The following list provides an overview of the main changes within the 18th edition iet wiring regulations publishing 2 july 2018.
Bathroom lighting zones 18th edition.
Lighting in the bathroom is important.
This section contains only minor changes including modifications to regulation 715 524 201.
Any fitting used in this zone must be low voltage max 12v and be rated at least ip67 which is total immersion proof.
Zone 0 is the area inside the bathtub.
Selv with the transformer located beyond zone 2.
Bathroom lighting lighting needs to be functional but can also be adaptable for mood setting.
Bathroom zones are areas where electrical equipment must offer a certain degree of protection against water.
Zone 0 is defined as any area in a bathroom that can hold water.
There are 3 bathroom zones that have been identified by the 18th edition iet wiring regulations and all applicable british standards.
Shown green in the diagram.
Zone 2 extends horizontally 60cm from the edge of zone 1 shown pink in the diagram.
When thinking about lighting for your bathroom it is important to think about the below bathroom zones to ensure the lighting you want can be installed in your desired location.
Regulations are very strict as to which lights you are able to use in a bathroom and to complicate matters bathrooms have different zones which determine what type of light you may use within that zone.
The bathroom zone number refers to the amount of water likely to be present.
If there is a likelihood of water jets being used for cleaning purposes a minimum of ipx5 is required.
If installed more than 0 6 m from the edge of a shower basin or bath outside the zones no special fitting is required but the luminaire must be of a suitable design for the conditions.
The lower the zone number the higher the ip rating needs to be.
For make up application and shaving it s best to have a bright light but if relaxing for a soak in the tub you ll want to be sure you can dim the lights.
Zone 1 for a shower room is 2 25m.
These areas must have a particular.
Zone 1 is the area directly above the bathtub to a height of 2 25m above floor level yellow in the diagram.
According to the iet 18th edition wiring regulations section 701 it is necessary to install ventilation products that meet a minimum of ipx4 in zones 1 and 2 of a bathroom.
Why do bathroom lights have an ip rating.
Wall lights look better if they are hard wired into the wall with tiles laid over the top.
Section 715 extra low voltage lighting installations.
This means that when installed correctly the product should prevent ingress of water and remain safe for use without the potential to cause harm to the end user i e.
This means that you can install a 230 v light fitting above a shower or bath as long as they have a rating of at least ipx4 i e.
Zone 1 for a bathroom is the same width as zone 0 the width of the bath extending to 2 25m above the finished floor level.
The circuit in this zone i e.
Note this is measured from the floor level not the interior of the bath.
