I N N O V A T I O N A N D F L E X I B I L I T Y
T H E
I N S T A L L A T I O N A N D M A I N T E N A N C E T R A I N I N G M A N U A L
3 Outdoor Installation
3.1 Tight Protected Microduct (TPM)
The protected microduct is the heart of the
system. The polyethylene tubing is used as a fibre pathway, providing enhanced performance
when used for fibre blowing. Microducts are bundled untwisted in various combinations to give product assemblies for installation into the network.
All microducts (m/d) are suitable for use with standard push fit connectors, creating a totally modular system. Connections made like this can be buried
and forgotten, as FU will pass through them later. The ‘Standard’
system microducts have an outside diameter of 5mm and an inside
diameter of 3.5mm. Smaller ones are outside diameter 3mm and inside diameter 2.1mm. The construction of these bundles can be one of the following:
■
Direct Install (DI)
■
Direct Bury (DB)
■
Low Fire Hazard (LFH)
■
Plenum Rated (PL) (not 5mm or 3mm)
■
Metal Free Products (eg DBmf)
Emtelle can manufacture tube bundles using larger microduct sizes eg 10mm,12mm, and can also manufacture other type of sheathing for both the
standard microducts and the larger microducts. Other sheathing systems are:
■
Low Fire Hazard Reinforced (LFR)
■
Direct Bury Reinforced (DBR)
■
Direct Bury Termite Resistant (DBT)
■
Direct Bury Reinforced Termite Resistant (DBRT)
■
Aerial or outdoor deployment
■
Petrochemical Resistant
■
Anti-Tracking
2 The Last Mile
“This document is intended as a guide only. Whilst the information it contains is believed to be correct, Emtelle can take no responsibility for actions taken based on the information contained in this document. Emtelle reserves the
right to make changes to this document without notice. All sales of product are subject to Emtelle’s terms and conditions of sale only, which can be found on Emtelle’s website.”
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I N N O V A T I O N A N D F L E X I B I L I T Y
Installation of
Blown Fibre
Since blown fibre is based on the
later adding of fibres to a pre-
installed tube route, the installation
methods are rather different to
those for power or fibre cables. See
in the sketch how tube bundles
branch off BEFORE the customer
building, to permit smooth curving
routes for the travelling fibres.
Remember that installing the tube
bundles is not the last operation,
but that fibres have to be able to
negotiate the route the installer has
created. See section 3.8 for more
information.
Note:
Please refer to Installation Practice
Clause on Page 5.
