For such a small paragraph in BS5266, I fend many questions with respect to when you must provide emergency lighting and when it should be supported with emergency lighting calculations. I assume I am not alone in this, so I thought I would share my interpretation of the requirements. I could not find any information on when you would consider a multi-closet facility to have borrowed light, the assumption at the end is unfounded and my interpretation only. Comments appreciated. [post comment] The original intend of this post was to find if this table helped simplify the process of determining the requirements for emergency lighting in bathrooms etc. The intent was not to discuss the design process, nor the question of what borrowed light is, or any other standard. Unfortunately, I am unable to delete the topic or close it. Applicable for: Toilets Bathroom Showers Changing Rooms Use of Space Provision of Borrowed Light Area of Space Emergency Lighting Required Calculation Required For Use by Disabled Persons All 8m2 or less YES NO For Use by Disabled Persons All Above 8m2 YES YES Single Closet Facilities With Borrowed Light 8m2 or less NO - Single Closet Facilities Without Borrowed Light 8m2 or less NO - Single Closet Facilities With Borrowed Light Above 8m2 YES YES Single Closet Facilities Without Borrowed Light Above 8m2 YES YES Multiple Closet Facilities With Borrowed Light 8m2 or less NO Multiple Closet Facilities Without Borrowed Light 8m2 or less YES NO Multiple Closet Facilities With Borrowed Light Above 8m2 YES YES Multiple Closet Facilities Without Borrowed Light Above 8m2 YES YES Hotel Bathroom/Ensuits With Borrowed Light 8m2 or less NO - Hotel Bathroom/Ensuits Without Borrowed Light 8m2 or less NO - Hotel Bathroom/Ensuits With Borrowed Light Above 8m2 YES YES Hotel Bathroom/Ensuits Without Borrowed Light Above 8m2 YES YES Note: closet, wall and doors must allow borrowed light. Using standard partition sizes and typical minimum ceiling height this would include 300mm above, and 100mm below. Where closet cannot be provided with borrowed light then emergency lighting per closet should be provided.

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5.2.8.5 Toilet facilities and changing rooms

For such a small paragraph in BS5266, I fend many questions with respect to when you must provide emergency lighting and when it should be supported with emergency lighting calculations.

I assume I am not alone in this, so I thought I would share my interpretation of the requirements. I could not find any information on when you would consider a multi-closet facility to have borrowed light, the assumption at the end is unfounded and my interpretation only. Comments appreciated.

[post comment] The original intend of this post was to find if this table helped simplify the process of determining the requirements for emergency lighting in bathrooms etc. The intent was not to discuss the design process, nor the question of what borrowed light is, or any other standard.

Unfortunately, I am unable to delete the topic or close it.

Applicable for:
Toilets
Bathroom
Showers
Changing Rooms

Use of Space	Provision of Borrowed Light	Area of Space	Emergency Lighting Required	Calculation Required
For Use by Disabled Persons	All	8m2 or less	YES	NO
For Use by Disabled Persons	All	Above 8m2	YES	YES
Single Closet Facilities	With Borrowed Light	8m2 or less	NO	-
Single Closet Facilities	Without Borrowed Light	8m2 or less	NO	-
Single Closet Facilities	With Borrowed Light	Above 8m2	YES	YES
Single Closet Facilities	Without Borrowed Light	Above 8m2	YES	YES
Multiple Closet Facilities	With Borrowed Light	8m2 or less	NO
Multiple Closet Facilities	Without Borrowed Light	8m2 or less	YES	NO
Multiple Closet Facilities	With Borrowed Light	Above 8m2	YES	YES
Multiple Closet Facilities	Without Borrowed Light	Above 8m2	YES	YES
Hotel Bathroom/Ensuits	With Borrowed Light	8m2 or less	NO	-
Hotel Bathroom/Ensuits	Without Borrowed Light	8m2 or less	NO	-
Hotel Bathroom/Ensuits	With Borrowed Light	Above 8m2	YES	YES
Hotel Bathroom/Ensuits	Without Borrowed Light	Above 8m2	YES	YES

Note: closet, wall and doors must allow borrowed light. Using standard partition sizes and typical minimum ceiling height this would include 300mm above, and 100mm below. Where closet cannot be provided with borrowed light then emergency lighting per closet should be provided.

0 ebee over 3 years ago

It can work the other way too. A good few years back I noticed that a couple of wholesalers, when supplying pull switches for lighting. I bought them by the box for best prices. I usually stocked 2 way pulls because they could also be used for one way. Not much price difference so not worth the bother. Anyway, I did notcice if I actually asked for one way I ended up with 2 way at the one way price. So I ordered boxes of 1 way, small saving, always received two way. Over the years I saved quite a bit. Always save a shilling if you can, that`s me.

PS I did notice some years back that if you ordered an immersion heater from an Electrical Wholesaler you got an immersion heater with stat already fitted. If you ordered from a Plumbing Wholesaler the stat was not included. Same price though!. If you ordered from a Electrical Wholesaler who had obtained them from a Plumbing Wholesaler then they would give you the stat separately free of charge.
Why would anyone want a heater but not a stat? not unheard of but quite rare?
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0 AJJewsbury over 3 years ago

Why would anyone want a heater but not a stat?
I suppose if you're replacing an existing one, you could pinch the 'stat from the old one (likewise the flex). I suspect there are more replacements than new installs these days.
- Andy.
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0 Zoomup over 3 years ago

AJJewsbury:

Why would anyone want a heater but not a stat?
I suppose if you're replacing an existing one, you could pinch the 'stat from the old one (likewise the flex). I suspect there are more replacements than new installs these days.
- Andy.
That could be done, but I never do, and I change many immersion heaters every year. It is not worth the trouble if the customer says that the new immersion heater is faulty because the stat fails in some way or another.

Z.
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0 Sparkingchip over 3 years ago

I think I deserve a badge for trying to stay on something like the subject.
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0 ebee over 3 years ago

?
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5.2.8.5 Toilet facilities and changing rooms

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