Bathroom
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Bathroom Light Information

Technical Bathroom Lighting Information

zonesThe following bathroom lighting information is a guide to help you understand what bathroom lights can be placed where in your bathroom. This is not an installation guide and reference should be made to the IEE Wiring Regulations (17th Edition) or a qualified electrician.

Firstly it is important to understand the rating by which bathroom lights are classified. IP rating stands for "Ingress Protection" and is always followed by two characters. These two numbers refer to the level of protection and it is important that you choose fittings with the correct rating according to where they are to be sited within the bathroom.

The diagram shows a bathroom split into four clear zones: 0, 1, 2 and 3*.

Zone 0 Bathroom Lights are for the inside of the bath or shower tray itself. Any fitting used in this zone must be low voltage, (max 12v) and be rated at least IPx7.

Zone 1 Bathroom Lights can be used in the area above the bath or shower to a height of 2.25m from the floor. In this zone a minimum rating of IPx4 is required. If the fitting is 240v a 30ma residual current device (RCD) must also be used to protect the circuit in this zone.

Zone 2 Bathroom Lights can be used in an area stretching 0.6m outside the perimeter of zone 1 to a height of 2.25 from the floor, the area within 0.6m of the basin and inside the window reveal. In this zone IP rating of at least IPx4 is required.

*Zone 3 Bathroom Lights This Zone Has Now been Withdrawn From the 17th Edition of the regulations.

In addition to the above, if there is a likelihood of water jets being used for cleaning purpose in zones 1 and 2 a fitting rated a minimum IPx5 must be used.

IP Explanation and Ratings
EN 60529 outlines an international classification system for the sealing effectiveness of enclosures of electrical equipment against the intrusion into the equipment of foreign bodies (i.e. tools, dust, fingers) and moisture. This classification system utilizes the letters "IP" ("Ingress Protection") followed by two or three digits. (A third digit is sometimes used. An "x" is used for one of the digits if there is only one class of protection; i.e. IPX4 which addresses moisture resistance only.)

Degrees of Protection - First Digit
The first digit of the IP code indicates the degree that persons are protected against contact with moving parts (other than smooth rotating shafts, etc.) and the degree that equipment is protected against solid foreign bodies intruding into an enclosure.


Degrees of Protection - Second Digit
The second digit indicates the degree of protection of the equipment inside the enclosure against the harmful entry of various forms of moisture (e.g. dripping, spraying, submersion, etc.)

Protection Against Solid Objects & Dust

Protection Against Fluids

First Number

Description / Test

Second Number

Description / Test

0

No Protection

0

No Protection

1

Protection against solid objects greater than 50mm in diameter, e.g. accidental touch by hands

1

Protection against vertically falling drops of water

2

Protection against solid objects greater than 80mm in length and 12mm in diameter, e.g. fingers

2

Protection against direct sprays of water up to 15 degrees from the vertical.

3

Protection against solid objects over 2.5mm in diameter, e.g. tools / wires.

3

Protection against sprays to 60 degrees from the vertical.

4

Protection against solid objects over 1mm in diameter, e.g. tools / wires.

4

Protection against water sprayed from all directions - limited ingress permitted.

5

Protection against dust - limited ingress (no harmful deposit).

5

Protection against low pressure jets of water from all direction - limited ingress permitted.

6

Totally protected against dust.

6

Protection against strong jets of water, e.g. for use on ship decks - limited ingress permitted.

7

Protection against the effects of immersion between 15cm and 1m.

8

Protection against long periods of immersion under pressure.


Full details can be found in the latest copy of the IEE wiring regulations.

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