Bathroom Lighting Design Guide

Enlighten Safely My Bathroom

The bathroom is subject to specific safety requirements defined in the standard NF C 15-100 / A2. The latter, like many others, is constantly evolving. One thing is certain: it will not install any fixture in a bathroom and you do not put it anywhere. So do not put in danger and do not hesitate to ask for advice when you go into your lighting shop whether lighting selects appropriate to a bathroom.

Security: the golden rules

First, be aware that all circuits supplying a room containing a bath or shower must be protected by a high sensitivity differential switch (30 mA). So before doing anything towards your distribution panel. If you have any doubt or if you find that you do not have the correct circuit breaker, call an electrician.

As you can see from this drawing, the bathroom is divided into four volumes, each corresponding to specific rules for installing electrical equipment including LED lighting as described on REMZFAMILY. They define areas where electrical appliances are admitted or not. So the closer the main source of water (shower), more risks to personal safety and the greater safety rules are strict.

Volume 0 This zone corresponds to the inside of the shower and tub. All electrical equipment (hairdryer, razor, etc.) is prohibited. In principle, no light can be installed there. Today, however, some tubs are designed with integrated low voltage fixtures. In this case, make sure that your product meets the requirements of the legislation.
Volume 1 This zone corresponds to the space above the bath or shower to 2.25 m high. Only luminaires Class III , powered by 12V Safety Extra Low Voltage and protected against splash water (IPX4) can be accepted .  The transformer must be located outside the volume 1. Discover our lights for this area.
Volume 2 This zone extends in a radius of 60 cm and up to 3m of the ground from the outside of the bathtub or shower tray. One can install fixtures II class, protected against splashing water (IPX4). Discover our lights for this area.
Volume 3 This is the remaining area and are authorized fixtures class I (or higher), protected against vertically falling drops of water (IPX 1). Discover our lights for this area.

Each volume has a level of class protection against electric shock and a degree of protection (IP) that defines the water resistance level.

So we are 3 classes of protection:

  • Class I: the device has a functional insulation with earth terminal and equipotential bonding.
  • Class II: the device has reinforced insulation without metal parts. Catches Class II facilities have no ground pin.
  • Class III: the device operates at safety extra low voltage (SELV) of up to 50 volts.

As for the degree of protection (IP), it classifies the level of protection offered by a device for solids intrusions (first digit) and liquids (second digit).

Finally, security also requires proper maintenance of the lighting. Clean them regularly. When you change your light bulbs, turn off the electricity.

>> Read also: our advice  How to choose the lighting in my bathroom?