Introduction
Bathrooms and showers rooms are areas of high risk, because of the very low resistance of the human body when wet or immersed in water.
Because of the risk of electric hazard, rigorous and severe regulation and standards have been edited.
The relevant standard is IEC 60364-7-701.
Three aspects have to be taken in account when designing an electrical installation in the bathroom:
The definition of zones, numbered 0,1, 2, 3 in which the placement (or exclusion) of any electrical device is strictly limited or forbidden and, where permitted, the electrical and mechanical protection is prescribed
The establishment of an equipotential bond between all exposed and extraneous metal parts in the zones concerned
The strict adherence to the requirements prescribed for each particular zones.
