ABS 291-2018 GUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY FOR OFFSHORE APPLICATION.pdf

1、 Guidance Notes on Recommended Specifications of Junction Box and Cable Tray for Offshore Application GUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY FOR OFFSHORE APPLICATION FEBRUARY 2018 American Bureau of Shipping Incorporated by Act of Legislature of the State of New

2、York 1862 2018 American Bureau of Shipping. All rights reserved. ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA Foreword Foreword These Guidance Notes provide ABS recommendations for the design and construction of cable trays and junction boxes. These Guidance Notes are applicable to fixed a

3、nd floating offshore structures as well as drilling units. These Guidance Notes provide recommendations and best practices for standard specifications of certain electrical and instrumentation components thus improving cost efficiency (i.e., design man-hours, operation and maintenance costs), and in

4、creasing predictability of operation without compromising quality and safety in offshore structures and units. The recommendations in these Guidance Notes are based on industrial experiences, project experience, shipyard practices, manufacturers data sheets, national regulations, international stand

5、ards, and ABS Rules. These Guidance Notes become effective on the first day of the month of publication. Users are advised to check periodically on the ABS website www.eagle.org to verify that this version of these Guidance Notes is the most current. We welcome your feedback. Comments or suggestions

6、 can be sent electronically by email to rsdeagle.org. Terms of Use The information presented herein is intended solely to assist the reader in the methodologies and/or techniques discussed. These Guidance Notes do not and cannot replace the analysis and/or advice of a qualified professional. It is t

7、he responsibility of the reader to perform their own assessment and obtain professional advice. Information contained herein is considered to be pertinent at the time of publication, but may be invalidated as a result of subsequent legislations, regulations, standards, methods, and/or more updated i

8、nformation and the reader assumes full responsibility for compliance. This publication may not be copied or redistributed in part or in whole without prior written consent from ABS. ii ABSGUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY .2018 Table of Contents GUIDANCE NOT

9、ES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY FOR OFFSHORE APPLICATION CONTENTS SECTION 1 General 5 1 Background . 5 3 Scope and Application 5 5 Instrument Junction Box . 5 7 Metal Cable Tray . 6 9 Abbreviations 6 SECTION 2 Instrument Junction Box . 8 1 Scope 8 3 Material and Grade

10、s . 8 3.1 Material 8 3.3 Installation in Hazardous Zone 8 3.5 Ingress Protection Rating 9 5 Type of Terminal . 10 7 Cable Entry Directions 10 9 Cable Entry Device . 10 11 Earthing . 10 13 Temperature Class and Gas Group 10 15 Drain or Breather Plug 10 17 Junction Box Size . 11 19 Terminal Block Back

11、 plate 11 21 Labels 11 23 Door 11 25 Ambient Temperature . 11 27 Safety and Risk for Junction Box 12 TABLE 1 Installation in Hazardous Zone (API 14FZ) . 9 TABLE 2 IP Ratings for Junction Box . 10 TABLE 3 Instrument Junction Box Dimensions . 11 TABLE 4 Risk Assessment, Consequence and Mitigation for

12、Junction Box 12 ABSGUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY .2018 iii SECTION 3 Metal (Straight) Cable Tray 13 1 Scope 13 3 Material . 13 3.1 Stainless Steel SS316L . 13 3.3 Hot-Dip Galvanized (HDG) Steel SS400 . 13 5 Dimensions . 13 7 Classification . 14 9 Testing

13、 14 11 Finishing Material 14 13 Recommended Design of Ladder and Perforated Cable Tray . 14 15 Risk and Safety for Cable Tray . 16 TABLE 1 Risk Assessment, Consequences and Mitigation for Cable Trays . 16 FIGURE 1 Ladder Type Cable Tray . 15 FIGURE 2 Perforated Type Cable Tray 15 APPENDIX 1 Referenc

14、es 17 iv ABSGUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY .2018 Section 1: General SECTION 1 General 1 Background These Guidance Notes have been developed to provide shipyards, designers, owners and operators with practical guidance on the design and construction of spe

15、cific electrical and instrumentation (E equivalent to NEC NFPA-78 Electrical Standards for Industrial machinery NORSOK E001, Electrical, Instrumentation and Telecommunication Installation OSHA Fact Sheet - Electrical Safety Hazards of Overloading Standard Cable Trays & 29 CFR 1910.305(a) (3) UL 50 Enclosures for Electrical Equipment, Non-Environmental Considerations 18 ABSGUIDANCE NOTES ON RECOMMENDED SPECIFICATIONS OF JUNCTION BOX AND CABLE TRAY .2018