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. | ||||
