Simple code question

[branson wirenut]

I just took the Experior Master electrical Exam and I have a question. One of the questions was, "How many risers (steps) are needed to require a 3-way switch at both ends?" (choices were 3-4-5-or 6) I spent alot of time looking this question up and still can't find it in the code book. I guess I am looking in all of the wrong places but I would love for someone to clear this up for me so I can sleep at night.

 

[don_resqcapt19]

210.70(A)(2)(c)

 

[iwire]

That is the section but it does not require the use of three ways.:wink:

You could use single poles on each landing, although the chances of having a happy customer would be slim.

 

[allenwayne]

Although the wording in that article doesn`t specify 3 way per say, It does allow one lighting outlet to supply lighting but it must have a switch at each landing to control that lighting outlet.How do you do that without a 3 way ?

 

[Pierre C Belarge]

With 2 single pole switches, one on each landing.

 

[allenwayne]

Controlling one lighting outlet????? In order to control ONE the key word is ONE lighting outlet how do you propose to be able to CONTROL ( turn on and off) one lighting outlet with two single pole switches ???

 

[allenwayne]

Thinking about it the only way that it would work is if there was a two bulbed fixture that had two seperate switch legs at ONE lighting outlet and each switch leg controlled only ONE lamp holder.That wouldn`t be worth the trouble to do.

Although poorly worded I think the intent was for a 3 way.JMHO

 

[Rockyd]

Never under estmate the power of ingenuity...Think about the strings attached to porceliens and the stunts people do so that "the switch" can be pulled from by the entrance.

 

[branson wirenut]

Well, now I don't feel so bad for not being able to find this answer. I have let it go because I am getting a headach trying to figure it out. Although, while looking answer this up I found in the 2005 INDEX under "SWITCHES" - "GENERAL USE" that it has art. 250.147 as one of the places to look, along with art. 404, & Def 100-I. I would like to know if anyone else's codebook is missing art. 250.147 or do I have an article thief in my house.

 

[branson wirenut]

Ok, after my last post I looked up and actually read all of art. 210.70(2)(c). Moderator, you are good. For some reason, I looked over the last sentance time & time again. I actually answered "6 risers" on the test. At least I got one right. LOL.