T 7 0 s i
4
ELECTRICAL REQUIREMENTS
WARNING
THIS APPLIANCE MUST BE EARTHED
The installation, supply cable and circuit
protection must conform with IEE wiring
regulations and be sufficient for the
amperage required.
The following notes are for guidance only:
1
The shower must only be connected to a
230-240V ac supply. If you are installing a shower
with a kilowatt rating above 9kW, it is advisable
to contact the local electricity supply company.
1.1
The electrical rating of the shower is shown
on the rating label
(fig.2)
within the unit.
Meter
Incoming
supply
fuse
Meter
tails
Consumer
unit
Pull cord
isolating switch
Shower
unit
Fuse or
mcb
RCD
(can be part of
consumer unit)
80A or 100A
main switch
Fig.3
schematic of installation circuit
2
Before making any sort of electrical
connection within the installation, ensure that no
terminal is live. If in any doubt, switch off the
whole installation at the consumer unit.
3
The shower must be connected to its own
independent electrical circuit. IT MUST NOT be
connected to a ring main, spur, socket outlet,
lighting circuit or cooker circuit.
3.1
The electrical supply must be adequate for
the loading of the unit and existing circuits.
4
Check your consumer unit (main fuse box)
has a main switch rating of 80A or above and that
it has a spare fuse way which will take the fuse or
mcb necessary for the shower
(fig.3)
.
4.1
If your consumer unit has a rating below
80A or if there is no spare fuse way, then the
installation will not be straight forward and may
require a new consumer unit serving the house or
just the shower.
4.2
You will need to contact the local electricity
company. They will check the circuit and carry out
what is necessary. They will also check the main
bonding.
5
The earth continuity conductor of the
electrical installation must be effectively
connected electrically to all exposed metal parts of
other appliances and services in the room in
which the shower is to be installed, to conform to
current IEE regulations.
Table A
CIRCUIT PROTECTION
unit
cartridge
rating
mcb
fuse
7.0kW
30/32A
30A
7.5kW
32A
35A
8.0kW
40A
35A
8.5kW
40A
45A
9.0kW
40A
45A
9.5kW
40/45A
45A
10.5kW
45A
45A
Fig.2
