Help an idiot wire some strips

kushedy

Well-Known Member







Looking for a little help as usual. Ok above is a Samsung F-Series strip build that I put together for vegging some plants. Now initially I wired it in series & it worked fine. I then realised I hadn’t checked the maximum number of these strips than can safely be wired in series.

Digi-Key support said 5is the max. I have 6 in series. Anyway, it got used for 5 weeks, always with someone in the house in case something did get wrong.

It’s now not in use for a while so I thought I better re-wire it. I have used solid core wire & wago’s to re-wire each strip in parallel.

I appreciate it looks messy but I have leant not to worry about tidying up too much at this point as I inevitably will always have to do some troubleshooting.

Anyway, I connected it up to the HLG-120H-C1050B I’ve been using it with in series. I switched on & all good initially. I plugged it into a watt meter & tested it again. When I turn the light down & up it visibly gets dimmer or brighter matching the direct of the potentiometer but the watt meter shows the max draw as around 48w. Max on this driver should be around 150w. That’s what I was actually getting when I tested it wired in series.

It certainly looks brighter than 48w. Anyway, I have a few of these wat meters on my cob builds so I have checked the wat meters & they all appear to be working correctly.

This was my first-time building using strips & parallel wiring so I’m guessing I have missed something very obvious but cannot work out what.

Does anyone have any ideas why I am getting these odd readings?
 
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diyled

Well-Known Member
If you run strips in parallel on that driver. Each strip would be getting 210ma ish which would explain the 48w;

A series circuit with 5 24v strips is fine, no need to go parallel.

e2a im sur them molex connectors are 300v. not 100v as digikey is suggesting.
 

shimbob

Well-Known Member
Put them back in series, you got some bad info from digikey.

The HLG-120H-C1050's voltage range is 74-148v. If those strips are LT-F562B then at 1.05A they will run at 22.9V. In series that's 6*22.9=137.4V, well within the range of the driver.

The driver is now in limp mode, not happy.
 

kushedy

Well-Known Member
Bastards! Not you guys, Digi-Key.


Ok just to clarify there are 6 strips on this & the way Digi-Key explained it is that each strip is manufactured in a way to only carry so much current in series & they were saying 5 strips is pushing it & beyond 5 strips the current level could fry the first strip in the series?


That’s all wrong?


Just covering backside before re-wiring again.
 

shimbob

Well-Known Member
They must have been looking at the specs of a different strip because the LT-F562B has a max rating of 1.8A.
 

kushedy

Well-Known Member
Excuse my terminology but Balls Balls Balls


I hate creating unnecessary work for myself.


Thanks for the help as always guys/girls. I’m off to re-wire again. Good thing I didn’t spend time making it look all nice & clean in parallel.
 
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