AMD 3 and "non-combustible" CUs...

[flameport]

Unanswered questions:
Was the front panel of the DB fitted or not? All the photos suggest it was not, including the aerial view of the DB and surrounding area after the fire.
If not, then how did this situation occur - the lack of the front cover would expose live parts and be totally unacceptable.

Was the cupboard filled with junk which then ignited as a result of the overheating? If it was just the metal DB in an empty cupboard, what else would have caused such a severe fire?

The lack of fire stop materials in the void above was noted in a report done in 2010 - did anyone actually read that or was it just done because someone said they needed it, then it was shoved in a file never to be seen again?

 

[stillp]

Given that we are all agreed that everything can be combustible, what about 422.4.2 "a luminaire shall be kept at an adequate distance from combustible materials"? Surely this means that luminaires shall be an adequate distance from ... everything.

 

[JohnD]

"non-combustible"

If not defined otherwise, the Clapham Omnibus applies.

 

[JohnW2]

Given that we are all agreed that everything can be combustible, what about 422.4.2 "a luminaire shall be kept at an adequate distance from combustible materials"? Surely this means that luminaires shall be an adequate distance from ... everything.

It does. Just as with "non-combustible", "combustible" is totally meaningless. They surely should use different words AND define what those words mean in terms of the required 'fire performance' of the materials/items?

I was recently reviewing some draft regulations which demanded "the absence of" certain chemical and microbiological contaminants. Similar problem - but at least I detected this at draft stage!

Kind Regards, John

 

[PBC_1966]

Red, yellow & blue?

How quaint.

But red, white & blue was rather patriotic!

 

[bernardgreen]

 

[EFLImpudence]

I told him not to park that near the luminaire.

 

[Jackrae]

Given that we are all agreed that everything can be combustible, what about 422.4.2 "a luminaire shall be kept at an adequate distance from combustible materials"? Surely this means that luminaires shall be an adequate distance from ... everything.

On the basis that the luminaire produces heat (little - some - lots depending on the device) then it is simple common sense that it should be "kept at an adequate distance from combustible materials" But interpretation of that statement to establish an adequate distance requires the application of some (or a lot) of common sense - something that overly prescriptive regulation tends to totally ignore.