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--- reference:wire_colors [2013/09/15 01:17] – [National Electrical Code (USA)] org Alan Shea
+++ reference:wire_colors [2018/05/28 22:29] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-======MetaTek Wire Color Standard=====
+======Wire Color Standards=====
-====National Electrical Code (USA)===
+====NFPA 70 - National Electrical Code (USA)===
+  * Grounding conductor ("protective earth"/"ground"): wires must be bare, green, or green/yellow striped
   * Grounded conductor ("neutral"): wires must be white or gray
-  * Grounding conductor ("ground"): wires must be bare, green, or green/yellow striped
   * Orange, when used in a 3-phase 4 wire delta configuration supplying 120/240, shall designate the "wild" leg with 208v to neutral.
+    * Orange is the only ungrounded conductor specified by the NEC. In a 120/240 center-tapped neutral delta configuration, the two end phases on the center-tapped winding provide 120 volts to neutral, but on the wild leg you will find nearly 208 volts to the neutral. If you see an orange wire in a panel, alarm bells should go off: You don’t want to wire a 120 VAC circuit across the wild 208 volt phase.
-====IEC Standards===
+====IEC 60446 Standard===
-The color of the grounded/neutral conductor is statutorily blue. PEN (Protective/Earth Neutral, combined) conductor, when insulated, shall be marked by one of the following methods:
+  * Grounding conductor ("protective earth"/"ground"): wires must be bare, or green/yellow striped
-  * Green-and-yellow throughout its length with, in addition, light blue markings at the terminations, or
+  * Grounded conductor ("neutral"): blue.
-  * Light blue throughout its length with, in addition, green-and-yellow markings at the terminations
+  * PEN (Protective Earth/Neutral, combined) conductor, when insulated, shall be marked by one of the following methods:
+    * Green-and-yellow throughout its length with, in addition, light blue markings at the terminations, or
+    * Light blue throughout its length with, in addition, green-and-yellow markings at the terminations
+=====MetaTek Wire Color Standard=====
+The following are suggested wire colors when your local electrical code does not designate wire colors. Where your local electrical code conflicts with this standard, you must follow your local code requirements.
 ===120/240V Single-Phase===
@@ Line 24: / Line 29: @@
   * brown, violet, yellow and gray
-====230V Single Phase===
+===230V Single Phase===
   * brown and white
-  * brown and blue((IEC - blue is grounded, neutral conductor ("colder" color) -- http://www.electrical-installation.org/enwiki/The_neutral_conductor))
+  * brown and blue((IEC 60446 - blue is grounded, neutral conductor ("colder" color) -- http://www.electrical-installation.org/enwiki/The_neutral_conductor))
-====230/400V Three Phase====
+===230/400V Three Phase====
   * brown, purple, yellow, gray
   * brown, purple, yellow, blue
-  * Orange is the only specified ungrounded conductor and marks the “wild leg” of a 120/240 center-tapped neutral delta configuration. For those unfamiliar: In wild leg configuration, the two end phases on the center-tapped winding provide 120 volts to neutral, but on the wild leg you will find nearly 208 volts to the neutral. If you see an orange wire in a panel, alarm bells of caution should go off in your head. You don’t want to wire a 120 VAC outlet across the wild 208 volt phase.
+=====References====
+  * http://en.wikipedia.org/wiki/IEC_60446
+  * https://en.wikipedia.org/wiki/Electrical_wiring#Color_code
+  * http://www.allaboutcircuits.com/vol_5/chpt_2/2.html
+  * [[http://www.nema.org/Standards/Pages/Electrical-Installation-Requirements-A-Global-Perspective.aspx|Comparison of NFPA/NEC & IEC Wiring Standards]] - Free (login)
+  * [[http://www.nfpa.org/codes-and-standards/document-information-pages?mode=code&code=70|NFPA 70 - National Electrical Code (NEC)]] - Free (login)
+    * http://www.nfpa.org/freeaccess

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