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Trade and Industry Department The Government of the Hong Kong Special Administrative Region
Brand Hong Kong - Asia world city

Commercial Information Circulars

24-hour hotline : 23 922 922

e-mail address :

Ref : EIC 426/2

22 January 2018

Dear Sirs,

Commercial Information Circular No. 98/2018

Mexico : New Energy Efficiency Standards for External Power Supplies

The Mexican government has established mandatory energy efficiency standards for external power supplies. The new standard NOM-029-ENER-2017 will enter into force on 25 April 2018.


2.The new standard sets out (1) minimum energy efficiency standards in operation mode; (2) maximum power limits in no-load or vacuum mode; (3) test methods; (4) conformity assessment; and (5) marking and labelling requirements for external power supplies. It covers external power supplies that convert alternating current voltage to a single level of fixed continuous current voltage with a maximum output power of 250 watts or less, with the exclusion of external power supplies incorporating a battery, battery pack or battery type/chemistry switch, as well as supplies that form part of equipment and apparatus that are not sold to the public and are intended for special uses. For details, please refer to the relevant official notice (in Spanish) at


3.For enquiries concerning the content of this circular, please contact Mr Lewis LAU at telephone number 2398 5405.

Yours faithfully,

(Jasper LAM)
for Director-General of Trade and Industry

Note: While every effort is made to ensure the accuracy of the above information, the Department cannot guarantee this to be so and will not be held liable for any reliance placed on the same.