24 colt DC ground

[JJspark]

If I'm interpreting the code correctly, under 60 volts DC does not need to be grounded. Is this correct?

 

[iwire]

If I'm interpreting the code correctly, under 60 volts DC does not need to be grounded. Is this correct?

That is correct. You don't have to but you are free to do so.

 

[tom baker]

I do a lot of 24 VDC control systems and radio systems, one side of the DC is always grounded, This is especially important with radio systems using RS232 or FSK comms, to keep the DC ground reference the same. "Ground is Good" as a very experienced radio tech once told me. This multiple grounding is not an issue and does not create ground loops
So grounding of one side of the DC is optional, but I typically see it on 24 VDC systems