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
4 Indoor installations and LFH products
4.1 Building Entry
1. The duct may surface either outside the wall, or underneath the building (through the floor).
2. In either case, the space between the microduct assembly and the duct may be sealed with resin or equivalent sealant to prevent entry of gas or
water (especially the indoor entry).
3. Overhead drop will arrive on the outside wall, usually under the eaves, Microduct may then follow the wall down to the entry position.
4. Entry through the wall is normally via a Customer Lead In (CLI) box.
5. The hole drilled through the wall is usually lined with subduct to protect the m/ds.
6. Once inside the building, the m/ds should transition to internal LFH rated m/d, within 2 metres from the m/d assembly seal point. M/d interstices
and each individual m/d must be sealed to prevent gas ingress.
See also section 7.5 for gas-blocking advice
“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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