤ Tamb ≤ +70 °C) 
o  When using the types WDU and WPE with other terminal blocks series or sizes or accessories, the requirements for clearance 
and creepage distances according to table 1 of EN 60079-7 must be observed. Regarding the use of covers, cross-connectors 
and end brackets the instructions of the manufacturer must be followed. 
o  For terminal jumper accessories current ratings and the resistances across the terminals please refer to the table under “types & 
electrical rating” above. Details on creepage and clearance values and the required torque values are in the respective “Notice to 
installers”. 
o  The terminal can be used with either one or two wires into either side of the terminal. When two wires are used they must be of the 
same type, and of equal sizes. No other wire sizes or types than the ones specified in instructions must be used. The terminal 
blocks must either be mounted next to another block of the same type and size or with an end plate. 
o  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 
o  Unused terminals shall be tightened. 
[18]  Essential Health and Safety Requirements 
The Essential Health and Safety Requirements (EHSRs) covered by the standards listed at item 9. 
Additional information 
The trademark   will be used as the company identifier on the marking label. 
The manufacturer shall inform the notified body concerning all modifications to the technical documentation as described in Annex III to 
Directive 2014/34/EU of the European Parliament and the Council of 26 February 2014.






