《NEMA-FG-1-1993.pdf》由会员分享，可在线阅读，更多相关《NEMA-FG-1-1993.pdf（23页珍藏版）》请在三一文库上搜索。
1、National Electrical Manufacturers Association 2101 L Street, N.W. Suite 300 Washington, D.C. 20037 (202) 457-8400 Fax (202) 457-8411 TO: All holders of FG 1-1993 FROM: NEMA Communications Director R E : Revision 1 to FG 1-1993 DATE: 13 February, 1995 Enclosed please find revision 1 to FG 1-1993. The
2、 old pages in your FG 1 should be removed and replaced w i t h the corresponding pages included here to bring your standard up to date. A list of effective pages has been included as a guide to which pages in your standard are the most up to date. A new title page has also been included, reflecting
3、your standards updated status. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- NEMA FG*l 93 6470
4、247 0505788 307 NEMA STANDARDS PUBLICATION NO. FG 1 NATIONAL ELECTRICAL MANUFACTURERS ASSOClATlON H 2 l O l L STREET, #W., WASHINGTON, D.C. 20037 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resa
5、le, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- NEMA Standards Publication No. FG 1-1993 FIBERGLASS CABLE TRAY SYSTEMS Revision No. 1, November, 1994 Published by National Electrical Manufacturers Association 2101 L Street, N.W. Washington, DC 20037
6、O1 994 by National Electrical Manufacturers Association Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IH
7、S -,-,- FG 1-1993, Revision 1 List of Effective Pages Pages with a revision numkr of O are originals. Pages with a revision number of 1 were altered i n revision 1. Page Number Table of Contents 1 2 3 4 5 6 1 Revision Number O O O O 1 O 1 O Page Number 7 8 9 10 11 12 13 14 15 Revision Number O O O O
8、 O O O O O Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- FG 1-1993 TABLE OF CONTENTS Foreword
9、. i Sc0 pe . i Section 1 REFERENCED STANDARDS AND DEFINITIONS . 1 Section 2 MANUFACTURING STANDARDS Materials . 3 Supplemental Finishes 3 Dimsio ns 3 Protection of Cable Insulation 3 Fittings 3 Working (Allowable) Laad Capacity 5 Load/Span C l a s s Designations 5 Effect of Temperature 5 Destruction
10、 Load Test 7 DeflectionTest 7 Data to Appear in Specifications . 9 Data to Appear on Drawings . 9 Installation 9 Deflection 11 Finings 11 supports . 11 supportLocations 11 Thermal Contraction and Expansion 12 Warning! Walkways . 12 Section 3 PERFORMANCE STANDARDS AND CLASS DESIGNATIONS Section 4 TES
11、T STANDARDS Section 5 SPECIFICATIONS AND DRAWINGS Section 6 APPLICATION INFOFWATION Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permi
12、tted without license from IHS -,-,- FG 1-1993 Page i FOREWORD This Standards Publication covers fiberglass cable tray systems. Its primary purpose is to encourage the manufacture and utilization of standardized fiberglass cable tray systems and to eliminate misunder- standings between manufacturers
13、and u s e r s . This Standards Publication provides technical require- ments concerning the construction, test, and pezformance of fiberglass cable tray systems. The development of this publication is the result of many years of research, investigation, and experience by the members of the Fiberglas
14、s Cable Tray Section of N E M A . Throughout the development of this publication, test methods and performance values have been related as closely as possible to end-use applications. Almost every item therein, when applied properly, contributes to safety in one way o r an- other. The manufacturer o
15、f fiberglass cable tray systems in accordance with this publication is, how- ever, only one factor in its safe u s e . Total safety involves the joint efforts of the various equipment manufacturers, the system designer, the installer, and the user. which are vital t o a safe installation: The fiberg
16、lass cable tray system manufacturer has l i m i t e d or no control over the following factors a . Environmental conditions b. System design c. Product selection and application d. Installation practices e. Maintenance of the system This Standards Publication has been promulgated with a view toward
17、promoting safety to persons and property by the proper selection and use of fiberglass cable tray systems. It has been developed through consultation among manufacturers and users, to result in improved serviceability, safety, and quality of fiberglass cable tray systems. This publication is in acco
18、rdance with applicable provisions of the 1993 National Electrical Code, Article 318. This publication will be periodically reviewed by the Fiberglass Cable Tray Section of NEMA for any revisions necessary to keep it up to date with advancing technology. Comments or recommended revisions are welcomed
19、 and should be submitted t o : V i c e President, Engineering Department National Electrical Manufacturers Association 2101 L Street, N.W., Suite 300 Washington, D.C. 20037-1526 SCOPE These standards cover continuous, complete fiberglass systems of ladder ventilated, solid-bottom ca- ble tray or cha
20、nnel type trays, intended for the support of power or control cables, or both. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted
21、without license from IHS -,-,- FG 1-1993 Page 1 Section 1 REFERENCED STANDARDS AND DEFINITIONS 1.1 REFERENCED STANDARDS The following publication is adopted, in whole or in part as indicated, by reference in this Standards Publication. American National Standards Institute (ANSI) 11 West 42nd SM New
22、 York, NY 10036 National Fire Protection Association (NFPA) Bamrymarch Park Quincy, MA 02269 A N S I P A 70-1993 National Electrical Code 1.2 DEFINITIONS 1.2.1 Fiberglass Cable Tray System A fiberglass cable tray system is an assembly of fiber- glass reinforced plastic cable tray sections and accces
23、so- ries, that forms a rigid structural system t o support cables. 1.2.2 a. b. C. 1.2.3 Fiberglass Cable Tray Types Ladder type A ladder type fiberglass cable tray is a prefabri- cated fiberglass structure consisting of two lon- gitudinal side rails connected by individual transverse members. Trough
24、 type A trough type fiberglass cable tray is a prefab ricated fiberglass structure with a ventilated or solid bottom within integral or separate longitu- dinal side rails. Channel type A channel t w cable tray is a pultruded fiber- glass channel consisting of a ventilated or solid bottom with integr
25、al side r a i l s . Cable Tray Section A fiberglass cable tray section is a single length of cable tray, either straight or formed as an elbow, tee, cross, and so forth. 1.2.4 Straight Section A straight section is a fiberglass cable tray section which has no change in direction. 1.2.5 Fittings Fibe
26、rglass cable tray fittings are sections which are joined to other cable tray sections for the purpose of changing the size or direction of the cable tray system. 1.2.6 Horizontal Elbow which changes direction in the same plane. 1.2.7 Vertical Elbow (Inside or Outside) which changes direction t o a d
27、ifferent plane. A horizontal elbow is a fiberglass cable tray section A vertical elbow is a fiberglass cable tray section a. Inside Vertical Elbow An inside vertical elbow changes direction up ward from the horizontal plane. An outside vertical elbow changes direction downward from the horizontal pl
28、ane. b. OutsiCie Vertical Elbow 1.2.8 Horizontal Tee A horizontal t e e is a fiberglas cable tray section which is suitable for pining cable tray sections in t h r e e direc- tions a t 9Odegree intervals in the same plane. 1.2.9 Horizontal Cross A horizontal cross is a fiberglass cable tray section
29、which is suitable for joining cable tray sections in four directions at %-degree intervals in the same plane. 1.2.10 Reducer (Straight, Right Hand, Left A reducer is a fiberglass cable tray section which is suitabIe for joining fiberglass cable tray sections of dif- ferent widths in the same plane.
30、A straight reducer has two symmetrical offset sides. A right-hand reducer, when viewed from the larger A left-hand reducer, when viewed from the larger end, Hand) end, has a straight side on the right. has a straight side on the left. Copyright National Electrical Manufacturers Association Provided
31、by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- FG 1-1993 Page 2 1.2.1 1 Connector A fiberglass cable tray connector is a device which joins fiberglass cable tra
32、y straight sections or fittings, o r both. The basic types of connectors a r e : a. Rigid b. Expansion c. Adjustable 1.2.12 Accessories Accessories are devices which are used to supplement the function of straight sections and fittings, and include such items as dropouts, covers, conduit adapters, h
33、old- down devices, adjustable connectors, dividers, and the like. 1.2.13 Supports A cable tray support is a device which provides de- quate means for supporting fiberglass cable tray straight sections o r fittings. The basic types of cable tray supports a r e : a . Cantilever bracket b. T r a p e z
34、e c. Individual rod suspension Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- FG 1-1 993, Revis
35、ion 1 Page 3 Section 2 MANUFACTURING STANDARDS 2.1 MATERIALS Fiberglass cable trays shall be made of fiberglass (fiber glass reinforced plastic shapes) which is flame retardant, ultraviolet light resistant and which utilizes a surfacing veil for added corrosion protection in accordance with the curr
36、ent edition of the National Electrical Code, Article 318. 2.2 SUPPLEMENTAL FINISHES compatible resin coating. 2 . 3 DIMENSIONS A l l edges with exposed glass shall be sealed with a a . Ladder-type trays 1. Lengths of Straight Sections20 feet 53/16 inch, not including connectors if attached 2 . Width
37、s-6, 12, 18, 24, 30, and 36 inches, W 4 inch inside dimension Overall widths shall not exceed inside widths by more than 4 inches 3. Depths-Inside depths shall be 3 through 7 inches, when consid- ering ap!plications requiring mncenltored slntic load, sec 6.2. NOTE 2 - ?hese designalicms do not apply
38、 to channel m y . and the manufacturer should be consulted. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license fro
39、m IHS -,-,- FG 1-1993 Page 6 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMALicensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 09:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- FG 1-1993 Page 7 Se
40、ction 4 TEST STANDARDS 4.1 DESTRUCTION LOAD TEST 4.1.1 Test Specimen For each design of fiberglass cable trays, two unspliced straight specimens of the widest width and 12 inches on center rung spacing shall be t e s t e d . Differences in configuration of any part constitute a different design. 4.1
41、.2 Type and Length of Span Test spans shall be simple beam spans with free unre- strained ends. Trays shall not have side restraints. Spans shall be as specified +1 inch. 4.1.3 Orientation of Specimens Specimens shall be tested in a horizontal position. The total length of the test specimen shall be
42、 not more than the specified span length plus 20 percent Any overhang shall be equal. 4.1.4 Supports Each end of the specimen shall be supported by a l/s-inch wide by %-inch high steel bar(s) with a 120 degree “Vee“ notch cut in its bottom to a depth of 3/16 inch. The “Vee“ notch shall rest on a 1-i
43、nch solid round steel bar which is welded at a maximum of 12 inches on center to a f m steel base. 4.1.5 Loading Material Loading material shall be rectangular steel bars, 3/4 inch by 4 inches by 12 inches with a theoretical weight of 10.2 lb. each or steel strips with a maximum thickness of 1/8 inc
44、h, width 1-1/8 inch, and length 4 feet When testing 12 foot spans or less. 4.1.6 Loading All specimens shall be loaded to destruction. The load shall be applied in at least 10 increments which are approximately equal. Loading shall be uniformly distributed for the length and breadth of the specimen
45、except that the loading material shall be not closer than ! 4 inch nor further than 1 inch from the innermost elements of the side rails. It shall be arranged across the tray with a minimum of 3/8 inch between stacks so that the loading material does not bridge transversely. A l l loading material s
46、hall be placed between the supports without overhanging. For loading weights in a ladder-type tray, it shall be permissible to cover the bottom of the tray between supports with a flat sheet of No. 9 gauge flattened ex- panded metal not more than 3 feet long and with a wire hole size of 3/4 inch, or
47、 a f l a t sheet of No. 16 gauge sheet steel not more than 3 feet long. The expanded metal or sheet steel shall not be fastened to the tray and shall be no closer than $5 inch to the side rails. The 3-foot lengths shall not overlap. 4.1.7 Destruction Load Capacity The total weight of the loading mat
48、erial on the fiber- glass cable tray at the time it is destroyed shall be con- sidered t o be the destruction load capacity of the cable tray. 4.1.8 Interpolation and Extrapolation of Test When allowable load and deflection data are deter- mined by load tests, values for span lengths not tested shall be determined by interpolation from a curve based on values for a minimum of three tested span lengths. Extrapolation toward shorter span lengths i