More brewing stand modifications

I wanted to give a little more detail on some mods I've made to the brewing stand. The first is a mod I made before I ever brewed on it the first time but haven't specifically mentioned. When I first built the rig I had hard piping everywhere, even connecting to the brewing vessel outlets. It became obvious right away that hard connections to the vessels required tolerances in pipe cutting and soldering that are very difficult to achieve in a garage without any special equipment. So shortly after assembling the completed plumbing system I cut out sections of the hard copper piping below each outlet valve and replaced them with high temp thermoplastic tubing. This reduces stresses on the pump heads and eliminates the need to have everything perfectly aligned when assembling the rig. The flex tubing below the hot liquor tank, mash tun, and kettle can be seen in the picture at the left.

The other modification is that I finally added switches for my pumps. Up to now I've been plugging each pump into an extension cord to turn it on and unplugging it to turn it off. Cumbersome at best, and confusing at worst when I'd get cords mixed up and plug or unplug the wrong one. So I bought a 2-switch switch box with switches, three cord grip connectors, and a cord. The cord grip connectors thread into the switch box and have a rubber grommet and compression nut that squeezes the grommet around the cord where it passes into the box. The switches are regular light switches and the faceplate of the box has actuators that flip the switch on the inside of the box when you operate the lever on the outside of the box. I bought all this stuff at Home Depot for around $25.

I cut the plug ends off the pump power cords, drilled holes in the plywood bottom shelf of the stand so I could run the cords beneath it inside the framing channel, mounted the switch box to one of the vertical pieces of framing channel, and wired everything up. Here are some details about the wiring. There are 3 wires in the pump cords; black (hot), white (neutral) and green (ground). The power cord I bought has the same three colored wires. The hot wires are connected to the switches so when the switch is open nothing in the pump is energized. If you wire the neutral wires to the switches they will function and everything will seem alright, but in this case the switches interrupt the circuit downstream of the pumps, so there is live voltage in the pumps even when the switches are in the off position. This isn't a particularly safe way to wire a circuit. All 3 white wires get connected together with a wire nut. All three green wires, plus a 4th which is connected directly to the switch box, get wire-nutted together as well. The 4th green wire ensures the switch box is grounded and is necessary for safety in case something shorts out. Also, since the box is screwed directly to the metal stand, the entire stand is now grounded. If you are wondering about a GFI, the outlets in my garage are GFI protected, so I didn't see the need to add a GFI to this circuit.

The switches work great and I'm looking forward to my next brew day and being able to start and stop pumps with the flip of a switch.