Q & A of the Day - Does a shower room light fitting have to be special?

Question: Does a light fitting in a shower room have to be a vapour-proof fitting?

We are involved in managing disabled adaptations that are funded by Local Authority grants. To date we have always specified and had fitted vapour-proof light fittings, which the Local Authority has always paid for. We are now being told that they will not pay for these fittings. However, the electrical contractors are saying that if these fittings are not included, they will not issue the electrical certificate upon completion of their work. Can you confirm whether it is a requirement that vapour-proof light fittings be installed in a shower room?

Answer: Firstly, the term 'vapour-proof' is not a specified one. I am unsure of what you mean by 'vapour-proof'. If you are referring to the IP rating (moisture ingression rating) of the luminaire, then the IP rating must be adequate for the particular zone, see BS7671 Section 701. For example, Zone 2 would require at least an IPX4 rating. However, one aspect that is not specified is the use of an SELV luminaire directly above a shower. Although these can be fitted, they have a habit of the lamp exploding when sprayed with water. This is because the lamp face is exposed and hot. Many luminaire manufactures make specific products for this location that have an extra shield over the lamp. I would advise use of these directly above a shower.

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