Workplane

Wiring Regulations - BS 7671 - IET Electrical

IET Wiring Regulations index - The IET

Off topic?

May the Bird of Paradise Fly Up Your Nose!

You mean workplace?

http://smallbusiness.chron.com/osha-lighting-standards-2641.html

http://webstore.ansi.org/workplace-lighting/

http://www.dial.de/DIAL/en/dialux/tutorials/dialux-evo/6-dialux-evo-arranging-lights.html

http://www.eclipselightinginc.com/pages/technical/lamp-type-lumens-output-guide.php

Since all you need is a height, take a look at where the work will be performed, relative to the floor. The height of the light fixture minus the work plane height is just the distance from the light fixture to where it will be needed.

If you are working (sitting) on the floor, the work plane height is zero.

The position of the working plane will be determined from the floor cavity index, for which you will need to determine its effective reflectance and from that calculate the utilisation factor (which is a term within your equation)

Basically, you'll need the UF from tables (or first principles) for a particular luminaire and particular geometry.

Press F1 and look into the help file.

Usually if it is a good software there should be some additional information.

If the software is made for engineers that know the code it might not have to mention it.

Is there even a code for this?

My best guess is: ceiling height minus workbench height is work plane height unless there is input for ceiling height then the work plane height is workbench height.

The National Electrical Code has a breakdown of all the different needs for lighting.

Check the 2014 edition of the NEC.

If you mean in India, try this....National Lighting Code.....

http://www.bis.org.in/other/NLC_Synopsis.pdf

My ancient IES Code just lists desk, bench, floor...

BS EN 12464-1:2011

Light and lighting. Lighting of work places. Indoor work places

...another part covers outdoor...

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