Been ages since I've started a new thread in this area, but I have a question for our Aussie and NZ folks.
I do a lot of work on dairy systems, where they use a 24 Volt control system to power the coils in contactors and what-not.
With some of these systems, you get a box that comes pre-wired and you merely hook the field wiring up to it, that's all well and good.
But, is there a standard that tells us all what wire colours are positive and negative when using the output side of a 24VDC SMPS in a box?
I've seen pink used as the negative, I've also seen orange as the negative, with violet being the positive most times.
Pretty much is seems like it is at the whim of the person that wired the enclosure, this is the reason why I ask if there is actually a standard to be referred to for this sort of thing?
Let's face it, these days if you're not young, you're old - Red Green