which is less dangerous DC 123V/20A or 50V/50A?

[pablopablo]

which is less dangerous DC 123V/20A or 50V/50A?
or does it not matter at all?

context is an 85 foot run on bedrock between solar panels and battery house. i've researched and gotten no definitive answer, just confused.
i'll probably end up putting this wire in rigid bonded conduit anyway but if one configuration is less deadly i want to do that.
i had read that DC below 60V was considered safe, but at 50A?
any help is appreciated.

 

[Avo Mk8]

I would say 50V/50A is 'safer'. Anything below 50V ac is generally considered to be 'safe' but it all depends on the circumstances. If there's no circuit protection at source, the 50A+ could be interesting if an animal chews the cable!

At 50V you will need a thick cable to avoid voltage drop. Using metric sizes I think a 10 mm2 conductor cable will give about a 6 volt drop, so you probably need bigger than that.
In the UK we typically use "steel wire armoured" (SWA) cable for on-ground/under-ground applications.

 

[westward10]

You say panels, is this the voltage per panel or total voltage of the panels?

 

[pablopablo]

You say panels, is this the voltage per panel or total voltage of the panels?

total voltage. 10 200w panels (voc 24.5). wired 2 in series 5 parallel = 50v50a. wired 5s 2p 125v20a.

 

[pablopablo]

I would say 50V/50A is 'safer'. Anything below 50V ac is generally considered to be 'safe' but it all depends on the circumstances. If there's no circuit protection at source, the 50A+ could be interesting if an animal chews the cable!

At 50V you will need a thick cable to avoid voltage drop. Using metric sizes I think a 10 mm2 conductor cable will give about a 6 volt drop, so you probably need bigger than that.
In the UK we typically use "steel wire armoured" (SWA) cable for on-ground/under-ground applications.

thanks. planning on 4awg for the 50v/50a. a bit more wire expense this way but if its safer thats the way im going. it isnt a foot traffic area, but still...
ill look into that swa.