Continuous Load for show windows

[joebell]

I'm putting together a power point to go along with the book for a class I am teaching, the chapter deals with branch circuit calculations. It is broken down into sections with one section addressing show windows. The example in the book makes reference to show windows being considered a continuous load but I can not find any language in the code to back this up.

The following section is signs and it clearly states continuous load requirements apply in 600.5(B) but I find nothing for the show window being calculated as continuous. Anyone know where I can find this or if it even exists?

 

[iwire]

I think it is just a case of applying the definition of continuos load I article 100.

I would expect the outlets to be used more than 3 hours.

 

[joebell]

I completely agree with that Bob, but I find it strange that most applications requiring the load to be calculated as continuous seem to be spelled out someplace in the code such as 600.5 for signs. I guess this calculation is to be assumed using the definition of continuous.

 

[Ponchik]

The show window calculation is 200VA per 1 foot of show window. 220.14(G)

Sign and outline lighting are calculated at 1200VA per circuit. 220.14(F)

I did not see anything about being continuous.

 

[iwire]

I completely agree with that Bob, but I find it strange that most applications requiring the load to be calculated as continuous seem to be spelled out someplace in the code such as 600.5 for signs. I guess this calculation is to be assumed using the definition of continuous.

Where is the rule that requires office lighting to be called continuous but I all think we would call it that.

 

[Smart $]

The show window calculation is 200VA per 1 foot of show window. 220.14(G)

Sign and outline lighting are calculated at 1200VA per circuit. 220.14(F)

I did not see anything about being continuous.

Continuous load factoring is not a part of Article 220 load calculations. That consideration is handled in other sections... but you have to separate continuous and noncontinuous loads while doing load calculations under Article 220... so you can apply the factoring later in the process to determine conductor ampacity and OCPD rating.

 

[joebell]

Where is the rule that requires office lighting to be called continuous but I all think we would call it that.

Good point.