Component wiring polarity question

[JohnW2]

Any ideas on the cable config then?

Well, now that I have seen both imagines, it looks very probable that, as you suggested, the old L1 and L2 do, indeed, correspond to the new P(DC+) and P'(DC+'), respectively, but I'd be interested to hear other views.

Kind Regards, John

 

[FrodoOne]

The original device was, apparently, this - http://www.directindustry.com/prod/dem-spa/product-102829-1089101.html, which seems still to be available.
The new device concerned is, apparently, https://www.alliedelec.com/schaffne...MI4JnkmYuI2wIVF_5kCh0xfgBIEAAYAyAAEgKbxvD_BwE

 

[JohnW2]

The new device concerned is, apparently...

That link appears to be to a forum for discussion of car paintwork protection.

Kind Regards, John
Edit: typo corrected

 

[dagoof]

Thanks Frodo but after filling in details it says they have no distributors (for the old).

 

[ban-all-sheds]

car painwork

Is that a mobile S&M dungeon?

 

[securespark]

Both units have a pair in and a pair out.
Am I misunderstanding the problem?
P is phase in P' is phase out
N is neutral in N' is neutral out.

How were the wires attached to the original unit?

 

[JohnW2]

Both units have a pair in and a pair out. Am I misunderstanding the problem?

As I understand it, the OP's only concern was about 'which way around' the old L1 and L2 correspond to the new P(DC+) and P'(DC+') - but, as I've said, I think it is fairly clear that L1 corresponds to P(DC+).

... and, for what it's worth, I rather doubt it actually matters, anyway.

Kind Regards, John

 

[securespark]

I may be spectacularly short of brain this evening, but I don't follow.

Both units have 4 connections. Surely all you have to do is trace the wires connected to the old unit to find out where they go and then fit them to the corresponding terminals on the new unit.

 

[JohnW2]

Both units have 4 connections. Surely all you have to do is trace the wires connected to the old unit to find out where they go and then fit them to the corresponding terminals on the new unit.

... assuming, that is, that they have not already been disconnected from the old one.

However, whilst that approach would work for you an I, the OP might not have found it so easy to work out 'what was what' from the labelling and diagrams on the components.

Kind Regards, John

 

[securespark]

Sure. Which is why I am saying that, from the markings on the new device, (which is marked LINE and LOAD), we know which pair is which. All that needs to be done is to trace the wires in the equipment to find out which is LINE and which is LOAD, and attach them to the correct terminals.

 

[JohnW2]

Sure. Which is why I am saying that, from the markings on the new device, (which is marked LINE and LOAD), we know which pair is which. All that needs to be done is to trace the wires in the equipment to find out which is LINE and which is LOAD, and attach them to the correct terminals.

As I said, you and I would do that. The fact that the OP came here to ask suggests that such an approach was not so obvious to him (and maybe may not even be as easy to implement as one might hope - e.g. if the wires 'disappear through holes').

Kind Regards, John

 

[securespark]

Surely it can't be difficult to trace the incoming supply?
Either physically or with a multimeter?
And if it is, maybe you should give up and pay someone to do it for you!

 

[JohnW2]

Surely it can't be difficult to trace the incoming supply? Either physically or with a multimeter? And if it is, maybe you should give up and pay someone to do it for you!

Agreed - on all points.

Kind Regards, John

 

[John D v2.0]

Learning starts by asking questions! And hopefully doesn't precede an electric shock or large fire

 

[dagoof]

I do still have the original part and note of original wiring config - I did have a spark check it out, he's connected it but says he's by no means sure it's correct (yet to test it ).