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scottstribling · 11-27-2012, 10:15 PM

Have read all the forums and found a few that were adaptable (maybe/not). Here is what I have:

Source Main Panel:
30a, 240v, GFCI feeding a 10/3 + ground wire to a 30a, 240v Pass&Seymour locking outlet.

Control Box Components:
Buzzer, 120/240, FLBuz
Switch, 3 position, 2 NO, SW3 (Power to HLT and BK elements, 4500W, 240v) never on together
Power Light Indicator for HLT and BK elements, IND-1
PID, SYL2352
40A SSR
2 30A, 250V, DPDT, 120V Coil Contactor (HLT and BK)
Power Button (Push Button Illuminated) for Pump, SW11
Timer, ASL-51
Reset Button, Push Button Momentary, SW7

2 Female Pass&Seymour plugs for each element (30A, 240V, 3 Wire)
2 Female 120V plugs for Chugger Pump, 1.4A
1 RTD Sensor

All Buttons, switches, PID, Timer and SSR are from Auber.

Appreciate any help. Hope this is detailed enough.

**jeffmeh** · 11-27-2012, 11:18 PM

First question: How do you plan to derive power for the 120V pumps, given that you only have 10/2 (+ground?) coming from the breaker box?

scottstribling · 11-27-2012, 11:32 PM

From what I have seen on previous schematics, the primary power coming in is split between 2 bus bars. I would assume that each bus bar would then be 120v each (BUS 1, 120V) (BUS 2, 120V). Should be 3 BUS bars, B1 120V, B2 120V, B3 Ground. Connect the Hot leg from 120V outlet to B1 and ground to B3.

**jeffmeh** · 11-28-2012, 12:50 AM

I am not an electrician, but I believe that to do this safely you really need a dedicated neutral that is separate from ground. What you are suggesting will give you 120V power, but you are using your ground as the neutral. This is not recommended, and I would think that it would trip your GFCI breaker.

There are plenty of folks on here who understand this stuff better than I, but I did get the safety warning correct. Can you run 10/3 + ground? The other option is to run 120V from a separate 120V circuit to the panel.

**BadNewsBrewery** · 11-28-2012, 01:32 AM

Using a single conductor to act as both a neutral for deriving 120v and as a ground for secret is a bad plan and should not be done.

scottstribling · 11-28-2012, 01:52 AM

Ill end up pulling 10/3......thanks. Ill edit my source in equipment list.

**BadNewsBrewery** · 11-28-2012, 08:46 AM

Looking at your list a bit more - you have a PID power button - why? Is there ever a time where you're going to want to have the panel on but the PID off? Also, you don't have an SSR, contactors, or fuses listed, all of which are a good idea.

scottstribling · 11-28-2012, 09:53 AM

True on the PID power button. I have a 40a SSR listed next to the PID. I also have a heat sink for it. What are the contactors used for?

scottstribling · 11-28-2012, 09:59 AM

Too early..meant power button for PID to be alarm button on , off. Changed power button to alarm. Moved SSR to line item.

**BadNewsBrewery** · 11-28-2012, 10:55 AM

The contactor - either read up on it from Kal (www.theelectricbrewery.com) or we went over it pretty well here: http://www.homebrewtalk.com/f170/control-panel-wiring-help-369945/