Hi - I could use some help...
In a spray paint area (outside of a built-up booth, but still a mixing/touch-up area) I have a listed ep electric heater/blower (480/3/25A), about 2 feet below a ceiling of trusses and mesh/plaster and ~10 feet above the floor, but within 20 feet of spray zones (They want it treated as 1,1). The HVAC guy or users may want to aim the heater later. I would appreciate any experienced suggestions - I don't do this very often....
My plan - 501.4A2 > 501.11 - listed sealed clamp/gland/fitting up from ep disconnect box on heater, cable, listed sealed clamp/gland/fitting, rigid nipple through the mesh/plaster to unclassified area, unclasssified methods from there (exposed cable in in inaccessible area) to breaker outside of area.
Questions - Will the gland/fitting for the cable count as my 'seals' or do I have to also have poured seals between the cable and leaving the area (if there are no other joints) ? I will not have room to neatly provide for a poured seal fitting and enough cable for movement.
- Will the rigid passing through the mesh/plaster and firestopped be enough of a seal for a breech of the area?
Thanks - hoping for suggestions...
In a spray paint area (outside of a built-up booth, but still a mixing/touch-up area) I have a listed ep electric heater/blower (480/3/25A), about 2 feet below a ceiling of trusses and mesh/plaster and ~10 feet above the floor, but within 20 feet of spray zones (They want it treated as 1,1). The HVAC guy or users may want to aim the heater later. I would appreciate any experienced suggestions - I don't do this very often....
My plan - 501.4A2 > 501.11 - listed sealed clamp/gland/fitting up from ep disconnect box on heater, cable, listed sealed clamp/gland/fitting, rigid nipple through the mesh/plaster to unclassified area, unclasssified methods from there (exposed cable in in inaccessible area) to breaker outside of area.
Questions - Will the gland/fitting for the cable count as my 'seals' or do I have to also have poured seals between the cable and leaving the area (if there are no other joints) ? I will not have room to neatly provide for a poured seal fitting and enough cable for movement.
- Will the rigid passing through the mesh/plaster and firestopped be enough of a seal for a breech of the area?
Thanks - hoping for suggestions...