COLOR CODE

[joeyboy]

In NFPA 79 the color code states the following: BLACK - will be for line circuits, RED - will be for AC control circuits, at less then line voltage.

My question is this...can RED wire be used in circits that have the same voltage as the line voltage? Example: if I have a 3 phase system (let's say 208), and I tap off on one of the legs (L1) to a fuse. Does that branch color stay BLACK or RED below that fuse.

 

[dbaird]

If your fused branch circuit is feeding a "control circuit" then I would use black on the line side of the fuse and red from there on.

David Baird
dbaird@gemcity.com

Sr Controls Engineer

EET degree.

Journeyman Electrician.

 

[Ric111]

Having read every post on color code I can find in these forums hasn't answered my question.

NFPA 79 14.2.3.2 (1) states " White with Blue stripe for Grounded (current carrying) dc circuit cunductor."

Given a power supply (switching) is wired to 120VAC and the neutral is Grounded externally. If the power supply is internally connecting the output (24VDC) return to gnd is the White with Blue a requirement.

My contention is that the power supply is not floating and the DC return is connected to ground so the White Blue is required.
Their contention is that if the DC return is not directly connected to GND via a separate ground wire then the wiring should be all blue as per 14.2.4.3(3)

Whose right?