Optical fibre cabling provides a high performance communications pathway whose characteristics can be degraded by inadequate installation. This technical report provides guidance to assist the user and installer with regard to the general aspects of the installation of optical fibre cables covered by the IEC 60794 series of specifications, and the particular aspects of the ‘blowing’ technique.<\/p>\n
Optical fibre cables are designed so that normal installation practices and equipment can be used wherever possible. They do, however, generally have a strain limit rather lower than metallic conductor cables and, in some circumstances, special care and arrangements may be needed to ensure successful installation.<\/p>\n
It is important to pay particular attention to the cable manufacturer’s recommendations and stated physical limitations and not exceed the given cable tensile load rating for a particular cable. Damage caused by overloading during installation may not be immediately apparent but can lead to failure later in its service life.<\/p>\n
This guide does not supersede the additional relevant standards and requirements applicable to certain hazardous environments, e.g. electricity supply and railways.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Installation planning 3.1 Installation specification 3.2 Route considerations <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.3 Cable installation tension considerations 3.4 Cable tension predictions \u2013 duct installations <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3.5 Maximum cable tension <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figures Figure 1 \u2013 Cable tension calculations (equations. 1 through 3) Tables Table 1 \u2013 Calculation for total tension <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Figure 2 \u2013 Cable tension calculations (equations. 4 through 9) Table 2 \u2013 Calculation for pulling force in Figure 2 <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Table 3 \u2013 Calculation for pushing force in Figure 2 <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Table 4 \u2013 Calculation for blowing force in Figure 2 <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 3.6 Installation temperature Figure 3 \u2013 Cable tension calculations; Series1\u00a0=\u00a0blowing; Series2\u00a0=\u00a0pushing; Series3\u00a0=\u00a0pulling <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 3.7 Information and training 4 Cable installation methods 4.1 General considerations 4.2 Safety in confined spaces 4.3 Pre-installation procedures <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.4 Installation of optical cables in underground ducts <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 4.5 Installation of aerial optical cables Figure 4 \u2013 Optical fibre cabling in an underground duct <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 4.6 Installation of buried cable Figure 5 \u2013 Aerial cable installation <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 5 \u2013 Minimum installation depths <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 4.7 Installation in special situations <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 4.8 Installation of indoor cables 4.9 Blown systems <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 4.10 Cable location 5 Lightning protection Figure 6 \u2013 Cable installation by cascade blowing <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Optical fibre cables. Guide to the installation of optical fibre cables<\/b><\/p>\n |