ML20094P205
| ML20094P205 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 02/19/1992 |
| From: | Kurtz E, Shoemaker T AFFILIATION NOT ASSIGNED |
| To: | |
| References | |
| CIVP-A-024, CIVP-A-24, NUDOCS 9204070282 | |
| Download: ML20094P205 (5) | |
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- The Linemar/s .
and Cableman's
#- . Handbook n _-- Edwin B. Kurtz, E.E., P.E., Ph.D.
"Y. #
(Deceased) Emeritus Professor of Electrical Engineering and
'p former Head of Department, The University of Iowa
( .- Formerly Member of the Educational Department. The Wisconsin Electric Power Company; Fellow, IEEE Fellow, AAAS; Member, ASEE g (- .)y N \$ % Thomas M. Shoemaker, P.E. B.S.E.E The University of lows; Manager, Distribution N Department, lawa lilinois Gas and Electric Company Ns Formerly Captain, Signal Corps, U.S. Army; Member N Transmission and Distribution Committee, Edison Ns x Electnc Institute; Senior Member, IEEE
\ \.ss
\\
s SIXTH EDITION
, s
\ 's N x'
N <t / eitch ce new pede Work ' ' mpleted
* $=< i-d a m - := McGraw-Hi8t Book Company New York St. Louis - San Francisco Auckland Bogoth Hrmburg Johannesburg London Madrid Mexico Montreal New Delhi Panama Paris S&o Paulo Singapore Sydney Tokyo Toronto
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w ISBN 0-07-035b78-5 m Ubrary of Congress Cataloging ir P2hcation Data Kurtt. Edwin Bema J. date. The lineman's and cableman's handbook. Includes index.
- 1. Electric !ines-Handbook A manuals, etc ,
- 2. Doctric cables-Handboo6 h, manuals, etc.
- 1. Shoemaker, Thomas M., dire, II. Titte.
TK3221.K83 1981 f #1.319'22 81 5945 AACR2 i g e : a Copyright C 14f *,1978,1964,1955 by McGesw+hh, inc. All rights reserved. Copyright (Kl8,1942 by McGraw Hill,Inc. All rights reserved. Cnpyright twwed 1970,1956 by Edwin B. Kurtz. Printed in the United Stater of Artweca. Ha part of this publication may be reproet cod, stored in a recrievt,t system, M transmitted, in any form or by any means, electronic, rpechanical, photocopying. recording, or otherwise, without the ,wtor wntten permission of the publisher, 234587890 KPI'.P 898765432 ISBN 0-07-035b78-5 The editors for this book were Haro6d B. Crawford and Margaret Lamb, the designer was B4aise Zito Studios, and the producten supervia wasTeresa F. Leaden. It was set in Caledorua by University maprucs. Inc. Printed and beund by The Kingsport Press. ,
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?MEM g/ Splicing Cable e . lack at puhng end (Cowt .v Muom md to signal a stop to prevent pulhng he top of the mr.nhole to relay signals
( smgle cable can beand O)enditwns dMty in greasmg properly and in puned incable sue. It isare Wluple lengths of cable are ,:mnected together to form a continuous length. These connections called pmts or sphces If underground ducts are used, the sphces are normally completed in per min, or h it per sec, is preferable a manhole. When a caw ts cut, in reparanon for spiscing or for any other reason, it must be les are pulled into one duct, the speed protected frorn moisture and dirt. Ca et. As esposed to the atmosphere will collect moisture and speed will prevent the pasabihty of contan,runon. The cable ends should be p.eperly sealed at all times except during the period when the sphce is being completed or the cable termiration is being installed. The cable ends ible, as the time required for orawing should be thoroughly inspected before they are trained into final ponnon for splicmg. smaD part of the total time needed to if the splices are to be completed in a manhole, the cables and the sphces should be supported on racks mounted on the manh. ole wall as illustrated in Section 29 The joint or sphce is supported up to the mani. ole rigging, the first between tv . brackets located on the central portion of the manhole wall Became of the expanston
! wailable in the manhole to reach and contraction of & cables, caused by changes in the caw temprature, it is necessary to pro -
, wrJ1, sdditional pullmg ts necessary. vide reverse curves or offset bends in the portion of the cable in the manhole. These reverse curves
; rip mu:t be apphed to the cable the enaW & cable to take up the expansion arv. icontraction movements without cracking or buck-asket" gnp (Fig 3M5) ts used This hng d the insulation or lead sheath. Therefore, the training d ceWs on the manhole wall is not )
to the destred posinon. Care must be only for making a neat arrangement in the manhole but more importantly for providmg the expannon space needed to absorb tb movements el the cable. he forw:rd end is placed on the caw In eneral, the bending radius R (see Fig. 33 l) of the reverse curas in lend < overed ca%s e esble into its final positwn. This will , must no less than eight times the overaD diameter d tk cable. Tlm. 4 San cable should havu ee that the seal at the en' of the cable t a muumtun becdmg radius of 24 in or more, and a 4-in cable should aave a minimum bendmg b enough slack lef t to train it properly 5 radius of 31in or more. e placed on its supports. and tk end { W range of values of R in terms of cable diameter varies F ~ to 12 and tepends on size reel ts also sealed. j and number of conductors and whether t is a polgthylene, t plastic, rubber , varnished.
. cambric , or paper-insulated cable, as well as on the rated voltag or the cable.
At f ast 6 in of straight cable shoidd extend beyond each end of the splice to provide space for restmg on tk saddles of the supporting racks The ebps holding the saddles on the bracket should be spread enough to permit the saddle to shde freely along the bracket. All cable and joints should be ao racked in the manhole that they are not directly under the manhole cover. TW exact makeup of a spha depends on tk spectSe cable construction, that is, whether the caw is a angle- or multiple conductor caw; whether the insulation is rubber, polyethylene, ther. moplasuc, varnished cambric, or impregnated paper; or whether th ceW insulation has a con-ducting shield; etc. The general imtallation procedure is emaar to thcee described in this section. The cable manufacturds specific instrucuens must be foPowed in all tnstances The worker must maintain took in good condition and keep them clean and dry. The working area and the area of the caw being worked on should k protected from mouture with a rubber blanket ce other waterproof material. The cable sphcer or hneman performing the work must maintain clean and dry hands 33 1 1
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