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Old 01-03-2012, 05:04 AM   #1
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Default Wiring for 120v system

I've been using a Counter Top Brutus (a la jkarp) for brewing over the last couple of years with GREAT success. I'm now prepared to move my brewing into a dedicated space, so I wanted to do it up a little "fancier" than the standard outlets and light switches I've been using.

I've consulted many of the diagrams provided by P-J (and spoken with P-J himself [Thanks, P-J!]) and I've come up with a wiring plan. I think I've got it all sorted, but I'd like a few more experienced eyes to look things over for me. All switches are from Auber with the exception of the main power key lock.

One thing I'm not real clear on is the element indicator light. I don't really want to put in a 22mm indicator (from automationdirect.com), but I haven't found a good replacement as of yet. (I know it's redundant, but I've burnt elements in the past and I want to know for sure when the element has power.)

At this time I don't have any plans on upgrading to a larger system, but I am planning the wiring and some of the more expensive components for that possibility. I already own the PID and the SSR.

I appreciate it a great deal.

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Old 01-03-2012, 11:54 AM   #2
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I'm planning a similar 120v system, and your diagram looks pretty much the same as what I was going to do. One thing I notice (after I re-read your post and realized you meant to oversize things) was you have a 1A fuse on the PID power line where I'm planning on a 0.25A fuse for that spot. I don't have the timer or alarm, though; I'm putting the PID, a power indicator lamp, and a 120v fan on that line. Max draw on those three things together is something like 0.18A.

I also have a plain 30A toggle switch instead of the contactor. You can't upgrade much on the 120V contactor you have in there, so you may want to pay for the bigger (240V) contactor or go with the cheaper toggle switch.

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Old 01-03-2012, 03:37 PM   #3
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Search amazon for 120 volt led indicator lights. Less than $3. They are small and don't use hardly any power.

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Old 01-03-2012, 04:10 PM   #4
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Search amazon for 120 volt led indicator lights. Less than $3. They are small and don't use hardly any power.
or you can get them from radio shack.
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Old 01-03-2012, 06:09 PM   #5
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I'm planning a similar 120v system, and your diagram looks pretty much the same as what I was going to do. One thing I notice (after I re-read your post and realized you meant to oversize things) was you have a 1A fuse on the PID power line where I'm planning on a 0.25A fuse for that spot. I don't have the timer or alarm, though; I'm putting the PID, a power indicator lamp, and a 120v fan on that line. Max draw on those three things together is something like 0.18A.

I also have a plain 30A toggle switch instead of the contactor. You can't upgrade much on the 120V contactor you have in there, so you may want to pay for the bigger (240V) contactor or go with the cheaper toggle switch.
The voltage of the coil on the contactor does not need to be any greater than 120v. It's isolated from the load current; it's only activating the magnet that closes the contacts. My home central air conditioning unit has a 24v coil contactor that switches a lot more current than 24v.

That's my understanding, but I'm not an electrician by any means.

I don't want to switch to a simple toggle. I like the redundancy built into the illuminated switches and the element indicator. I also like the look, which is of value to me.

I'll re-examine the fuse size. I hadn't really given that much thought as I simply copied that fuse value from another build.

Thanks for taking a look. I appreciate the input.
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Old 01-03-2012, 06:15 PM   #6
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Search amazon for 120 volt led indicator lights. Less than $3. They are small and don't use hardly any power.
Thanks. I don't know why I never think of Amazon for stuff like this. They have everything...

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or you can get them from radio shack.
Thanks. I never think of them anymore since they're basically a cell phone store here. I'll give them a look next time at the dreaded mall.
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Old 01-03-2012, 08:11 PM   #7
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Thanks. I don't know why I never think of Amazon for stuff like this. They have everything...



Thanks. I never think of them anymore since they're basically a cell phone store here. I'll give them a look next time at the dreaded mall.
I've used these:
120-Volt Neon Green Lamp (2-Pack) - RadioShack.com

and these:
120-Volt Neon Red Jumbo Lamp Assembly - RadioShack.com

Both work great on 120V...the red ones are a nice size with the 22mm switches we all love, I think:


(Red lights are in between the green and red pushbuttons on the right).
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Old 01-03-2012, 08:44 PM   #8
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I've used these:
120-Volt Neon Green Lamp (2-Pack) - RadioShack.com

and these:
120-Volt Neon Red Jumbo Lamp Assembly - RadioShack.com

Both work great on 120V...the red ones are a nice size with the 22mm switches we all love, I think:


(Red lights are in between the green and red pushbuttons on the right).
Nice panel!

I just saw those in my cursory search of the site. I'm a bit concerned about the negative reviews on all of the lights at the Shack. It's a very limited number of reviews, though. Probably inexpensive enough to at least give them a try.
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Old 01-03-2012, 08:51 PM   #9
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Hrm, odd. Who writes reviews for lights? . I honestly never looked. I can say that both the green and red ones I linked to were plenty bright. I mean, they aren't flashlights, but it was very clear they were on, more than bright enough for me.

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Old 01-03-2012, 09:30 PM   #10
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Another crappy cell pic, if that helps:

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