cadpoint
Senior Member
- Location
- Durham, NC
This week, I'll be installing service to large motors through thermal insulated panels of large HVAC equipment. My holes will be made on roof of housing and drop down to motor in flex. These are just the Supply and Return motors in struture and all cool or heat coils are down line at point of use.
Frankly, I?m a little put out that the manufacture didn?t imply how to enter with electric service or even maintain the negative pressure of the space. Maybe I should review their literture again. (damn selective reading):smile:
Am I just making to much of it ?
Another air handler on site , in use (existing), has a PVC/ Armor popping right in the side of a unprotected hole, on the side of thermal panel, gezz. I think I can do better than that. Yes, I did put my hand on the flex and could feel the draw of air!
A plastic gourmet, flex, and duct seal would be better than what I saw.
The space in only electrical and HVAC equipment only and no chemicals!
Any suggestions, or what your local AHJ might like to be used ?
Yes I've read up at manufactures site, I frankly can't find much code wise
other than using flex due to isolation , or reading in Class ( ) locations.
manufacture states 440, which via 440 opens up 422, 424, 430. : ).
Am I really mixing Building codes into the NEC to use Class ( ) locations,
to obtain a sealant, what is an approved sealant ? Is fire paste dual rated ? 501.15(F)(3). Silicon is always available or is it ? !
Am I going to have to talk to the low voltage guy and see what they use, the manufacture covers his penetrations, "Grommet"...
Frankly, I?m a little put out that the manufacture didn?t imply how to enter with electric service or even maintain the negative pressure of the space. Maybe I should review their literture again. (damn selective reading):smile:
Am I just making to much of it ?
Another air handler on site , in use (existing), has a PVC/ Armor popping right in the side of a unprotected hole, on the side of thermal panel, gezz. I think I can do better than that. Yes, I did put my hand on the flex and could feel the draw of air!
A plastic gourmet, flex, and duct seal would be better than what I saw.
The space in only electrical and HVAC equipment only and no chemicals!
Any suggestions, or what your local AHJ might like to be used ?
Yes I've read up at manufactures site, I frankly can't find much code wise
other than using flex due to isolation , or reading in Class ( ) locations.
manufacture states 440, which via 440 opens up 422, 424, 430. : ).
Am I really mixing Building codes into the NEC to use Class ( ) locations,
to obtain a sealant, what is an approved sealant ? Is fire paste dual rated ? 501.15(F)(3). Silicon is always available or is it ? !
Am I going to have to talk to the low voltage guy and see what they use, the manufacture covers his penetrations, "Grommet"...
