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#122600 - 12/04/05 07:27 PM "Other Codes"...Health Regs
Webmaster Offline


Registered: 10/07/00
Posts: 3142
Loc: NY, USA
Here is a picture of the inside of a walk-in cooler. Please note that the pipe is held away from the surface (with mineralacs).

USDA, and most Health Departments, require pipes to be supported in such a manner as to not interfere with cleaning. In practice, this means leaving a pretty good space between the structure and the pipe. You don't want to make a 'pocket' to trap crud.

Also in the pic, note that the alarm guys use set-screw type fittings. This is not an area that gets hosed down, so there probably is no requirement to use compression type fittings. Also, the alarm wires are arguably 'power limited' circuits, with less exacting requirements than power circuits.

- renosteinke

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#122601 - 12/05/05 12:30 AM Re: "Other Codes"...Health Regs
e57 Offline

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
The new RT fittings with the gaskets and seals are great for this application, along with a little bit of duct seal putty. You want to get rain in the light fixtures and switches? From the weather system that gets created inside the conduits that pass to the outside of this cooler, as the alarm guys might find out down the line. Sealing is required by 300.7(A)

I have seen light fixture jelly jars like that full from condensation. The colder it is inside, and the hotter is outside, add humitity, and you got a micro climate thunder storm.
Mark Heller
"Well - I oughta....." -Jackie Gleason

#122602 - 12/05/05 04:18 AM Re: "Other Codes"...Health Regs
PCBelarge Offline

Registered: 06/08/03
Posts: 657
Loc: Dobbs Ferry, NY, USA
That would be the reason that 300.7(A) is a requirement for this type of installation.
Pierre Belarge


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