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UL508A industrial Colour Code USA

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Jabz

Joined Jul 24, 2008
1
I wanted to know what is the industrial wiring colour code for 3 Phase supply and for 1 Phase supply, also what colour wire would I use when I am going from 3 Phase to 1 Phase? (USA California Standard Please)

And finally does anyone know what the industrial wiring colour code for Ac and DC is? (USA California Standard please)


Looking foward to hearing from anyone

Jabz :D
 
SgtWookie

SgtWookie

Joined Jul 17, 2007
22,230
Here's a link to Square D's FAQ for UL508A:
http://www.squared.com/us/products/motor_control.nsf/unid/BEABDD3D2C1FB03C85256EBE0047F560/$file/ul508aFrameset.htm
California has adopted the 2005 NEC.

I suggest that you have a lot of reading and searching ahead of you.

Found this tidbit on another site:
Color coding of wires internal to control cabinets is covered both in NFPA79 and UL508A.

UL508A (66.5) says in "industrial machinery" control panelsl all ungrounded power conductors shall be black, and all grounded AC conductors shall be white or grey. 66.9.1 covers the control wires: Black all ungrounded conductors at supply voltage, Red all ungrounded AC conductors at less than supply voltage, Blue all ungrounded DC conductors, White or Gray all grounded AC, and White w/Blue stripe all grounded DC conductors.

Every control panel wiring reference I have found says "if the conductor is grounded then it needs to be white".
Click to expand...
But you should read the documents themselves to make certain. Otherwise, you could make some very expensive mistakes. :eek:
 
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