Positive gnd Delco 10si

[Jamisonj1]

On pos gnd unit, where do spade #1 and 2 connect?

 

[560Dennis]

On mine , I did not use on 6 volt positve ground .

 

[Jim.ME]

On pos gnd unit, where do spade #1 and 2 connect?

I would expect the #1 spade would be the excitation terminal the same as on a negative ground 10SI and the #2 spade is the system voltage sensing terminal and they would wire the same as on a negative ground 10SI. Excitation from a switched terminal (with indicator light, diode, or resistor as required) and the sensing wire can go to the battery post on the alternator. The instructions for your positive ground alternator should tell for certain.

 

[used red MN]

Just to clarify a positive(+) ground alternator is uncommon and has to be intentionally sought out for purchase. Just want to make sure this is what you have because connecting an alternator to an incorrect polarity ruins the alternator or wiring or both. Just want that to be clear to save you any unexpected outcome. What tractor model and is it a 6 volt or 12 volt. Jim.ME has covered your connection questions as well as it can be with the information given.

 

[Jamisonj1]

I would expect the #1 spade would be the excitation terminal the same as on a negative ground 10SI and the #2 spade is the system voltage sensing terminal and they would wire the same as on a negative ground 10SI. Excitation from a switched terminal (with indicator light, diode, or resistor as required) and the sensing wire can go to the battery post on the alternator. The instructions for your positive ground alternator should tell for certain.

It seems that they use the same neg gnd regulator in these converted units , but the vr gnd no longer connects to case, but rather connects to the output (now neg). Thus the reason for my question.

Just to clarify a positive(+) ground alternator is uncommon and has to be intentionally sought out for purchase. Just want to make sure this is what you have because connecting an alternator to an incorrect polarity ruins the alternator or wiring or both. Just want that to be clear to save you any unexpected outcome. What tractor model and is it a 6 volt or 12 volt. Jim.ME has covered your connection questions as well as it can be with the information given.

Sounds like you are not familiar with the VR, as if you look at the circuit, there is noway that those connections can function with the vr terminal that is normally tied to case gnd is now tied to neg output of alternator. I wanted someone who has installed one that could do better than expect or guess or even better post installation instruction sheet.

 

[used red MN]

It seems that they use the same neg gnd regulator in these converted units , but the vr gnd no longer connects to case, but rather connects to the output (now neg). Thus the reason for my question.

Sounds like you are not familiar with the VR, as if you look at the circuit, there is noway that those connections can function with the vr terminal that is normally tied to case gnd is now tied to neg output of alternator. I wanted someone who has installed one that could do better than expect or guess or even better post installation instruction sheet.

Awesome, to know that you are “in the know” and have an understanding of what you have going on. It would have been nice if you had divulged the details about the polarity of the regulator mounting lugs in your opening post. I understand what you are saying after that clarification. In the linked regulator in your alternator does the metal conductor around the mount hole marked D+ now see a negative polarity? Delco 10si example regulator
It almost seems as it does. I don’t know, either the exciter circuit would need to come from a something that connects it to the Chassis positive polarity. Or the regulator has had changes to its circuitry to connect in the normal fashion as Jim suggested. Seems like this would be information that would need to be supplied by the vendor/manufacture.

 

[Jim.ME]

It seems that they use the same neg gnd regulator in these converted units , but the vr gnd no longer connects to case, but rather connects to the output (now neg). Thus the reason for my question.

Sounds like you are not familiar with the VR, as if you look at the circuit, there is noway that those connections can function with the vr terminal that is normally tied to case gnd is now tied to neg output of alternator. I wanted someone who has installed one that could do better than expect or guess or even better post installation instruction sheet.

You haven't told who the supplier is or anything beyond saying it is a Delco 10SI positive ground. I would guess it may be a Delco Remy 10SI style, but I doubt it is a Delco Remy built alternator, so anything you get is in reality a guess until the alternator is completely identified. I suggest you contact the supplier of the alternator and ask them your question, as you don't want expect or guess. You should also ask them for the instruction sheet for the alternator they built.

Unless it was built as a one-wire, which you asking what goes on the #1 and #2 spade terminals pretty much rules that out, the #1 terminal is excitation, and the # 2 terminal is system voltage sensing on the negative ground regulators, which you say is the regulator in that alternator. Good luck.

 

[wore out]

Jamison, you are correct, the others are a bit confused. Fellow Board member JMOR and I had already been discussing this off-line before your question came up. A (-) ground regulator is indeed used on some of the (+) ground conversations with some clever rewiring. I am not at my 'puter and can't access the exact details right now, though.

I'm pretty sure I remember the fine details but am not going to post from memory when there is a chance of smoke leaking out of the project alternator!

Perhaps Jesse will come along and add the details, or I will when I get back.

In the meantime, DO NOT connect "excite" or "Voltage feedback to the #1 or #2 terminals!

 

[wore out]

Awesome, to know that you are “in the know” and have an understanding of what you have going on. It would have been nice if you had divulged the details about the polarity of the regulator mounting lugs in your opening post. I understand what you are saying after that clarification. In the linked regulator in your alternator does the metal conductor around the mount hole marked D+ now see a negative polarity? Delco 10si example regulator
It almost seems as it does. I don’t know, either the exciter circuit would need to come from a something that connects it to the Chassis positive polarity. Or the regulator has had changes to its circuitry to connect in the normal fashion as Jim suggested. Seems like this would be information that would need to be supplied by the vendor/manufacture.

It is interesting that the polarity of the power fed to the brushes doesn't change when measured between the brushes, but flips with respect to the "case" of the alternator.

 

[Jamisonj1]

Awesome, to know that you are “in the know” and have an understanding of what you have going on. It would have been nice if you had divulged the details about the polarity of the regulator mounting lugs in your opening post. I understand what you are saying after that clarification. In the linked regulator in your alternator does the metal conductor around the mount hole marked D+ now see a negative polarity? Delco 10si example regulator
It almost seems as it does. I don’t know, either the exciter circuit would need to come from a something that connects it to the Chassis positive polarity. Or the regulator has had changes to its circuitry to connect in the normal fashion as Jim suggested. Seems like this would be information that would need to be supplied by the vendor/manufacture.

“Does the D+ show a neg polarity?” Measured relative to what?

 

[Jamisonj1]

Yes, it would really be nice if people could only answer the question being asked rather than guessing or asking questions that reveal that they do not know

 

[used red MN]

“Does the D+ show a neg polarity?” Measured relative to what?

Relative to the battery.

 

[used red MN]

Yes, it would really be nice if people could only answer the question being asked rather than guessing or asking questions that reveal that they do not know

To the best of my knowledge the forums on YT are “discussion forums” The majority of the topics addressed here are presented in a question format. Members reply and discussion is made and often the solution is reached by those who offered discussion. I suppose you could start a forum called Jamison’s Question and Answer Forum, then you could have your posting rules say “Only direct and correct answers will be allowed as replies”. I am not sure who your moderator will be. I suppose it could only be one person.

 

[caterpillar guy]

Not trying to criticize but we see all thew time where questions are asked with little information or even no pictures and then they get in a huff because the answer was not as they expected or very vague. Well the more information the better the answer. Like asking if a 5 bolt wheel will fit on such and such vehicle well maybe and maybe not. Not trying to be a smarty pants just the way it is. There is a lot of very capable people here just need the necessary information to give a good answer . As for the positive grnd thing why not just switch it to neg grnd and have it like the rest of the world instead of like an orphan?

 

[used red MN]

As for the positive grnd thing why not just switch it to neg grnd and have it like the rest of the world instead of like an orphan?

Changing the machines polarity does have its added complexities in some case. A fuel gauge for instance is one of these items. No personal experience but I could see where it is a good possibility that it would not respond well to a polarity switch. Oops, maybe I should not have added this since it is not a direct answer to the OP.

 

[Jamisonj1]

OK, sorry if I hurt anyone’s feelings, but all I wanted was a “been there done that” guy. Thanks to all for your mental exercises. From searching YT archives, it looks like I need to find Welding man. 560Dennis perhaps covered it for some case, but, I don’t think it covers the case where the standard factory VR is used in the positive gnd conversion kits , where it seems that as a minimum #2 has to be connected somewhere. Yes , like other ‘worlds best guessers’, I could guess that place to be battery + /alt case, but I would rather find hard facts. Thanks again and good day.

 

[Jim Becker]

Okay, here is a precise answer to your original question. Both spade #1 and 2 connect on the side of the alternator.

 

[JMOR]

Okay, here is a precise answer to your original question. Both spade #1 and 2 connect on the side of the alternator.

"on the side of the alternator." Meaning to the case? Have you done this conversion? And, pardon the questions, but it sure seems like without #1 being switched, that there would be a 24-7 field current drain? Thank you. I know I'm late to the party & apologize for breaking in , so to speak, but I have been curious about this conversion for sometime.

 

[Jim Becker]

"on the side of the alternator." Meaning to the case? Have you done this conversion? Thank you.

No, I meant each wire plugs onto a spade connector. The spade connectors are on the side of the alternator. I need to start using smilie faces.

The only alternator conversion I've done is to remove an externally regulated alternator and replace it with a 6-volt generator.

 

[JMOR]

No, I meant each wire plugs onto a spade connector. The spade connectors are on the side of the alternator. I need to start using smilie faces.

The only alternator conversion I've done is to remove an externally regulated alternator and replace it with a 6-volt generator.

ok