May 16, 2010

Fun and Games -- electrical department

I am doing some wiring at the store and although the majority of it is new work, I am also having to clean up after someone else's idea of what can and cannot be done under NFPA 70 otherwise known as the NEC. Here are two examples in one photo:
wiring_01.jpg
Note the transition from the spiral flex tubing to the metal conduit. Note the bountiful use of electrical tape to secure the transition. Note the complete absence of any bushings or hardware to secure the transition. The problem here is that this is about a foot away from the back of our walk-in cooler and there is a big evaporator mounted on the ceiling. The black shape on the bottom left of the picture is the refrigeration line coming in from the compressor. Vibration from the motors will cause the metal to gradually erode the insulation leading to sparks, a fire or at minimum, a short circuit in a very uncomfortable place to reach. The other example is not as egregious -- it is the transition from the PVC conduit to the blue plastic flex pipe. Just stuffed in the end there with so secure fastening. With the plastic, you are not going to have the physical problems as with the last example but it still offends my sense of what is right. These are only two of the things that I will be correcting -- I am pushing to get the expansion done before I leave for the Blacksmithing conference but these items will be on my plate when I return... Posted by DaveH at May 16, 2010 5:48 PM
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