so i've come to a customer's property today they're having a bathroom renovation as you
can see um we're here to do the electrical work so we're here to put in down lighters and we're
here to do the extraction unit as you can probably see by the light there second fix now so i thought
it was a good opportunity really for a video to sort of discuss what we have to take into
consideration as electricians in a bathroom or a special location as such so we're gonna look
at the zones so zone zero zone one and zone two what sort of equipment we can fit in them zones
and the measurements that them zones take up so first of all we come to zone zero okay the danger
zone as such so zone zero in this instance here is actually all of this area inside of the bar
okay so up to the edge of this bath anywhere there is zone zero now generally in a domestic dwelling
we're not really going to be fitting anything inside zone zero we may get that in swimming
pools etc we would need to look in BS7671 for the the Regulations to go with that but according to
the Onsite Guide if we was to install in zone zero okay it must be a minimum IP rating of IPX7
okay and it must either be 12 volts AC maximum or 30 volts DC now as you notice there's no
bath panel here okay so at the minute this would be classed as zone one in a bathroom
okay because there's no bath panel here if we did put a bath panel here it wasn't accessible
without the use of a tool okay it would still be classed as zone one
however if it was a bath panel that you would require a tool to get into
we would then class this as outside of the zones okay so remember zone zero here
under the bathtub if we can get to it without the use of at all it's zone one and we'll talk
about zone one and where that extends to it as well in a minute however if we have
a panel here that we need a tool to access then this would be classed as outside of the zones
therefore we may be able to install whirlpool motors etcetera so carrying on from what we were
talking about regarding zone one under the bathtub we're now gonna look at where zone one actually
extends to in this area okay so zone one actually extends from the floor to 2.25 meters okay
on the edge of zone zero so zone zero being in the bath so from the edge of this bath
from the floor 2.25 meters high okay and that will be classed as zone one
so if we look the ceiling is actually around 2.65 meters
so anything above 2.25 meters in this scenario would be classed as outside of the zones
and below 2.25 meters will be classed as zone 1 now if i had like a shower and a waterfall head
okay then zone one could extend to above that if that was above
2.25 meters we would actually extend zone one past that waterfall fixed shower outlet and some of the
accessories we would actually install okay or pieces of equipment we'd install in zone
one would potentially be showers etc they must all have a minimum IP rating of at least IPX4
or if there's water jets present they must be IPX5 now you get a lot of conversation saying
well electric showers they're water jets there's not many electric showers i've installed that i
would class of jets of water okay they normally just trickle onto your head okay so still IPX4
and that would be the minimum requirement of installing anything like that
in zone one of a bathroom so now we've talked about zone one we're going to look at zone two
now this is the last zone as such so zone two actually extends from zone one by six
hundred millimetres okay so if zone one being the edge of the bath two point two five meters high
i would measure 600 millimetres and that would be the edge of zone two okay now accessories except
i can go in zone two again is IPX4 the same as zone one IPX5 if jets of water are present but
general rules apply with this according to the On-site Guide so this would be 600 mil
this side 600 mil the other side and it extends the full length as such or height of zone one
so 600 mil all the way around so now we've sort of explored the zones okay and we understand the
measurements of the zones now we can maybe talk about some other little aspects of it so again
30 milliamp protection additional protection via an RCDs generally needed now where a circuit is
supplying or running through the zone of a special location okay it's generally something we've moved
towards now with all circuits being RCD protected especially in a domestic dwelling however there
is still the use of supplementary bonding in some properties and we'll go into that in another video
also it's important to know that from the edge of zone one okay a socket outlet can now be mounted
this is a change in amendment two can now be located 2.5 meters okay it used to be three meters
they've now decided that it can now be 2.5 meters so really now we've looked at the zones
for a bathtub okay so zone zero zone one and zone two there are other aspects that we need to take
account to if we maybe don't have a bathtub we'll look at them in later videos such as shower trays
airing cupboards what they sort of do to the zones inside the bathroom in this bathroom
we've actually installed IP65 down lights it's technically outside of the zones however the
downloads we've installed have been IP65 so just remember the equipment you're going to be
installing bathrooms generally is going to have some sort of IP rating and remember that second
letter or numeral is in relation to the ingress of moisture as always we hope this video is