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Sunlight exposure spec for outdoor elec enclosures

Sunlight exposure spec for outdoor elec enclosures

Sunlight exposure spec for outdoor elec enclosures

(OP)
Folks-
I'm looking for a spec that has to do with sunlight exposure on outdoor electronic equipment enclosures.

The spec, from BellCore or maybe ASHRAE, deals with the percentage of the normal solar load to apply to the outer surfaces for thermal analysis and design purposes.

I recall that the fractions were:

100% for surfaces normal to, and facing the sun e.g. "top" surfaces
50% for vertical surfaces normal to the "top" surfaces
0% for bottom surfaces (shaded)

Thanks in advance for your help on this.  I remembered what was most important but forgot where I got the information!

Tunalover

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