DCI
Member
- Location
- NSW, Australia
Hi again blokes!
We are building an industrial control panel, in Australia, for use in Nth Dakota. I have read NFPA79 and UL508A, but would still like some further confirmation / thoughts on the matter, with regards to color coding.
UL508A (66.5) says in "industrial machinery" control panels .....Blue all ungrounded DC conductors, .....White w/Blue stripe all grounded DC conductors.
My usual practice on 24VDC systems is to differentiate between wire function, using colors.
for example:- hard connected positives say Blue, grounded negatives say Grey / Blue stripe, DC inputs say Yellow & DC outputs say Brown. Naturally all wires have numbers as well.
Is this OK, or should I just make all of the inputs & outputs Blue?
Sorry to ask a question that is so similar to those that have been posted before.
Many thanks for your time.
Gavin
We are building an industrial control panel, in Australia, for use in Nth Dakota. I have read NFPA79 and UL508A, but would still like some further confirmation / thoughts on the matter, with regards to color coding.
UL508A (66.5) says in "industrial machinery" control panels .....Blue all ungrounded DC conductors, .....White w/Blue stripe all grounded DC conductors.
My usual practice on 24VDC systems is to differentiate between wire function, using colors.
for example:- hard connected positives say Blue, grounded negatives say Grey / Blue stripe, DC inputs say Yellow & DC outputs say Brown. Naturally all wires have numbers as well.
Is this OK, or should I just make all of the inputs & outputs Blue?
Sorry to ask a question that is so similar to those that have been posted before.
Many thanks for your time.
Gavin