I witnessed an interesting debate this week within a small group of Franklin Electric’s Field Service Engineers. The topic was enclosure knockouts. Franklin Electric now offers some VFD accessories (reactors/filters) that are available in NEMA 4 enclosures that have no knockouts. That is, the conduit holes must be made by the installing contractor. Of course, a special hole saw or scoring tool is required to do this.
On one side of the table, the position was that the vast majority of water systems contractors don’t have these tools, and therefore we are not giving the customer what he wants. It’s up to us, the manufacturer, to supply enclosure knockouts across all water systems products.
However, on the other side of the table, a couple of others took the position that these products are going into higher end, sophisticated installations. As a result, many of these enclosures will be installed by the electrical contractor and this is their preferred method. They make conduit holes in enclosures as standard procedure and always have the tool kit to do it. This way, they can always cut only the exact hole sizes they need for the cable and Romex seals. And it leads to a better-sealed NEMA 4 installation since you don’t have to worry about water entry via the unused knockouts. Their position was that if a contractor is installing these enclosures, they simply need to invest in the right tool to do the job.
I was seeing both sides of the issue until I posed the question of, “So, how much is the tool and how long does it take?” The answer came back as, “Oh, probably less than $50 for a single and maybe $300 for an entire kit of several sizes; in terms of the actual process, just a few minutes”. For me at least, that settled it, although it probably didn’t settle it with the entire group. Once again, as a professional contractor, you need to have the right tools to do the job. It’s especially true if that tool is a minimal investment that can lead to a higher quality installation.