Kohler Thermostatic Electric Shower manual Electrical

2. Electrical

In a domestic installation, the rating of the electricity supplier’s fuse and the consumer unit must be adequate for the additional demand. All Mira electric showers are high power units, it is essential to contact your electricity supplier to ensure that the supply is adequate for the product. Voltage drop due to local heavy demand will reduce the shower’s performance.

The appliance must be earthed by connecting the supply-cable earth conductor to the earth terminal.

Supplementary bonding: Within the bathroom or shower room, all

accessible conductive parts of electrical equipment and extraneous

conductive parts (metal parts) that are likely to introduce earth potential, must be electrically bonded to earth using a minimum cable size of 4.0mm2 if the cable is not mechanically protected, (2.5 mm2 if mechanically protected).

The minimum cable size (cross-sectional area) required should be in accordance with BS 7671.

As a guide only, and in accordance with BS 7671 we recommend close circuit protection: i.e. 9.8 kW = 45 Amp

It is strongly recommended that a 30 mA Residual Current Device (RCD) is included in the electrical circuit. This may be part of the consumer unit or a separate unit.

A separate, permanently connected supply must be taken from the consumer unit to the appliance through a double-pole switch, which has at least 3 mm of contact separation. The switch can be a ceiling mounted pullcord type within the shower room, or a wall mounted switch in an adjacent room.

DO NOT twist the individual cable cores of either the live or neutral conductors, as this will prevent them from entering the terminal block.

DO NOT exert strain on the terminal block. Ensure that the electrical

connections are tightly screwed down.

DO NOT turn-on the electrical supply until the plumbing has been completed.

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