Trouble with lift + tire selection.

[Viper45]

How do you stay awake if nothing breaks, lolol.

Coffee, Iron Maiden/Dream Theater :rockon:, and problems such as this to keep my mind active.

Inquiring minds want to know this useless information.

:nod:

The term you are looking for is "static loaded radius." Look that up and you will be further down your journey's path. Unfortunately as soon as you fill up with gas and your family gets in, that number changes.

Sweet, thanks! That will be my topic for the night. Last night was Ohm's law, Lumens (raw and effective), Lux, and NEC 310.15(b).

 

[eddiebx]

Coffee, Iron Maiden/Dream Theater :rockon:, and problems such as this to keep my mind active.
:nod:

Sweet, thanks! That will be my topic for the night. Last night was Ohm's law, Lumens (raw and effective), Lux, and NEC 310.15(b).

Don't mean to butt-in on your researching, but do you happen to be reading the NEC ampacity chart to try to figure out what size wires to run in your truck or are you reading up on it for home renovation?

I think the NEC might be talking about solid copper core wire and AC currents, so the AWG to Ampacity will be kind of off from the ratings for stranded copper core wires and DC currents. Another thing is with DC you need to factor in voltage drop for longer runs, so depending on how long of a run you may or may not need to go with a fatter gauge to carry the intended load properly.

This is a rough guide, but you should get the idea: How to determine the best wire gauge - Cable Gauge Chart

If you're reading up for home reno, just make sure to double check with your local code and see that they follow the NEC for whatever wiring changes you plan to make. Not that the NEC is wrong in anyway, but sometimes local codes can be a weee bit different and you might have trouble passing inspections

 

[JB.]

....what am I missing that give me a 3% discrepancy (across all sizes) in my calculation? .....my only guess is that is has something to do with tire deflecting/deforming where it contacts the road, due to and an average assumed load.

I'm pretty sure (now really sure) that I recall reading that 3% is a standard reduction that closely estimates the difference between the actual tire diameter and the diameter when rolling in service.

But you already know that because you verified it arithmetically.:cheers:

 

[Viper45]

Don't mean to butt-in on your researching, but do you happen to be reading the NEC ampacity chart to try to figure out what size wires to run in your truck or are you reading up on it for home renovation?

I think the NEC might be talking about solid copper core wire and AC currents, so the AWG to Ampacity will be kind of off from the ratings for stranded copper core wires and DC currents. Another thing is with DC you need to factor in voltage drop for longer runs, so depending on how long of a run you may or may not need to go with a fatter gauge to carry the intended load properly.

This is a rough guide, but you should get the idea: How to determine the best wire gauge - Cable Gauge Chart

If you're reading up for home reno, just make sure to double check with your local code and see that they follow the NEC for whatever wiring changes you plan to make. Not that the NEC is wrong in anyway, but sometimes local codes can be a weee bit different and you might have trouble passing inspections

I'd be stupid to reject any advice, especially in this case as I didn't consider it, but to answer your question it's both. I have an unfinished basement too and am planning on finishing most of it myself. Fortunately for me, my soon to be father-in-law, is a certified electrician so I have a vast amount of knowledge I can tap into. I just want to design it "myself" and have him double check everything against the code while hopefully gaining some bonus points with him... Plus it's another challenge and opportunity to learn something

Regardless, that's a good point (solid vs stranded and AC vs DC) I didn't think of that originally and while I'm sure the concepts translate, the values for a specific gage of stranded may not. I'll see if I can't find another chart that is applicable or if they use the same one for all.

On a side note, I find it frustrating that NEC and SAE both require subscriptions to view their code. I get why, but I see many lazy people cutting corners...