Bristan Bliss series Installation Instructions And User Manual page 8

Electrical Requirements
It is a requirement that a residual current device (RCD)
formerly known as an earth leakage circuit breaker (ELCB)
with a tripping current of 30mA, is incorporated in the
circuit. This may be part of the existing consumer unit or a
separate unit.
For close circuit protection DO NOT use a rewireable fuse.
Instead use a suitably rated Miniature Circuit Breaker (MCB)
or Cartridge Fuse. Please refer to the Circuit Protection
Table.
Circuit Protection Table
Unit Rating (@
240V)
8.5kW
9.5kW
10.5kW
The current carrying capacity of the cable must be at least
that of the shower Circuit Protection Device.
Please refer to the Cable Current Carrying Capacity Table.
Cable Current Carrying Capacity Table
(for Twin and Earth PVC Insulated Cable)
Current Carrying Capacity
In an insulated
wall
6mm²
32A
10mm²
43A
Note: Cable selection is dependant on derating factors
On installation of the appliance the impedance measurement
of the Neutral and Earth back to the supply source is to be
less than 1.0 Ohms. This is in line with the general installation
requirements of the UK Network and will generally present
no problem within the UK Network.
In domestic installations you must ensure that the electrical
supply and existing fuse board are adequately rated.
Do not turn on the electrical supply until the plumbing has
been completed and the shower cover re-fitted.
Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.
8
Circuit Protection Device
MCB Cartridge Fuse
40A
40/45A
45A
In conduit or Clipped direct or
trunking buried in a non
insulated wall
6mm² 6mm²
38A 46A
10mm² 10mm²
52A 63A
45A
45A
45A