Recent content by Roswell Bob

Ok, Thank, I let him know.

My son just picked up a wrecked Prius Hybrid. He said it is totaled. Are the battery packs worth anything?

https://www.digikey.com/en/products/detail/te-connectivity-aerospace-defense-and-marine/5-1618388-8/2362831 The contactor runs directly off of 48v pack. Max voltage is about 54v. Spec says 60v is max input. I noticed the contactor was running very warm. I let it go and after 3 months the...

Yes, I understand that it is entirely possible to design a BMS that could defeat the hardware overcurrent protection. My point is that it is not a good idea to give a microprocessor based circuit the ability to turn off hardware over current. Over the years power engineers have been reluctant...

Are you all set with the math now? If not I can put page together and post.

Most charge controllers use the Buck topology. Current out of the controller can be quite a bit higher than the input current. There is plenty of application notes concerning the buck controller.

Inductor may cause other problems

I was going to ground it, but I will rethink it. Thanks for the input.

Yes. I was aware of color requirement, but could not find clause again. I'm in the 2014 NEC. I ordered the correct color wire -white- but they shipped black.

I don't know exactly what it is other than a commercial application. I think active deign will be needed.

I read in NEC that grounded array systems use white for the negative. I can't seem to find that clause. Anybody know where it is?

Fast fuses can also keep components from rupturing during a supercurrent event.

NM is Southwire non-metallic conduit-down 18". 1" conduit with 5x #10awg. 2 Red, 2 white and a green. White is for grounded PV system. Green not required, but thought it might come in handy to tie MOVs to service enterance ground. Current is about 17amp in the #10 so I am not concerned with...

Yes. I hope I don't have to do anymore digging after this! But if I do conduit will help

Thank you - the comparison should be just what I need. Yes, conduit is the flexible NM type from Southwire.