Home » Public Forums » GMCnet » Macerator Wiring (Is there a positive and negative wire?)
| Macerator Wiring [message #249582] |
Tue, 13 May 2014 07:43  |
mickey szilagyi
Messages: 273
Registered: January 2013
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Our black tank replacement is moving along nicely however yesterday we started on the macerator wiring and there is nothing in the instructions about which wire is the positive and negative. I recall reading about someone wanting to reverse the macerator motor by switching the wiring so I'm concerned, if that is possible, as we don't want ours to run backwards. We have a Jabsco 18590-2092 macerator pump with an orange and black wire. Seeing that there is no indication in the instructions as to which wire is positive or negative I'm assuming it doesn't matter and the macerator will run in the proper direction no matter which way we wire it but as I've been bit in the butt by some of my previous assumptions we'd appreciate if someone could confirm that it makes no difference which wire goes to the positive and negative feeds.
Thank you all as always,
Mickey
1977 Kingsley, 403, Lansing, MI
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| Re: Macerator Wiring [message #249583 is a reply to message #249582] |
Tue, 13 May 2014 07:54  |
Dennis S
Messages: 3046
Registered: November 2005
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mickey szilagyi wrote on Tue, 13 May 2014 07:43Our black tank replacement is moving along nicely however yesterday we started on the macerator wiring and there is nothing in the instructions about which wire is the positive and negative. I recall reading about someone wanting to reverse the macerator motor by switching the wiring so I'm concerned, if that is possible, as we don't want ours to run backwards. We have a Jabsco 18590-2092 macerator pump with an orange and black wire. Seeing that there is no indication in the instructions as to which wire is positive or negative I'm assuming it doesn't matter and the macerator will run in the proper direction no matter which way we wire it but as I've been bit in the butt by some of my previous assumptions we'd appreciate if someone could confirm that it makes no difference which wire goes to the positive and negative feeds.
Thank you all as always,
The black wire is the ground. Some run it to the frame -- others prefer to run the ground back to the power panel.
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Macerator Wiring [message #249595 is a reply to message #249582] |
Tue, 13 May 2014 10:26 |
mickey szilagyi
Messages: 273
Registered: January 2013
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Thanks Emery. That's kind of what got me thinking about this in the first place when we started the wiring, house wiring, so I wasn't sure which way to go with it. All set now, orange goes positive, black goes negative. We just need something in the black tank now to see how it works. I can hardly wait...
Mickey
1977 Kingsley, 403, Lansing, MI
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| Re: Macerator Wiring [message #249599 is a reply to message #249595] |
Tue, 13 May 2014 10:37 |
Dennis S
Messages: 3046
Registered: November 2005
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mickey szilagyi wrote on Tue, 13 May 2014 10:26Thanks Emery. That's kind of what got me thinking about this in the first place when we started the wiring, house wiring, so I wasn't sure which way to go with it. All set now, orange goes positive, black goes negative. We just need something in the black tank now to see how it works. I can hardly wait...
I suggest you test the macerator by putting fresh water in the black tank.
Just in case --
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Macerator Wiring [message #249601 is a reply to message #249592] |
Tue, 13 May 2014 10:44 |
Rob
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Registered: November 2013
Location: Victoria, BC
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Just to be nit-picky: in house wiring, green or bare is ground. White is neutral.
Some may view neutral as ground - but it's not!
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
On 2014-05-13, at 8:05 AM, Emery Stora wrote:
> Mickey
> The black is the ground. Most automotive applications use black for ground.
> Confusion often exists because in house wiring the white is ground and the black is hot.
>
> Emery Stora
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Rob -
Victoria, BC -
76 Royale - Rear Twins/Dry Bath
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| Re: Macerator Wiring [message #249605 is a reply to message #249599] |
Tue, 13 May 2014 11:09 |
mickey szilagyi
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Registered: January 2013
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Yes, that's what we plan to do. We put a new black tank on and we had to line up two of the three in-going pipes using a template. We then pushed the black tank up in place over those two pipes and couldn't actually see that they lined up and went together. We measured everything carefully and determined that everything "should" fit if the tank went all the way up against the bottom of the coach. It did so we are assuming the fit is good and leak proof. So, we'll test all the fittings by dumping water down the kitchen sink, bath sink/shower drains. We can see down the toilet and know that's a good fit. Once we find all is good we'll then try the macerator. Trial and error all the way...so far so good, some adjustments along the way but so far we haven't done anything really stupid that we couldn't fix without a major set back. And we got a lot of good information from a lot of you on this forum that helped out in prepping and doing this, good tips etc. It's all greatly appreciated.
Mickey
1977 Kingsley, 403, Lansing, MI
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| Re: [GMCnet] Macerator Wiring [message #249615 is a reply to message #249603] |
Tue, 13 May 2014 13:34 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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Do you want a real nit-pick? Canada is also 60 Cycle and part of the same grid as the US. One of the cross connects between the east and west US/Canada grid is located in Saskatchewan.
emerystora wrote on Tue, 13 May 2014 11:04Very true, Rob. But since it's an alternating current the polarity of the black and white keep switching back and forth 60 times per second (50 for where you are ). The white and the ground wire are connected together at the box in most house wiring.
I just didn't want to complicate the response.
But it's OK for you to be nit-picket as you are correct.
Emery Stora
> On May 13, 2014, at 9:44 AM, Rob wrote:
>
> Just to be nit-picky: in house wiring, green or bare is ground. White is neutral.
>
> Some may view neutral as ground - but it's not!
>
> Rob
> Victoria, BC
> 76 Royale - Rear Twins/Dry Bath
>
>> On 2014-05-13, at 8:05 AM, Emery Stora wrote:
>>
>> Mickey
>> The black is the ground. Most automotive applications use black for ground.
>> Confusion often exists because in house wiring the white is ground and the black is hot.
>>
>> Emery Stora
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Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Macerator Wiring [message #249631 is a reply to message #249582] |
Tue, 13 May 2014 17:49 |
kingd
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Ken B re Hz in Canada. I've heard that that high voltage
long distance transmission lines in Quebec are D.C.
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: [GMCnet] Macerator Wiring [message #249644 is a reply to message #249631] |
Tue, 13 May 2014 19:06 |
Rob
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Location: Victoria, BC
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I never would have ever thought that there would be a DC power transmission line, but:
https://en.wikipedia.org/wiki/Hydro-Qu%C3%A9bec%27s_electricity_transmission_system#High_voltage_direct_current_.28HVDC.29_450_kV
The things you learn on this list...
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
On 2014-05-13, at 3:49 PM, Dave King wrote:
> Ken B re Hz in Canada. I've heard that that high voltage
> long distance transmission lines in Quebec are D.C.
> --
> DAVE KING
> lurker, wannabe
> Toronto, Ontario, Canada
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Rob -
Victoria, BC -
76 Royale - Rear Twins/Dry Bath
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| Re: [GMCnet] Macerator Wiring [message #249648 is a reply to message #249644] |
Tue, 13 May 2014 19:39 |
GMC.LES
Messages: 505
Registered: April 2014
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Interesting how we learn about things in our own back yard from people thousands of miles away!
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On May 13, 2014, at 8:06 PM, Rob wrote:
I never would have ever thought that there would be a DC power transmission line, but:
https://en.wikipedia.org/wiki/Hydro-Qu%C3%A9bec%27s_electricity_transmission_system#High_voltage_direct_current_.28HVDC.29_450_kV
The things you learn on this list...
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
> On 2014-05-13, at 3:49 PM, Dave King wrote:
>
> Ken B re Hz in Canada. I've heard that that high voltage
> long distance transmission lines in Quebec are D.C.
> --
> DAVE KING
> lurker, wannabe
> Toronto, Ontario, Canada
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| Re: [GMCnet] Macerator Wiring [message #249837 is a reply to message #249648] |
Thu, 15 May 2014 22:59 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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I remember when AC power in most of Canada was 50hz instaed of 60 hz. The changeover to 60 was also a very interesting process. I was too young to remember all of the details but Canada was sold a bill of goods with the 50hz system.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Macerator Wiring [message #249841 is a reply to message #249631] |
Thu, 15 May 2014 23:41 |
Ken Burton
Messages: 10030
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Location: Hebron, Indiana
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kingd wrote on Tue, 13 May 2014 17:49Ken B re Hz in Canada. I've heard that that high voltage
long distance transmission lines in Quebec are D.C.
I believe there is one long distance DC feed down to New England. For some reason DC is suppose to have less loss than AC. Especially when running conductors close together, and under water or under ground. I have never investigated it enough to understand why.
Quebec was the first area to run UHV AC in the 735 to 765 kilovolt volt range. I believe all power terminated inside Quebec is AC and the only DC run is that one down to the US. I could be wrong on this.
Another place DC is used is when interconnecting grids. All connections between the Texas Grind, the Eastern Grid, and the Western Grid are DC.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Macerator Wiring [message #249851 is a reply to message #249841] |
Fri, 16 May 2014 10:50 |
Dave Mumert
Messages: 272
Registered: February 2004
Location: Olds, AB, Canada
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Here is a PDF that attempts to explain the advantages of DC transmission lines.
http://www.altalink.ca/files/pdf/WATL/facts-about-direct-current-transmission-lines.pdf
A couple of recent North-South transmission lines in Alberta were forced to go DC because of the reduced footprint. Farmers don't
like transmission towers in the fields and made a lot of noise about the disruption caused by a triple line of HVAC towers.
Dave Mumert
'76 Eleganza II
Alberta, CA
> -----Original Message-----
> Subject: Re: [GMCnet] Macerator Wiring
>
> kingd wrote on Tue, 13 May 2014 17:49
>> Ken B re Hz in Canada. I've heard that that high voltage long distance
>> transmission lines in Quebec are D.C.
>
>
> I believe there is one long distance DC feed down to New England. For some reason DC is suppose to have less loss than AC.
> Especially when running
> conductors close together, and under water or under ground. I have never investigated it enough to understand why.
>
> Quebec was the first area to run UHV AC in the 735 to 765 kilovolt volt range. I believe all power terminated inside Quebec is AC
and
> the only DC run is that one down to the US. I could be wrong on this.
>
> Another place DC is used is when interconnecting grids. All connections between the Texas Grind, the Eastern Grid, and the
Western
> Grid are DC.
> --
> Ken Burton - N9KB
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