CONNECTING BLOCKS,JACKS, AND PLUGS

Transcription

1 BEII. SYSTEM PRACTICES Stqtion Operotions Monuql Wiring sectron c23.o4l lssue l, July, 1956 AT&TCo Stqndqrd CONNECTING BLOCKS,JACKS, AND PLUGS I.OO INTRODUCTION This section covers the identification, installation, fasteners, and connections for connecting blocks and jacks, and the termination of wire and cable thereon. It also includes the identification of plugs used with jacks. 2.OO GENERAT Termination and dressing of cord conductors on connecting blocks and in plugs are covered in the C series of Bell System Practices governinstallation of telephone ing the sets. 3.OO CONNECTING BTOCKS - IDENTIFICATION AND USE 3.Ot Connecting blocks are used for making connections between wires and/ot cables and between wires or cables and conductors of telephone set cords. 3.O2 Table A provides information on the selection, identification, and use of connecting blocks. 4.OO CONNECTING BTOCKS_TERMINATIONS AND CONNECTIONS 4.01 Terminations of cables, wires, and cords are shown in Fig. l. foio lo*orcron 'or I THIRD WIRE + SECOND wlre+ prnsr lvrne: Frc. I-CONNECTING Br-OC6S-TERMTNATTONS t- Copyright, 1956, by American Telephone and Telegraph Company Printed in U.S.A. Poge I

2 .o g (g o 19 TABI.E A Selection, ldentificotion, ond Use of Connecting Blocks l/! l t ft =oz Principol Use Type of Mounling No. of Conduclors TyPe Cover Color Blocks Shown in Figs. Fu rn ished with Associoted Equipmenl (Order if Required) Covers Bqckboords Brqcket o l 9! o $ Keyless (Regular) Telephone Sets and Bridging of Wire Flush Nonflush 4 42A, 2, 3, 4, and 5 7 Cover 168A 43A ' 8 Cover 1684 Key Telephone Sets and Bridging of Wire and Cablesfnside Wiring ancl Lead Nonflush 10 44A Two 44A Blocks Three,[4A Blocks fvory (-4) Similar to Fig. 9 Similar to Fig. 9 Similar to Fig A 101C 168A t68b 10lC Four 44A Blocks 9 r01d 168c 50 Five 44A Blocks Similar to Fig. 9 Two 10lC Covers Two 1688 Backboards Terminations At Remote Pick-up Points and Bridging of Wire Nonflush 2 3 l1a No Cover 6 l Black b Cover 1684' 11c Black 6 t2c L2E t2d t2i. No Cover 6 Black 6 Insulated Cover Cord Stay Hook Cover Cord Stay Hook l68a 168A 168A

3 secilon c O2 Connections are made at used with 4- and 6-button as follows: connecting blocks key telephone sets Stqtion Wire TABTE B Terminol Designolions for Connecling Blocks For Key Telephone Sets Used Wirh la ond IAI Key Telephone Syslems, see the C series of Bell System Practices governing the connections of 1A and 1A1 key telephone systems. Type Triple Conduclor Color B, Red 1 Red Green 2 Green For key telephone sets used with 755.{ PBXs, see the C series of Bell System Practices governing connections of key telephone sets at 755A PBXs. Paired Yellow 4 Red 5 Yellow Green 6 Black *Designation not shown. IJse screw which supports cord stay hook, Add necessary washers. 4.O3 Connections are made at connecting blocks used with turn button telephone sets, keyless telephone sets, and for bridging cables or wires as follows: o For ll-type connecting block, mounted with arrows horizontal, connect green conductor to top terminal and red conductor to bottom terminal (see Fig. 6). For l2-type connecting block, mounted with arrows horizontal, connect green conductor, red conductor, and yellow conductor to top terminal, middle terminal, and bottom terminal, respectively (see Fig. 6). o The 44A connecting blocks are used for connecting a maximum of ten conductors as indicated in Table C. CorD Inside Wiring Coble Conduclor Color Blue TABTE C Connecting Block Terminsl Number White 2 Orange 4 I White 5 For all 4-conductor connecting blocks, connections should be as indicated by the color designations stamped adjacent to the terminals. The red wire should be connected to the terminal designation R, etc. Green 6 White 7 Brown 9 White 10 The 44A and 47F3 connecting blocks are used for connecting five conductors as indicated in Table B. Slate White 8 J Poge 3

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7 l-- SECT ON C23.Ut TABTE D Fosleners for Connecling Blocks qnd Bqckboqrds Equipment Surfoce Fqsleners Hardwood 3/4 in., No. 8 RH Blued Wood Screws. Connecting Block Backboard All Wood (Except Above) Lath and Plaster Metal (Desk or Paneling) 5/8 in., No. 8 RH Blued Wood Screws. I in.. No. 8 RH Blued Wood Screws. 2 in., No. 8 RH Blued Wood Screws. 5/8 in., No. 8 RH Self-tapping Screws. Masonry - Plastered 2 in.. No. 8 RH Blued Wood Screws in 6-8 x I-l/2 in. Screw Anchors, Backboard Masonry - Unfinished Hollow Tile and Similar Surfaces I-l/4 in.. No. 8 RH Blued Wood Screws in 6-8 x 3/4 in. Screw Anchors. 1/8 in. x 4 in., RS Toggle Bolts. Metal Desks (Where More than One Block Is to Be Mounted) 5/8 in., No. RH Self-tapping Screws. 7.OO JACK AND PIUG SYSTEMS_REQUIREMENTS 7.Ol All telephone instruments used with jack and plug systems may be portable. However, at least one ringer must be permanently connected to the line. 7.O2 Hand telephone sets (those requiring a subset) and telephone sets should not be used together in the same jack and plug system, 7.O3 Jack mounting should be uniform so that plug insertion will be the same throughout the customer's premises. 8.OO JACKS AND PTUGS _ IDENTIFICAIION AND USE 8.Ol Jacks and plugs permit one or more telephone sets to be used at one or more locations. They also permit the rapid disconnection and reconnection of telephone service to ships, boats, trains, etc Table E provides information on the selection, identification, and use of jacks. Page 7

8 -1! o (a o ql Principol Use Locqlion Type of Mounling No. of Conduclors TABTE E Jocks Type Color Jtrck Shown in Fis. Quonlity Furnished wirh Equipmenl vf m c = o z f) N qt b A Baseboard 4 493A l6 2 Self-tapping Screws I 493A Jack Fiush Outlet Box 4 497A' 14 I I 43-Type Bracket Coverplate Inside Buildings 4 Metal Screws I Flush Coverplate Portable Telephone Sets Baseboard or Outlet Box 8 391A 15 Mounting Screws 'Washers Nonflush 4 404B 8 392A. 19 t Wood Screws 20 I Metal Cover Patios, Terraces, Breezeways, Porches Nonflush 4 KS List I 4 KS List 2 Aluminum 23 1 Aluminum A Jack (Modified) Aluminum Housing with Hinged Cover Aluminum Housing with Hinged Cover Fixed Locations for Ships, Boats, Trains, etc Outdoors at Ships, Boats, Wharves, Trains, etc Flush KS-8420 Brass 18 I Cover Nonffush KS-8421 Brass 2+ I Cover ))

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