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
6.1 Introduction to Closures for Blown Fibre Installations
The appropriate closures for the installation will have been selected at the Design stage.
Some closures are re-openable, either with screws or clips. Not all closures ‘below ground level’ are designed to be water-tight or gas-tight, since this
costs more. If the contents of the closure are resistant to water or gas contact, then a high-rated closure is not necessary.
The sealing performance is usually rated on the EN 60529 International Protection Scale (I.P.Rating)
When installing a water-tight closure, be sure to follow the correct installation procedure, or water-tightness may not be achieved.
6 Closures And Their Selection
FOREIGN OBJECTS & DUST
WATER
level
defi nition
1
st
2
nd
level
defi nition
not protected
no test
0
0
not protected
no test
protected against solid
foreign objects of
Ø
50mm
and greater
The object probe, sphere of
diameter 50mm shall not
fully penetrate
1
1
protected against vertically
falling water drops
vertically falling drops shall
have no harmful effects
protected against solid
foreign objects of
Ø
12.5mm
and greater
The object probe, sphere of
diameter 12.5mm shall not
fully penetrate
2
2
protected against vertically
falling water drops when the
enclosure is tilted up to 15°
vertically falling drops shall
have no harmful effects
when the enclosure is tilted
at any angle up to 15° on
either side of the vertical
protected against solid
foreign objects of
Ø
2.5mm
and greater
The object probe, sphere of
diameter 2.5mm shall not
penetrate at all
3
3
protected against spraying
water
water sprayed at an angle up
to 60° each side of vertical
shall have no harmful effects
protected against solid
foreign objects of
Ø
1.0mm
and greater
The object probe, sphere of
diameter 1.0mm shall not
penetrate at all
4
4
protected against splashed
water
water splashed against the
enclosure from any direction
shall have no harmful effects
dust-protected
ingress of dust is not totally
prevented, but dust shall not
penetrate in a quantity to
interfere with satisfactory
operation of the apparatus
or to impair safety
5
5
protection against water jets
water projected in jets
against the enclosure from
any direction shall have no
harmful effects
dust-tight
no ingress of dust
6
6
protection against powered
water jets
water projected in powerful
jets against the enclosure
from any direction shall have
no harmful effects
7
protected against the effects
of temporary immersion in
water
ingress of water in quantities
causing harmful effects shall
not be possible when enclo-
sure is temporarily immersed
in water under standardised
conditions of pressure and time
8
protected against the effects
of continuous
immersion in water
ingress of water in quanti-
ties causing harmful effects
shall not be possible when
enclosure is continuously
immersed in water under
conditions which shall be
agreed between user and
manufacturer, but which are
more severe than for #7
EG IP 65 RATING MEANS DUST-TIGHT, AND RESISTANT TO WATER-JETS
“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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