denverpilot
Tied Down
I've seen a lot of Red/Green Yellow/Black in residential but I never saw any with the White/Blue 3rd pair. Hmm.
I’ve never seen it either. When I saw places someone wanted a third line and they had 2-pair original wiring, the damn techs would just run a new 2-pair. So now “red/green” on this leg wasn’t the same as “red/green” on the second (new) leg for line three.
Technically you were supposed to at LEAST carry some colored wire markers and mark pairs three and four at the jacks with the correct colors if you used the wrong color code, but nobody ever did that in residential. And we’d just order the right cable in business. We’d only do the wrong color code in business in an emergency and we wouldn’t close out the repair ticket until we came back and replaced the mis-colored splice.
Too many pairs to chase down bad color codes on big buildings. Leaving it all messed up was a good way to get a bad reputation at best, and reprimanded at worst.