Didn't see this one coming!

[dynex22]

Today a combination city inspector hit me with this one. We have 3 -30 amp, 208 vac, 3-phase disconnects on a platform above a t-bar ceiling that runs 3 A/C units indoors.(units on platform). The disconnects are under a 2' X 4' skylight located on the roof approximately 3' below the roof. He wants proof that it's ok to have them their because of the possible heat generated. Commercial job So. Ca. Thanks!

 

[iwire]

Today a combination city inspector hit me with this one. We have 3 -30 amp, 208 vac, 3-phase disconnects on a platform above a t-bar ceiling that runs 3 A/C units indoors.(units on platform). The disconnects are under a 2' X 4' skylight located on the roof approximately 3' below the roof. He wants proof that it's ok to have them their because of the possible heat generated. Commercial job So. Ca. Thanks!

Did he cite a code section?

If not it sounds like you passed.

 

[stickboy1375]

The disconnects have to be located within sight and readily accessible from the AC equipment.

Im saying this in your favor of course.

 

[ptonsparky]

Draw me a picture.

 

[220/221]

He wants proof that it's ok to have them their because of the possible heat generated.

If your discos are generating heat, you have bigger issues.

 

[sd4524]

I bet its a lot more heat than a roof top disconnect

 

[kwired]

I am assuming he is concerned with ambient temperature that may be encountered.

Can you find an ambient temp rating for your disconnect? Bet all you find is allowable conductor rating of 75?C.

If this is what he is after did he even question whether or not your conductors were sized with consideration of ambient temperature?

 

[bob]

Today a combination city inspector hit me with this one. We have 3 -30 amp, 208 vac, 3-phase disconnects on a platform above a t-bar ceiling that runs 3 A/C units indoors.(units on platform). The disconnects are under a 2' X 4' skylight located on the roof approximately 3' below the roof. He wants proof that it's ok to have them their because of the possible heat generated. Commercial job So. Ca. Thanks!

Is he speaking of solar heat from the skylight? If so put a thermometer next to the dsconnect.