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Old 11-29-2010, 06:32 PM   #1
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Default 3-pin connectors, NEMA/UL rated? brewery safe?

Moving on from 2 wire solonid valves to 3 wire motorized ball valves. All of the connectors and wiring needs to be re-done. We're wondering if their is a NEMA or UL rated 3-pin connector thats safe for being near water/beer/high temps.

We were looking on McMaster but most solutions are around $30+ for each connector... and at over 40 connectors needed, not practical. Brewers Hardware is using an M8 connector but these seem difficult to find and the rating of the connectors is unknown to us.

We also tried using Fiberglass braiding to protect the wires as it was the only inexpensive heat shielding option we could find. This turned out to be a poor product that resembled fiberglass mat with fibers shedding everywhere instead of the expected tightly woven nylon type strands.

So if anyone knows of or has a suggestion for a 3 pin connector, wire, or conduit thats heat resistant or brewing safe please let us know

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Old 11-29-2010, 09:45 PM   #2
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This is what I plan for my solenoid valves:





They are available pretty cheaply from:http://www.oscsys.com/Connectors/

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Old 11-29-2010, 11:22 PM   #3
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Any idea what size those connectors are? Are they xlr connectors or smaller?

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Old 11-30-2010, 02:20 AM   #4
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I don't know the ratings on those, but most XLR connectors are 6A @125.

Insulation:
http://cableorganizer.com/fiberglass/

I think you're SOL for high-temp+waterproof plugs that are cheap. Maybe something automotive?
http://cgi.ebay.com/ebaymotors/9004-...Q5fAccessories

B

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Old 11-30-2010, 11:43 AM   #5
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I believe they are 5 amps and they are smaller than XLR Connectors.

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Old 12-01-2010, 08:31 PM   #6
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Sweet. Those look like a steal compared to others I have seen. Going to be placing an order for ball valves from them anyway so that makes the order easy.

Anyone have a recommendation for a heat resistant wire, conduit, or other general wire protection? Right now we are using 2" magnets with 2" split rings to hang bundles of wires away from the hot brew rig. We have already melted the insulation off of 3-4 wires who were suspended over the corners of the brew system and in the jet stream of heat. Also, spilled some hot wort on a bundle of wires, not to fun to clean up. Electronics + hot liquids dont play nice together.

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Old 12-03-2010, 04:39 AM   #7
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just spend the cash and the time to put everything in conduit. Keep the tubes away from the hot parts of the brew system and you'll be farther ahead.

If you want to mess around with 105*C cable, and fiberglass insulation, go for it. Or you could just build the conduit and not have to worry about it.

JMO,
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Old 12-03-2010, 02:27 PM   #8
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Quote:
Originally Posted by bad coffee View Post
just spend the cash and the time to put everything in conduit. Keep the tubes away from the hot parts of the brew system and you'll be farther ahead.

If you want to mess around with 105*C cable, and fiberglass insulation, go for it. Or you could just build the conduit and not have to worry about it.

JMO,
B
So what conduit would you recommend? Its 400-600F near the burners at times.


Sawdustguy - I see they have male cable plugs and female panel plugs... but no female cable plugs so I cant do a cable-cable connection to disconnect the valve if needed for cleaning. Trying to unthread a valve with a wire attached seems like a bad idea. Any ideas?
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Old 12-03-2010, 06:08 PM   #9
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Quote:
Originally Posted by blackheart View Post
So what conduit would you recommend? Its 400-600F near the burners at times.


Sawdustguy - I see they have male cable plugs and female panel plugs... but no female cable plugs so I cant do a cable-cable connection to disconnect the valve if needed for cleaning. Trying to unthread a valve with a wire attached seems like a bad idea. Any ideas?
The way I see it after an exhaustive search you have two options:

1. Splice in a longer cable to your valves so you do not need to have a go between cable and can remove your valves.

2. Go to a XLR type connector
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Old 12-03-2010, 08:02 PM   #10
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I think I found one on E-Bay.... It looks like its the male in line cable connector for the same MIC connectors.....
http://cgi.ebay.com/3x-3-Pin-Male-Mi...#ht_2640wt_952

I did some connector research today. Found out these MIC connectors were a 2+ multi pin design used mainly in older CB radio mic's hence why they are so cheap now and why their is mainly just the two types of connectors, and not all 4 possible combinations.

Now for the daunting task of ordering, counting, wiring, soldering, crimping, testing around 40 + connectors with 3x pins each.....


Still looking for suggestions for wire or conduit if anyone has them!

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