Electrical Connections - Redring PURE 8.5kW Installation And User Manual

9. Electrical Connections

The electrical installation must be in
accordance with the current BS 7671 (I.E.T.
wiring regulations) and part P of the building
and / or local regulations.
The shower unit is designed for a single phase
50 Hz a.c. electrical supply.
Electrical Specfications
Normal Power Rating at 240V
7.5kW - (40A MCB rating)
8.5kW - (40A MCB rating)
9.5kW - 40A MCB rating)
10.5kW - (45A MCB rating)
IMPORTANT: The heating elements on the
UK models are manufactured to 230-240V
specification and will give a lower kW rating if
the voltage supply is below 240V.
The shower unit must be permanently
connected to the electrical supply, direct from
the consumer unit via an electrical isolation
switch with a minimum contact gap of 3 mm.
The switch must be readily accessible and
clearly identifiable and sited out of reach of
a person using the shower over a fixed bath
or shower tray, unless the switch is pull cord
operated. The wiring must be connected to
the switch without the use of a plug or socket
outlet.
The supply cable size is determined by the kW
rating of the product (as detailed on the rating
plate fixed to the back plate) and the distance
between the shower and the consumer unit.
The table below is for guidance only but will
help you choose the correct cable for your
installation. If you are in any doubt consult an
electrician.
DIRECT ClLIPED Cable Run Guide
MINIMUM
KW NOMINAL RATING
RATING AT 240V ISOLATING
SWITCH
7.5 31.25amps 40amps
8.5 35.41amps 40amps
9.5 39.58amps 40amps
10.5 43.75amps 45amps
Ensure that the terminal block screws are fully tightened and that no cable insulation
is trapped under screws, and tighten periodically in accordance with BS 7671. The
earth continuity conductor of the electrical installation must be effectively connected
to all exposed metal parts of other appliances and services in the room in which the
Normal Power Rating at 230V
6.9kW - (40A MCB rating)
7.8kW - (40A MCB rating)
8.7kW - (40A MCB rating)
9.6kW - (45A MCB rating)
MAX CABLE
FUSE RUN
RATING
6mm²
40amps 29m
40amps 23m
40amps 21m
45amps 18m
IMPORTANT
shower unit is installed to conform with BS 7671.
1. The incoming cable should be hidden.
Connect as follows:
Earth cable to terminal marked
Neutral cable to terminal marked N
Live cable to terminal marked L
2. The outer sheath of the supply cable must
be stripped back to a suitable length and
the earth conductor must have an earthing
sleeve fitted.
3. Connect the cable to the terminal block.
Ensure that ALL the retaining screws are
VERY tight and that NO cable insulation
is trapped under the screws. Loose
connections can result in cable overheating.
IMPORTANT: Failure to ensure that the
retaining screws are VERY tight could result in
a failure of the terminal block.
IMPORTANT: DO NOT switch on the electricity
supply until the shower cover has been fitted.
IMPORTANT: Follow these
cut back cable guidelines,
N
L
to ensure the product has a
reliable electrical connection.
10mm²
48m
38m
32m
30m
Terminal
block
9