Bathroom zones

[Glennsparky]

I'm not long back into the industry as some time off due to ill health.
Just wondering if anyone has an up to date version of bathroom info attached.

 

[malcolmsanford]

Bathroom & Shower Room zones explained... Because of the increased risk of electric shock, a room containing a bath or shower is now considered a special location as outlined in the new 17th edition IEE Wiring Regulations. The new regulations pay special attention to the the zones in and around a bath or shower in the room. These areas can be briefly explained, as can their effect on the type of extractor fans which can be used.

Zone 0 § Zone 0 for a bathroom is the area inside the bath. § Zone 0 for a shower room is the area inside the shower basin. If there is no shower basin, zone 0 is 10cm high from the finished floor level and extends to 1.2m around the fixed shower head. § It is not practical to mount extractor fans in zone 0.

Zone 1 § 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. § Zone 1 for a shower room is 2.25m from the finished floor level or the height of the fixed shower head from the finished floor level if more than 2.25m, and the width of the shower basin. If the shower has no basin then zone 1 extends to 1.2m around the fixed shower head. § Zone 1 does not include zone 0. § The space under the bath tub or shower basin is considered to be zone 1. However, if the space under the bath or shower basin is only accessable with a tool, it is considered to be outside the zones. § Extractor fans installed within zone 1 must be at least IPX4. § Extractor fans installed within zone 1 must be fitted with 12v SELV motors with the SELV transformers and isolators fitted outside of zone 0, 1 & 2.

Zone 2 § Zone 2 for a bathroom is the same height as zone 1 (2.25m) extended to 0.6m around the bath. § Zone 2 for a shower room is the same height as zone 1 extended to 0.6m around the shower basin. If there is no shower basin zone 2 is replaced by zone 1 extended to 1.2m around the fixed shower head. § Extractor fans installed within zone 2 must be at least IPX4. § Extractor fans installed within zone 2 must be fitted with 12v SELV motors with the SELV transformers and isolators fitted outside of zone 0, 1 & 2. The extent of the zones in a bath or shower room can be limited by floors, ceilings and walls. For more detailed information see BS 7671 diagrams 701.1 & 701.2. Any electrical equipment installed on the surface of floors, ceilings and walls that limit a zone is subject to the requirements of that zone. RCDs are required for all circuits in locations that contain a bath or shower. The requirements for local supplementary bonding have been relaxed if certain conditions are met. Please note that this guide is only to be used as general reference. Please ensure that you are fully aware that any electrical and installation work must be carried out in accordance with IEE Wiring Regulations, The Building Regulations and any further compliancy that might be required. If in any doubt, consult professional help from a qualified individual or company.

 

[Glennsparky]

Cheers for quick reply Malcolm. My first post didn't quite go according to plan. Firstly, I'm trying to do it on my IPhone and havnt got the hang of it yet, secondly it sent before I read you need 6posts before you can attach an image. I was going to post the pocket guide 1 pic from the nice organisation. From memory you not allowed to mention them properly. It's the old 16th edition version & just wondered if there was a more recent version and if anyone had it

 

[IanHug]

Zone 0 § If there is no shower basin, zone 0 is 10cm high from the finished floor level and extends to 1.2m around the fixed shower head.

What zone would UFH in the shower area be?

 

[Glennsparky]

I have been asked to fit a bathroom heater in zone 2. There is a 17th edition consumer unit fitted and I was intending to take a radial circuit from it on a 16amp mcb to a switched fused spur outside the bathroom, as its easier than to spur from a socket off the ring main. The customer has no other means of heat in bathroom, ie radiator, so is asking me to provide suitable heater for environment aswell

 

[Deleted member 26818]

What zone would UFH in the shower area be?

It's outside the zones.

 

[IanHug]

It's outside the zones.

Thought it might be. How is that sensible with all the water above it being separated only by tiles & membrane?

 

[Glennsparky]

The switched fused spur is outside the zones but the heater will be fitted in zone 2

 

[Glennsparky]

He is thinking of a heated towel rail by the way with connections to spur outside the bathroom

 

[Deleted member 26818]

Thought it might be. How is that sensible with all the water above it being separated only by tiles & membrane?

It's still a circuit of the location, as such it will require 30mA RCD protection.

 

[Glennsparky]

It does have protection from 30mA R.C.D. as a 17th edition consumer unit is installed

 

[Guitarist]

If you have now returned "to the industry" I would recommend you getting yourself a copy of the 17th edition regs (1st amendment), otherwise you will struggle to comply with what is required.

 

[Deleted member 26818]

If you have now returned "to the industry" I would recommend you getting yourself a copy of the 17th edition regs (1st amendment), otherwise you will struggle to comply with what is required.

All you'll then struggle with, is understanding the bloody thing.

 

[Octopus]

And its notifiable!