Ya got it,
Question 4
Its 120/240 delta high leg
black L1 120 to ground
red L2 120 to ground
orange L3 165-180 to ground......the stinger leg, a non standard voltage
Question 5
Its 480/277 volt wye three phase
all three voltages are non standard but cant use the same color so tan, brown, orange will say 480/277 three phase
A lot of electricians think orange means three phase, but it does not, it is a ”non standard voltage”
480/277 is a non standard voltage (to ground) so orange is used there
120/240 delta hi leg L3 is a non standard voltage (165-180) so orange wire there
Like you noted many electricians do not know what the three dedicated colors are so they misapply orange to where it should not be used.
There is a very good reason for the code.
I do lots of industrial so i learn these tricks. It helps to know what you are dealing with at a glance.
Question 4
Its 120/240 delta high leg
black L1 120 to ground
red L2 120 to ground
orange L3 165-180 to ground......the stinger leg, a non standard voltage
Question 5
Its 480/277 volt wye three phase
all three voltages are non standard but cant use the same color so tan, brown, orange will say 480/277 three phase
A lot of electricians think orange means three phase, but it does not, it is a ”non standard voltage”
480/277 is a non standard voltage (to ground) so orange is used there
120/240 delta hi leg L3 is a non standard voltage (165-180) so orange wire there
Like you noted many electricians do not know what the three dedicated colors are so they misapply orange to where it should not be used.
There is a very good reason for the code.
I do lots of industrial so i learn these tricks. It helps to know what you are dealing with at a glance.