pg1_pg20.FH10 - page 319

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In the latest standards
SFS - EN 60529 4 1992
concerning the IP degrees of enclosure protection of electrical equipment there are some changes particularly with
regard to the testing and identification of protection against liquids. Up to the degree 6 the protection is understood to also cover the lower protection degrees. In
degrees higher than 6, each degree is to be tested separately and marked accordingly, e.g.
IP67 / IP66
IP Reference Chart
First number
Protection against solid objects
Protected against the
affects of immersion
between 15cm and 1m.
7
Second number
Protection against liquids
Third number
Protection against mechanical impact
TEST
No Protection
IP
ø
TEST
No Protection
IP
ø
TEST
No Protection
IP
ø
1
Protected against long
periods of immersion
under pressure.
8
Protected against
vertical drops of water.
Impact
0.225 joule
150g @ 15cm
Protected against solid
objects up to 50mm e.g.
accidental touch
by hands.
1
1
3
Protected against solid
objects over 2.5mm
e.g. tools, small wires.
3
Protected against direct
sprays of water up to
60
o
from the vertical.
Impact
0.50 joule
250g @ 20cm
3
4
Protected against solid
objects over 1mm
e.g. tools, small wires.
4
Protected against water
sprayed from all
directions - limited
ingress permitted.
Impact
2.00 joule
500g @ 40cm
5
5
Protected against low
pressure jets of water
from all directions -
limited ingress
permitted.
Protected against dust-
limited ingress
permitted (no harmful
deposit).
5
Impact
6.00 joule
1.5kg @ 40cm
7
6
Protected against
strong jets of water e.g.
for use on ship decks -
limited ingress
permitted.
Totally protected
against dust.
6
Impact
20.00 joule
5kg @ 40cm
9
2
Protected against solid
objects up to 12.5mm
e.g. fingers.
2
Protected against direct
sprays of water up to
15
o
from the vertical.
Impact
0.375 joule
250g @ 15cm
2
ceiling
recessed window -
zone 2
zone 2
zone 1
zone 0
0.6m
0.6m
2.25m
Zone 0
Zone 1
Zone 2
The interior of the bath or shower which
can hold water
IPX7
The area directly above Zone 0 limited
vertically to 2.25m above the bottom of the
bath or shower. Also 1.2m horizontally from
the centre of a shower outlet to the height
of outlet or 2.25m whichever is the higher
The area beyond Zones 0 and 1, 0-6m
horizontally and up to 2.25m vertically.
Zone 2 also includes any recessed window
with a sill next to the bath
IPX4 or better,
or SELV with the
transformer
located beyond
Zone 2
Zones Defined
Room containing bath/shower
The 17th Edition Wiring Regulations redefined the zones for electrical equipment in bathrooms and
must be used for installations designed after 30th June 2008.
Protection
All electrical circuits within
bathrooms must be protected
by Residual Current Devices
(RCD) not exceeding 30mA.
This applies to all electrical
equipment whether it is
controlled by a switch in the
bathroom or remotely switched.
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