G/TBT/N/GUY/28  
24 October 2019  
(19-7050) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  GUYANA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:   
Guyana National Bureau of Standards  
Flat 15, National Exhibition Complex  
Sophia, Greater Georgetown  
gnbs@networksgy.com  
+592 219 0062/0065/0071  
http://www.gnbsgy.org  
Name and address (including telepho ne and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:   
3. Notified under Article 2.9.2 [X], 2.10.1 [   ], 5.6.2 [   ], 5.7.1  [  ], other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  HS: 
8535.29 These requirements cover enclosed and open -type Surge Protective Devices 
(SPDs) designed for repeated limiting of transient voltage surges as specified in the 
standard on 50 or 60 Hz power circuits not exceeding 1000 V and for PV applications up 
to 1500 V dc and designated as follows: Type 1 – One port, permanently connected SPDs, 
except for watt -hour meter socket enclosures, intended for installation between the 
secondary of the service transformer and the line side of the service equipment 
overcurrent device, as well as the load side, including watthour meter socket enclosures 
and Molded Case SPDs intended to be installed without an external overcurrent protective 
device. Type 1 SPDs for use in PV systems can be connected between the PV array and 
the main service disconnect. Type 2 – Permanently connected SPDs intended for 
installation on the load side of the service equipment overcurrent device; including SPDs 
located at the branch panel and Molded Case SPDs. Type 3 – Point of utilization SPDs , 
installed at a minimum conductor length of 10 meters (30 feet) from the electrical service 
panel to the point of utilization, for example cord connected, direct plug -in, receptacle 
type and SPDs installed at the utilization equipment being protected. See  marking in 80.3. 
The distance (10 meters) is exclusive of conductors provided with or used to attach SPDs. 
Type 4 Component Assemblies – Component assembly consisting of one or more Type 5 
components together with a disconnect (integral or external) or a means of complying 
with the limited current tests in 44.4. Type 1, 2, 3 Component Assemblies – Consists of 
a Type 4 component assembly with internal or external short circuit protection. Type 5 – 
Discrete component surge suppressors, such as MOVs that may be mounted on a PWB, 
connected by its leads or provided within an enclosure with mounting means and wiring 
terminations; - Other (HS 853529)  
5. Title, number of pages and language(s) of the notified document:  Surge Protective 
Devices - GYS 524 (UL 1449) (213 page(s), in English)  G/TBT/N/GUY/28  
 
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  6. Description of content:  Requirements for Surge Protective Devices including 
requirements forconstruction, performance and markings.  
7. Objective and rationale, including the natu re of urgent problems where 
applicable:  In recent times large quantities of faulty components has been entering the 
country. The risk of electrocution and fire is high. Hence the need to exclude components 
that do not meet the requirements of the standards .; Protection of human health or safety  
8. Relevant documents:   
Guyana National Bureau of Standards Act 11 of 1984 (Section 20 and 22) and Official 
Gazette -Guyana. UL 1449 standard.  
9. Proposed date of adoption:  2 October 2019  
Proposed date of entry into force:  1 April 2020  
10. Final date for comments:  Document Adopted.  
11. Texts available from:  National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available , of other body: