== References to wire colors == 

 In the section entitled "Split Phase", the author refers to the wire colors - white, black and red.  It might be useful to indicate that those are the colors in the U.S. and Canada. European (including UK) colors are different.  I am not suggesting that the reference to the colors be removed - just indicate they apply to the U.S. and Canada.  BTW, someone stated that the article is written in "British English" - but given the reference to the wire colors lead me believe he is Canadian.  The use of the Canadian spelling doesn't bother me - perhaps because my grandmother was Canadian.  — Preceding unsigned comment added by     

 :Split phase is not common in the UK where is is more usual to supply two of three phases to premises requiring extra power, and to keep the two phases completely separate consumer-side with conventional colours (brown for both phases, blue neutral and yellow-green stripe earth).  Brown, black and grey have been compulsory three-phase colours for the past nine years, replacing the previous red, yellow and blue that confused the Germans (no insult intended).  In view of this, perhaps we need to clarify that this paragraph relates to North America.